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1340861c KH |
1 | /* Remote debugging interface for boot monitors, for GDB. |
2 | Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* This file was derived from remote-eb.c, which did a similar job, but for | |
21 | an AMD-29K running EBMON. That file was in turn derived from remote.c | |
22 | as mentioned in the following comment (left in for comic relief): | |
23 | ||
24 | "This is like remote.c but is for a different situation-- | |
25 | having a PC running os9000 hook up with a unix machine with | |
26 | a serial line, and running ctty com2 on the PC. os9000 has a debug | |
27 | monitor called ROMBUG running. Not to mention that the PC | |
28 | has PC/NFS, so it can access the same executables that gdb can, | |
29 | over the net in real time." | |
30 | ||
31 | In reality, this module talks to a debug monitor called 'ROMBUG', which | |
32 | We communicate with ROMBUG via a direct serial line, the network version | |
33 | of ROMBUG is not available yet. | |
34 | */ | |
35 | ||
36 | #include "defs.h" | |
37 | #include "gdbcore.h" | |
38 | #include "target.h" | |
39 | #include "wait.h" | |
40 | #include <varargs.h> | |
41 | #include <signal.h> | |
42 | #include <string.h> | |
43 | #include <sys/types.h> | |
44 | #include "command.h" | |
45 | #include "serial.h" | |
46 | #include "monitor.h" | |
47 | #include "remote-utils.h" | |
48 | #include "symtab.h" | |
49 | #include "symfile.h" | |
50 | #include "objfiles.h" | |
51 | #include "gdb-stabs.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 | struct cmd_list_element *showlist; | |
61 | extern struct target_ops rombug_ops; /* Forward declaration */ | |
62 | extern struct monitor_ops rombug_cmds; /* Forward declaration */ | |
63 | extern struct cmd_list_element *setlist; | |
64 | extern struct cmd_list_element *unsetlist; | |
65 | extern int attach_flag; | |
66 | ||
67 | static void rombug_close(); | |
68 | static void rombug_fetch_register(); | |
69 | static void rombug_fetch_registers(); | |
70 | static void rombug_store_register(); | |
71 | #if 0 | |
72 | static int sr_get_debug(); /* flag set by "set remotedebug" */ | |
73 | #endif | |
74 | static int hashmark; /* flag set by "set hash" */ | |
75 | static int rombug_is_open = 0; | |
76 | ||
77 | /* FIXME: Replace with sr_get_debug (). */ | |
78 | #define LOG_FILE "monitor.log" | |
79 | #if defined (LOG_FILE) | |
80 | FILE *log_file; | |
81 | #endif | |
82 | ||
83 | static int timeout = 5; | |
84 | static int is_trace_mode = 0; | |
85 | /* Descriptor for I/O to remote machine. Initialize it to NULL*/ | |
86 | static serial_t monitor_desc = NULL; | |
87 | ||
88 | /* Send data to monitor. Works just like printf. */ | |
89 | static void | |
90 | printf_monitor(va_alist) | |
91 | va_dcl | |
92 | { | |
93 | va_list args; | |
94 | char *pattern; | |
95 | char buf[200]; | |
96 | int i; | |
97 | ||
98 | va_start(args); | |
99 | ||
100 | pattern = va_arg(args, char *); | |
101 | ||
102 | vsprintf(buf, pattern, args); | |
103 | ||
104 | if (SERIAL_WRITE(monitor_desc, buf, strlen(buf))) | |
105 | fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno)); | |
106 | } | |
107 | ||
108 | /* Read a character from the remote system, doing all the fancy timeout stuff*/ | |
109 | static int | |
110 | readchar(timeout) | |
111 | int timeout; | |
112 | { | |
113 | int c; | |
114 | ||
115 | c = SERIAL_READCHAR(monitor_desc, timeout); | |
116 | ||
117 | if (sr_get_debug()) | |
118 | putchar(c & 0x7f); | |
119 | ||
120 | #ifdef LOG_FILE | |
121 | if (isascii (c)) | |
122 | putc(c & 0x7f, log_file); | |
123 | #endif | |
124 | ||
125 | if (c >= 0) | |
126 | return c & 0x7f; | |
127 | ||
128 | if (c == SERIAL_TIMEOUT) | |
129 | { | |
130 | if (timeout == 0) | |
131 | return c; /* Polls shouldn't generate timeout errors */ | |
132 | ||
133 | error("Timeout reading from remote system."); | |
134 | } | |
135 | ||
136 | perror_with_name("remote-monitor"); | |
137 | } | |
138 | ||
139 | /* Scan input from the remote system, until STRING is found. If DISCARD is | |
140 | non-zero, then discard non-matching input, else print it out. | |
141 | Let the user break out immediately. */ | |
142 | static void | |
143 | expect(string, discard) | |
144 | char *string; | |
145 | int discard; | |
146 | { | |
147 | char *p = string; | |
148 | int c; | |
149 | ||
150 | if (sr_get_debug()) | |
151 | printf ("Expecting \"%s\"\n", string); | |
152 | ||
153 | immediate_quit = 1; | |
154 | while (1) | |
155 | { | |
156 | c = readchar(timeout); | |
157 | if (!isascii (c)) | |
158 | continue; | |
159 | if (c == *p++) | |
160 | { | |
161 | if (*p == '\0') | |
162 | { | |
163 | immediate_quit = 0; | |
164 | if (sr_get_debug()) | |
165 | printf ("\nMatched\n"); | |
166 | return; | |
167 | } | |
168 | } | |
169 | else | |
170 | { | |
171 | if (!discard) | |
172 | { | |
173 | fwrite(string, 1, (p - 1) - string, stdout); | |
174 | putchar((char)c); | |
175 | fflush(stdout); | |
176 | } | |
177 | p = string; | |
178 | } | |
179 | } | |
180 | } | |
181 | ||
182 | /* Keep discarding input until we see the ROMBUG prompt. | |
183 | ||
184 | The convention for dealing with the prompt is that you | |
185 | o give your command | |
186 | o *then* wait for the prompt. | |
187 | ||
188 | Thus the last thing that a procedure does with the serial line | |
189 | will be an expect_prompt(). Exception: rombug_resume does not | |
190 | wait for the prompt, because the terminal is being handed over | |
191 | to the inferior. However, the next thing which happens after that | |
192 | is a rombug_wait which does wait for the prompt. | |
193 | Note that this includes abnormal exit, e.g. error(). This is | |
194 | necessary to prevent getting into states from which we can't | |
195 | recover. */ | |
196 | static void | |
197 | expect_prompt(discard) | |
198 | int discard; | |
199 | { | |
200 | #if defined (LOG_FILE) | |
201 | /* This is a convenient place to do this. The idea is to do it often | |
202 | enough that we never lose much data if we terminate abnormally. */ | |
203 | fflush(log_file); | |
204 | #endif | |
205 | if (is_trace_mode) { | |
206 | expect("trace", discard); | |
207 | is_trace_mode = 0; | |
208 | } else { | |
209 | expect (PROMPT, discard); | |
210 | } | |
211 | } | |
212 | ||
213 | /* Get a hex digit from the remote system & return its value. | |
214 | If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ | |
215 | static int | |
216 | get_hex_digit(ignore_space) | |
217 | int ignore_space; | |
218 | { | |
219 | int ch; | |
220 | while (1) | |
221 | { | |
222 | ch = readchar(timeout); | |
223 | if (ch >= '0' && ch <= '9') | |
224 | return ch - '0'; | |
225 | else if (ch >= 'A' && ch <= 'F') | |
226 | return ch - 'A' + 10; | |
227 | else if (ch >= 'a' && ch <= 'f') | |
228 | return ch - 'a' + 10; | |
229 | else if (ch == ' ' && ignore_space) | |
230 | ; | |
231 | else | |
232 | { | |
233 | expect_prompt(1); | |
234 | error("Invalid hex digit from remote system."); | |
235 | } | |
236 | } | |
237 | } | |
238 | ||
239 | /* Get a byte from monitor and put it in *BYT. Accept any number | |
240 | leading spaces. */ | |
241 | static void | |
242 | get_hex_byte (byt) | |
243 | char *byt; | |
244 | { | |
245 | int val; | |
246 | ||
247 | val = get_hex_digit (1) << 4; | |
248 | val |= get_hex_digit (0); | |
249 | *byt = val; | |
250 | } | |
251 | ||
252 | /* Get N 32-bit words from remote, each preceded by a space, | |
253 | and put them in registers starting at REGNO. */ | |
254 | static void | |
255 | get_hex_regs (n, regno) | |
256 | int n; | |
257 | int regno; | |
258 | { | |
259 | long val; | |
260 | int i; | |
261 | unsigned char b; | |
262 | ||
263 | for (i = 0; i < n; i++) | |
264 | { | |
265 | int j; | |
266 | ||
267 | val = 0; | |
268 | for (j = 0; j < 4; j++) | |
269 | { | |
270 | #if TARGET_BYTE_ORDER == BIG_ENDIAN | |
271 | get_hex_byte(&b); | |
272 | val = (val << 8) + b; | |
273 | #else | |
274 | get_hex_byte(&b); | |
275 | val = val + (b << (j*8)); | |
276 | #endif | |
277 | } | |
278 | supply_register (regno++, (char *) &val); | |
279 | } | |
280 | } | |
281 | ||
282 | /* This is called not only when we first attach, but also when the | |
283 | user types "run" after having attached. */ | |
284 | static void | |
285 | rombug_create_inferior (execfile, args, env) | |
286 | char *execfile; | |
287 | char *args; | |
288 | char **env; | |
289 | { | |
290 | int entry_pt; | |
291 | ||
25200748 JK |
292 | /* Nonzero value indicates that a process really is running. */ |
293 | inferior_pid = 42; | |
294 | ||
1340861c KH |
295 | if (args && *args) |
296 | error("Can't pass arguments to remote ROMBUG process"); | |
297 | ||
298 | if (execfile == 0 || exec_bfd == 0) | |
299 | error("No exec file specified"); | |
300 | ||
301 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
302 | ||
303 | #ifdef LOG_FILE | |
304 | fputs ("\nIn Create_inferior()", log_file); | |
305 | #endif | |
306 | ||
307 | /* The "process" (board) is already stopped awaiting our commands, and | |
308 | the program is already downloaded. We just set its PC and go. */ | |
309 | ||
310 | init_wait_for_inferior (); | |
311 | proceed ((CORE_ADDR)entry_pt, TARGET_SIGNAL_DEFAULT, 0); | |
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 | |
321 | rombug_open(args, from_tty) | |
322 | char *args; | |
323 | int from_tty; | |
324 | { | |
325 | if (args == NULL) | |
326 | error ("Use `target RomBug DEVICE-NAME' to use a serial port, or \n\ | |
327 | `target RomBug HOST-NAME:PORT-NUMBER' to use a network connection."); | |
328 | ||
329 | target_preopen(from_tty); | |
330 | ||
331 | if (rombug_is_open) | |
332 | unpush_target(&rombug_ops); | |
333 | ||
334 | strcpy(dev_name, args); | |
335 | monitor_desc = SERIAL_OPEN(dev_name); | |
336 | if (monitor_desc == NULL) | |
337 | perror_with_name(dev_name); | |
338 | ||
339 | /* The baud rate was specified when GDB was started. *** | |
340 | if (SERIAL_SETBAUDRATE (monitor_desc, sr_get_baud_rate())) | |
341 | { | |
342 | SERIAL_CLOSE (monitor_desc); | |
343 | perror_with_name ("RomBug"); | |
344 | } | |
345 | */ | |
346 | SERIAL_RAW(monitor_desc); | |
347 | rombug_is_open = 1; | |
348 | ||
349 | #if defined (LOG_FILE) | |
350 | log_file = fopen (LOG_FILE, "w"); | |
351 | if (log_file == NULL) | |
352 | perror_with_name (LOG_FILE); | |
353 | #endif | |
354 | ||
355 | push_monitor (&rombug_cmds); | |
356 | ||
357 | printf_monitor("\r"); /* CR wakes up monitor */ | |
358 | expect_prompt(1); | |
359 | ||
360 | push_target (&rombug_ops); | |
361 | if (from_tty) | |
362 | printf("Remote %s connected to %s\n", target_shortname, | |
363 | dev_name); | |
364 | ||
365 | attach_flag = 1; | |
366 | rombug_fetch_registers(); | |
367 | } | |
368 | ||
369 | /* | |
370 | * Close out all files and local state before this target loses control. | |
371 | */ | |
372 | ||
373 | static void | |
374 | rombug_close (quitting) | |
375 | int quitting; | |
376 | { | |
377 | if (rombug_is_open) { | |
378 | SERIAL_CLOSE(monitor_desc); | |
379 | monitor_desc = NULL; | |
380 | rombug_is_open = 0; | |
381 | } | |
382 | ||
383 | #if defined (LOG_FILE) | |
384 | if (log_file) { | |
385 | if (ferror(log_file)) | |
386 | fprintf(stderr, "Error writing log file.\n"); | |
387 | if (fclose(log_file) != 0) | |
388 | fprintf(stderr, "Error closing log file.\n"); | |
389 | log_file = 0; | |
390 | } | |
391 | #endif | |
392 | } | |
393 | ||
394 | int | |
395 | rombug_link(mod_name, text_reloc) | |
396 | char *mod_name; | |
397 | CORE_ADDR *text_reloc; | |
398 | { | |
399 | int i, j; | |
400 | unsigned long val; | |
401 | unsigned char b; | |
402 | ||
403 | printf_monitor("l %s \r", mod_name); | |
404 | expect_prompt(1); | |
405 | printf_monitor(".r \r"); | |
406 | expect(REG_DELIM, 1); | |
407 | for (i=0; i <= 7; i++) | |
408 | { | |
409 | val = 0; | |
410 | for (j = 0; j < 4; j++) | |
411 | { | |
412 | get_hex_byte(&b); | |
413 | val = (val << 8) + b; | |
414 | } | |
415 | } | |
416 | expect_prompt(1); | |
417 | *text_reloc = val; | |
418 | return 1; | |
419 | } | |
420 | ||
421 | /* Terminate the open connection to the remote debugger. | |
422 | Use this when you want to detach and do something else | |
423 | with your gdb. */ | |
424 | static void | |
425 | rombug_detach (from_tty) | |
426 | int from_tty; | |
427 | { | |
428 | if (attach_flag) { | |
429 | printf_monitor (GO_CMD); | |
430 | attach_flag = 0; | |
431 | } | |
432 | pop_target(); /* calls rombug_close to do the real work */ | |
433 | if (from_tty) | |
434 | printf ("Ending remote %s debugging\n", target_shortname); | |
435 | } | |
436 | ||
437 | /* | |
438 | * Tell the remote machine to resume. | |
439 | */ | |
440 | static void | |
441 | rombug_resume (pid, step, sig) | |
442 | int pid, step; | |
443 | enum target_signal sig; | |
444 | { | |
445 | #ifdef LOG_FILE | |
446 | fprintf (log_file, "\nIn Resume (step=%d, sig=%d)\n", step, sig); | |
447 | #endif | |
448 | ||
449 | if (step) | |
450 | { | |
451 | is_trace_mode = 1; | |
452 | printf_monitor (STEP_CMD); | |
453 | /* wait for the echo. */ | |
454 | expect (STEP_CMD, 1); | |
455 | } | |
456 | else | |
457 | { | |
458 | printf_monitor (GO_CMD); | |
459 | /* swallow the echo. */ | |
460 | expect (GO_CMD, 1); | |
461 | } | |
462 | } | |
463 | ||
464 | /* | |
465 | * Wait until the remote machine stops, then return, | |
466 | * storing status in status just as `wait' would. | |
467 | */ | |
468 | ||
469 | static int | |
470 | rombug_wait (pid, status) | |
471 | int pid; | |
472 | struct target_waitstatus *status; | |
473 | { | |
474 | int old_timeout = timeout; | |
475 | struct section_offsets *offs; | |
476 | CORE_ADDR addr, pc; | |
25200748 | 477 | struct obj_section *obj_sec; |
1340861c KH |
478 | |
479 | #ifdef LOG_FILE | |
480 | fputs ("\nIn wait ()", log_file); | |
481 | #endif | |
482 | ||
483 | status->kind = TARGET_WAITKIND_EXITED; | |
484 | status->value.integer = 0; | |
485 | ||
486 | timeout = 0; /* Don't time out -- user program is running. */ | |
487 | expect_prompt(1); /* Wait for prompt, outputting extraneous text */ | |
488 | ||
489 | status->kind = TARGET_WAITKIND_STOPPED; | |
490 | status->value.sig = TARGET_SIGNAL_TRAP; | |
491 | timeout = old_timeout; | |
492 | rombug_fetch_registers(); | |
493 | pc = read_register(PC_REGNUM); | |
494 | addr = read_register(DATABASE_REG); | |
25200748 JK |
495 | |
496 | obj_sec = find_pc_section (pc); | |
497 | if (obj_sec != NULL) | |
498 | new_symfile_objfile (obj_sec, 1, 0); | |
499 | ||
1340861c KH |
500 | offs = ((struct section_offsets *) |
501 | alloca (sizeof (struct section_offsets) | |
502 | + (symfile_objfile->num_sections * sizeof (offs->offsets)))); | |
503 | memcpy (offs, symfile_objfile->section_offsets, | |
504 | (sizeof (struct section_offsets) + | |
505 | (symfile_objfile->num_sections * sizeof (offs->offsets)))); | |
506 | ANOFFSET (offs, SECT_OFF_DATA) = addr; | |
507 | ANOFFSET (offs, SECT_OFF_BSS) = addr; | |
508 | ||
25200748 JK |
509 | /* Because we only set offsets for DATA and BSS sections, and the other |
510 | offsets are unchanged from ->section_offsets, the other sections won't | |
511 | get relocated. */ | |
512 | objfile_relocate (symfile_objfile, offs); | |
1340861c KH |
513 | |
514 | return 0; | |
515 | } | |
516 | ||
517 | /* Return the name of register number regno in the form input and output by | |
518 | monitor. Currently, register_names just happens to contain exactly what | |
519 | monitor wants. Lets take advantage of that just as long as possible! */ | |
520 | ||
521 | static char * | |
522 | get_reg_name (regno) | |
523 | int regno; | |
524 | { | |
525 | static char buf[50]; | |
526 | char *p; | |
527 | char *b; | |
528 | ||
529 | b = buf; | |
530 | ||
531 | if (regno < 0) | |
532 | return (""); | |
533 | /* | |
534 | for (p = reg_names[regno]; *p; p++) | |
535 | *b++ = toupper(*p); | |
536 | *b = '\000'; | |
537 | */ | |
538 | p = (char *)reg_names[regno]; | |
539 | return p; | |
540 | /* | |
541 | return buf; | |
542 | */ | |
543 | } | |
544 | ||
545 | /* read the remote registers into the block regs. */ | |
546 | ||
547 | static void | |
548 | rombug_fetch_registers () | |
549 | { | |
550 | int regno, j, i; | |
551 | long val; | |
552 | unsigned char b; | |
553 | ||
554 | printf_monitor (GET_REG); | |
555 | expect("eax:", 1); | |
556 | expect("\n", 1); | |
557 | get_hex_regs(1, 0); | |
558 | get_hex_regs(1, 3); | |
559 | get_hex_regs(1, 1); | |
560 | get_hex_regs(1, 2); | |
561 | get_hex_regs(1, 6); | |
562 | get_hex_regs(1, 7); | |
563 | get_hex_regs(1, 5); | |
564 | get_hex_regs(1, 4); | |
565 | for (regno = 8; regno <= 15; regno++) | |
566 | { | |
567 | expect(REG_DELIM, 1); | |
568 | if (regno >= 8 && regno <= 13) | |
569 | { | |
570 | val = 0; | |
571 | for (j = 0; j < 2; j++) | |
572 | { | |
573 | #if TARGET_BYTE_ORDER == BIG_ENDIAN | |
574 | get_hex_byte(&b); | |
575 | val = (val << 8) + b; | |
576 | #else | |
577 | get_hex_byte(&b); | |
578 | val = val + (b << (j*8)); | |
579 | #endif | |
580 | } | |
581 | ||
582 | if (regno == 8) i = 10; | |
583 | if (regno >= 9 && regno <= 12) i = regno + 3; | |
584 | if (regno == 13) i = 11; | |
585 | supply_register (i, (char *) &val); | |
586 | } | |
587 | else if (regno == 14) | |
588 | { | |
589 | get_hex_regs(1, PC_REGNUM); | |
590 | } | |
591 | else if (regno == 15) | |
592 | { | |
593 | get_hex_regs(1, 9); | |
594 | } | |
595 | else | |
596 | { | |
597 | val = 0; | |
598 | supply_register(regno, (char *) &val); | |
599 | } | |
600 | } | |
601 | expect_prompt (1); | |
602 | } | |
603 | ||
604 | /* Fetch register REGNO, or all registers if REGNO is -1. | |
605 | Returns errno value. */ | |
606 | static void | |
607 | rombug_fetch_register (regno) | |
608 | int regno; | |
609 | { | |
610 | int val, j; | |
611 | unsigned char b; | |
612 | ||
613 | #ifdef LOG_FILE | |
614 | fprintf (log_file, "\nIn Fetch Register (reg=%s)\n", get_reg_name (regno)); | |
615 | fflush (log_file); | |
616 | #endif | |
617 | ||
618 | if (regno < 0) | |
619 | { | |
620 | rombug_fetch_registers (); | |
621 | } | |
622 | else | |
623 | { | |
624 | char *name = get_reg_name (regno); | |
625 | printf_monitor (GET_REG); | |
626 | if (regno >= 10 && regno <= 15) | |
627 | { | |
628 | expect ("\n", 1); | |
629 | expect ("\n", 1); | |
630 | expect (name, 1); | |
631 | expect (REG_DELIM, 1); | |
632 | val = 0; | |
633 | for (j = 0; j < 2; j++) | |
634 | { | |
635 | #if TARGET_BYTE_ORDER == BIG_ENDIAN | |
636 | get_hex_byte(&b); | |
637 | val = (val << 8) + b; | |
638 | #else | |
639 | get_hex_byte(&b); | |
640 | val = val + (b << (j*8)); | |
641 | #endif | |
642 | } | |
643 | supply_register (regno, (char *) &val); | |
644 | } | |
645 | else if (regno == 8 || regno == 9) | |
646 | { | |
647 | expect ("\n", 1); | |
648 | expect ("\n", 1); | |
649 | expect ("\n", 1); | |
650 | expect (name, 1); | |
651 | expect (REG_DELIM, 1); | |
652 | get_hex_regs (1, regno); | |
653 | } | |
654 | else | |
655 | { | |
656 | expect (name, 1); | |
657 | expect (REG_DELIM, 1); | |
658 | expect("\n", 1); | |
659 | get_hex_regs(1, 0); | |
660 | get_hex_regs(1, 3); | |
661 | get_hex_regs(1, 1); | |
662 | get_hex_regs(1, 2); | |
663 | get_hex_regs(1, 6); | |
664 | get_hex_regs(1, 7); | |
665 | get_hex_regs(1, 5); | |
666 | get_hex_regs(1, 4); | |
667 | } | |
668 | expect_prompt (1); | |
669 | } | |
670 | return; | |
671 | } | |
672 | ||
673 | /* Store the remote registers from the contents of the block REGS. */ | |
674 | ||
675 | static void | |
676 | rombug_store_registers () | |
677 | { | |
678 | int regno; | |
679 | ||
680 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
681 | rombug_store_register(regno); | |
682 | ||
683 | registers_changed (); | |
684 | } | |
685 | ||
686 | /* Store register REGNO, or all if REGNO == 0. | |
687 | return errno value. */ | |
688 | static void | |
689 | rombug_store_register (regno) | |
690 | int regno; | |
691 | { | |
692 | char *name; | |
693 | ||
694 | #ifdef LOG_FILE | |
695 | fprintf (log_file, "\nIn Store_register (regno=%d)\n", regno); | |
696 | #endif | |
697 | if (regno == -1) | |
698 | rombug_store_registers (); | |
699 | else | |
700 | { | |
701 | if (sr_get_debug()) | |
702 | printf ("Setting register %s to 0x%x\n", get_reg_name (regno), read_register (regno)); | |
703 | ||
704 | name = get_reg_name(regno); | |
705 | if (name == 0) return; | |
706 | printf_monitor (SET_REG, name, read_register (regno)); | |
707 | ||
708 | expect_prompt (1); | |
709 | } | |
710 | } | |
711 | ||
712 | /* Get ready to modify the registers array. On machines which store | |
713 | individual registers, this doesn't need to do anything. On machines | |
714 | which store all the registers in one fell swoop, this makes sure | |
715 | that registers contains all the registers from the program being | |
716 | debugged. */ | |
717 | ||
718 | static void | |
719 | rombug_prepare_to_store () | |
720 | { | |
721 | /* Do nothing, since we can store individual regs */ | |
722 | } | |
723 | ||
724 | static void | |
725 | rombug_files_info () | |
726 | { | |
727 | printf ("\tAttached to %s at %d baud.\n", | |
728 | dev_name, baudrate); | |
729 | } | |
730 | ||
731 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
732 | to inferior's memory at MEMADDR. Returns length moved. */ | |
733 | static int | |
734 | rombug_write_inferior_memory (memaddr, myaddr, len) | |
735 | CORE_ADDR memaddr; | |
736 | unsigned char *myaddr; | |
737 | int len; | |
738 | { | |
739 | int i; | |
740 | char buf[10]; | |
741 | ||
742 | #ifdef LOG_FILE | |
743 | fprintf (log_file, "\nIn Write_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len); | |
744 | #endif | |
745 | printf_monitor (MEM_SET_CMD, memaddr + i); | |
746 | for (i = 0; i < len; i++) | |
747 | { | |
748 | expect (CMD_DELIM, 1); | |
749 | printf_monitor ("%x", myaddr[i]); | |
750 | if (sr_get_debug()) | |
751 | printf ("\nSet 0x%x to 0x%x\n", memaddr + i, myaddr[i]); | |
752 | } | |
753 | if (CMD_END) | |
754 | printf_monitor (CMD_END); | |
755 | expect_prompt (1); | |
756 | ||
757 | return len; | |
758 | } | |
759 | ||
760 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
761 | at debugger address MYADDR. Returns length moved. */ | |
762 | static int | |
763 | rombug_read_inferior_memory(memaddr, myaddr, len) | |
764 | CORE_ADDR memaddr; | |
765 | char *myaddr; | |
766 | int len; | |
767 | { | |
768 | int i, j; | |
769 | char buf[20]; | |
770 | ||
771 | /* Number of bytes read so far. */ | |
772 | int count; | |
773 | ||
774 | /* Starting address of this pass. */ | |
775 | unsigned long startaddr; | |
776 | ||
777 | /* Number of bytes to read in this pass. */ | |
778 | int len_this_pass; | |
779 | ||
780 | #ifdef LOG_FILE | |
781 | fprintf (log_file, "\nIn Read_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len); | |
782 | #endif | |
783 | ||
784 | /* Note that this code works correctly if startaddr is just less | |
785 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
786 | thing). That is, something like | |
787 | rombug_read_bytes (CORE_ADDR_MAX - 4, foo, 4) | |
788 | works--it never adds len To memaddr and gets 0. */ | |
789 | /* However, something like | |
790 | rombug_read_bytes (CORE_ADDR_MAX - 3, foo, 4) | |
791 | doesn't need to work. Detect it and give up if there's an attempt | |
792 | to do that. */ | |
793 | if (((memaddr - 1) + len) < memaddr) { | |
794 | errno = EIO; | |
795 | return 0; | |
796 | } | |
797 | ||
798 | startaddr = memaddr; | |
799 | count = 0; | |
800 | while (count < len) | |
801 | { | |
802 | len_this_pass = 16; | |
803 | if ((startaddr % 16) != 0) | |
804 | len_this_pass -= startaddr % 16; | |
805 | if (len_this_pass > (len - count)) | |
806 | len_this_pass = (len - count); | |
807 | if (sr_get_debug()) | |
808 | printf ("\nDisplay %d bytes at %x\n", len_this_pass, startaddr); | |
809 | ||
810 | printf_monitor (MEM_DIS_CMD, startaddr, 16); | |
811 | expect ("- ", 1); | |
812 | for (i = 0; i < len_this_pass; i++) | |
813 | { | |
814 | get_hex_byte (&myaddr[count++]); | |
815 | if (sr_get_debug()) | |
816 | printf ("\nRead a 0x%x from 0x%x\n", myaddr[count-1], startaddr); | |
817 | startaddr += 1; | |
818 | } | |
819 | expect(CMD_DELIM, 1); | |
820 | } | |
821 | if (CMD_END) | |
822 | printf_monitor (CMD_END); | |
823 | expect_prompt (1); | |
824 | ||
825 | return len; | |
826 | } | |
827 | ||
828 | /* FIXME-someday! merge these two. */ | |
829 | static int | |
830 | rombug_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
831 | CORE_ADDR memaddr; | |
832 | char *myaddr; | |
833 | int len; | |
834 | int write; | |
835 | struct target_ops *target; /* ignored */ | |
836 | { | |
837 | if (write) | |
838 | return rombug_write_inferior_memory (memaddr, myaddr, len); | |
839 | else | |
840 | return rombug_read_inferior_memory (memaddr, myaddr, len); | |
841 | } | |
842 | ||
843 | static void | |
844 | rombug_kill (args, from_tty) | |
845 | char *args; | |
846 | int from_tty; | |
847 | { | |
848 | return; /* ignore attempts to kill target system */ | |
849 | } | |
850 | ||
851 | /* Clean up when a program exits. | |
852 | The program actually lives on in the remote processor's RAM, and may be | |
853 | run again without a download. Don't leave it full of breakpoint | |
854 | instructions. */ | |
855 | ||
856 | static void | |
857 | rombug_mourn_inferior () | |
858 | { | |
859 | remove_breakpoints (); | |
860 | generic_mourn_inferior (); /* Do all the proper things now */ | |
861 | } | |
862 | ||
863 | #define MAX_MONITOR_BREAKPOINTS 16 | |
864 | ||
865 | extern int memory_breakpoint_size; | |
866 | static CORE_ADDR breakaddr[MAX_MONITOR_BREAKPOINTS] = {0}; | |
867 | ||
868 | static int | |
869 | rombug_insert_breakpoint (addr, shadow) | |
870 | CORE_ADDR addr; | |
871 | char *shadow; | |
872 | { | |
873 | int i; | |
874 | ||
875 | #ifdef LOG_FILE | |
876 | fprintf (log_file, "\nIn Insert_breakpoint (addr=%x)\n", addr); | |
877 | #endif | |
878 | for (i = 0; i <= MAX_MONITOR_BREAKPOINTS; i++) | |
879 | if (breakaddr[i] == 0) | |
880 | { | |
881 | breakaddr[i] = addr; | |
882 | if (sr_get_debug()) | |
883 | printf ("Breakpoint at %x\n", addr); | |
884 | rombug_read_inferior_memory(addr, shadow, memory_breakpoint_size); | |
885 | printf_monitor(SET_BREAK_CMD, addr); | |
886 | expect_prompt(1); | |
887 | return 0; | |
888 | } | |
889 | ||
890 | fprintf(stderr, "Too many breakpoints (> 16) for monitor\n"); | |
891 | return 1; | |
892 | } | |
893 | ||
894 | /* | |
895 | * _remove_breakpoint -- Tell the monitor to remove a breakpoint | |
896 | */ | |
897 | static int | |
898 | rombug_remove_breakpoint (addr, shadow) | |
899 | CORE_ADDR addr; | |
900 | char *shadow; | |
901 | { | |
902 | int i; | |
903 | ||
904 | #ifdef LOG_FILE | |
905 | fprintf (log_file, "\nIn Remove_breakpoint (addr=%x)\n", addr); | |
906 | #endif | |
907 | for (i = 0; i < MAX_MONITOR_BREAKPOINTS; i++) | |
908 | if (breakaddr[i] == addr) | |
909 | { | |
910 | breakaddr[i] = 0; | |
911 | /* some monitors remove breakpoints based on the address */ | |
912 | if (strcasecmp (target_shortname, "bug") == 0) | |
913 | printf_monitor(CLR_BREAK_CMD, addr); | |
914 | else | |
915 | printf_monitor(CLR_BREAK_CMD, i); | |
916 | expect_prompt(1); | |
917 | return 0; | |
918 | } | |
919 | ||
920 | fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr); | |
921 | return 1; | |
922 | } | |
923 | ||
924 | /* Load a file. This is usually an srecord, which is ascii. No | |
925 | protocol, just sent line by line. */ | |
926 | ||
927 | #define DOWNLOAD_LINE_SIZE 100 | |
928 | static void | |
929 | rombug_load (arg) | |
930 | char *arg; | |
931 | { | |
932 | /* this part comment out for os9* */ | |
933 | #if 0 | |
934 | FILE *download; | |
935 | char buf[DOWNLOAD_LINE_SIZE]; | |
936 | int i, bytes_read; | |
937 | ||
938 | if (sr_get_debug()) | |
939 | printf ("Loading %s to monitor\n", arg); | |
940 | ||
941 | download = fopen (arg, "r"); | |
942 | if (download == NULL) | |
943 | { | |
944 | error (sprintf (buf, "%s Does not exist", arg)); | |
945 | return; | |
946 | } | |
947 | ||
948 | printf_monitor (LOAD_CMD); | |
949 | /* expect ("Waiting for S-records from host... ", 1); */ | |
950 | ||
951 | while (!feof (download)) | |
952 | { | |
953 | bytes_read = fread (buf, sizeof (char), DOWNLOAD_LINE_SIZE, download); | |
954 | if (hashmark) | |
955 | { | |
956 | putchar ('.'); | |
957 | fflush (stdout); | |
958 | } | |
959 | ||
960 | if (SERIAL_WRITE(monitor_desc, buf, bytes_read)) { | |
961 | fprintf(stderr, "SERIAL_WRITE failed: (while downloading) %s\n", safe_strerror(errno)); | |
962 | break; | |
963 | } | |
964 | i = 0; | |
965 | while (i++ <=200000) {} ; /* Ugly HACK, probably needs flow control */ | |
966 | if (bytes_read < DOWNLOAD_LINE_SIZE) | |
967 | { | |
968 | if (!feof (download)) | |
969 | error ("Only read %d bytes\n", bytes_read); | |
970 | break; | |
971 | } | |
972 | } | |
973 | ||
974 | if (hashmark) | |
975 | { | |
976 | putchar ('\n'); | |
977 | } | |
978 | if (!feof (download)) | |
979 | error ("Never got EOF while downloading"); | |
980 | fclose (download); | |
981 | #endif 0 | |
982 | } | |
983 | ||
984 | /* Put a command string, in args, out to MONITOR. | |
985 | Output from MONITOR is placed on the users terminal until the prompt | |
986 | is seen. */ | |
987 | ||
988 | static void | |
989 | rombug_command (args, fromtty) | |
990 | char *args; | |
991 | int fromtty; | |
992 | { | |
993 | #ifdef LOG_FILE | |
994 | fprintf (log_file, "\nIn command (args=%s)\n", args); | |
995 | #endif | |
996 | if (monitor_desc == NULL) | |
997 | error("monitor target not open."); | |
998 | ||
999 | if (!args) | |
1000 | error("Missing command."); | |
1001 | ||
1002 | printf_monitor("%s\r", args); | |
1003 | expect_prompt(0); | |
1004 | } | |
1005 | ||
1006 | #if 0 | |
1007 | /* Connect the user directly to MONITOR. This command acts just like the | |
1008 | 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */ | |
1009 | ||
1010 | static struct ttystate ttystate; | |
1011 | ||
1012 | static void | |
1013 | cleanup_tty() | |
1014 | { printf("\r\n[Exiting connect mode]\r\n"); | |
1015 | /*SERIAL_RESTORE(0, &ttystate);*/ | |
1016 | } | |
1017 | ||
1018 | static void | |
1019 | connect_command (args, fromtty) | |
1020 | char *args; | |
1021 | int fromtty; | |
1022 | { | |
1023 | fd_set readfds; | |
1024 | int numfds; | |
1025 | int c; | |
1026 | char cur_esc = 0; | |
1027 | ||
1028 | dont_repeat(); | |
1029 | ||
1030 | if (monitor_desc == NULL) | |
1031 | error("monitor target not open."); | |
1032 | ||
1033 | if (args) | |
1034 | fprintf("This command takes no args. They have been ignored.\n"); | |
1035 | ||
1036 | printf("[Entering connect mode. Use ~. or ~^D to escape]\n"); | |
1037 | ||
1038 | serial_raw(0, &ttystate); | |
1039 | ||
1040 | make_cleanup(cleanup_tty, 0); | |
1041 | ||
1042 | FD_ZERO(&readfds); | |
1043 | ||
1044 | while (1) | |
1045 | { | |
1046 | do | |
1047 | { | |
1048 | FD_SET(0, &readfds); | |
1049 | FD_SET(monitor_desc, &readfds); | |
1050 | numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0); | |
1051 | } | |
1052 | while (numfds == 0); | |
1053 | ||
1054 | if (numfds < 0) | |
1055 | perror_with_name("select"); | |
1056 | ||
1057 | if (FD_ISSET(0, &readfds)) | |
1058 | { /* tty input, send to monitor */ | |
1059 | c = getchar(); | |
1060 | if (c < 0) | |
1061 | perror_with_name("connect"); | |
1062 | ||
1063 | printf_monitor("%c", c); | |
1064 | switch (cur_esc) | |
1065 | { | |
1066 | case 0: | |
1067 | if (c == '\r') | |
1068 | cur_esc = c; | |
1069 | break; | |
1070 | case '\r': | |
1071 | if (c == '~') | |
1072 | cur_esc = c; | |
1073 | else | |
1074 | cur_esc = 0; | |
1075 | break; | |
1076 | case '~': | |
1077 | if (c == '.' || c == '\004') | |
1078 | return; | |
1079 | else | |
1080 | cur_esc = 0; | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | if (FD_ISSET(monitor_desc, &readfds)) | |
1085 | { | |
1086 | while (1) | |
1087 | { | |
1088 | c = readchar(0); | |
1089 | if (c < 0) | |
1090 | break; | |
1091 | putchar(c); | |
1092 | } | |
1093 | fflush(stdout); | |
1094 | } | |
1095 | } | |
1096 | } | |
1097 | #endif | |
1098 | ||
1099 | /* | |
1100 | * Define the monitor command strings. Since these are passed directly | |
1101 | * through to a printf style function, we need can include formatting | |
1102 | * strings. We also need a CR or LF on the end. | |
1103 | */ | |
1104 | struct monitor_ops rombug_cmds = { | |
1105 | "g \r", /* execute or usually GO command */ | |
1106 | "g \r", /* continue command */ | |
1107 | "gs \r", /* single step */ | |
1108 | "b %x\r", /* set a breakpoint */ | |
1109 | "k %x\r", /* clear a breakpoint */ | |
1110 | "c %x\r", /* set memory to a value */ | |
1111 | "d %x %d\r", /* display memory */ | |
1112 | "$%08X", /* prompt memory commands use */ | |
1113 | ".%s %x\r", /* set a register */ | |
1114 | ":", /* delimiter between registers */ | |
1115 | ". \r", /* read a register */ | |
1116 | "mf \r", /* download command */ | |
1117 | "RomBug: ", /* monitor command prompt */ | |
1118 | ": ", /* end-of-command delimitor */ | |
1119 | ".\r" /* optional command terminator */ | |
1120 | }; | |
1121 | ||
1122 | struct target_ops rombug_ops = { | |
1123 | "rombug", | |
1124 | "Microware's ROMBUG debug monitor", | |
1125 | "Use a remote computer running the ROMBUG debug monitor.\n\ | |
1126 | Specify the serial device it is connected to (e.g. /dev/ttya).", | |
1127 | rombug_open, | |
1128 | rombug_close, | |
1129 | 0, | |
1130 | rombug_detach, | |
1131 | rombug_resume, | |
1132 | rombug_wait, | |
1133 | rombug_fetch_register, | |
1134 | rombug_store_register, | |
1135 | rombug_prepare_to_store, | |
1136 | rombug_xfer_inferior_memory, | |
1137 | rombug_files_info, | |
1138 | rombug_insert_breakpoint, | |
1139 | rombug_remove_breakpoint, /* Breakpoints */ | |
1140 | 0, | |
1141 | 0, | |
1142 | 0, | |
1143 | 0, | |
1144 | 0, /* Terminal handling */ | |
1145 | rombug_kill, | |
1146 | rombug_load, /* load */ | |
1147 | rombug_link, /* lookup_symbol */ | |
1148 | rombug_create_inferior, | |
1149 | rombug_mourn_inferior, | |
1150 | 0, /* can_run */ | |
1151 | 0, /* notice_signals */ | |
1152 | process_stratum, | |
1153 | 0, /* next */ | |
1154 | 1, | |
1155 | 1, | |
1156 | 1, | |
1157 | 1, | |
1158 | 1, /* has execution */ | |
1159 | 0, | |
1160 | 0, /* Section pointers */ | |
1161 | OPS_MAGIC, /* Always the last thing */ | |
1162 | }; | |
1163 | ||
1164 | void | |
1165 | _initialize_remote_os9k () | |
1166 | { | |
1167 | add_target (&rombug_ops); | |
1168 | ||
1169 | add_show_from_set ( | |
1170 | add_set_cmd ("hash", no_class, var_boolean, (char *)&hashmark, | |
1171 | "Set display of activity while downloading a file.\nWhen enabled, a period \'.\' is displayed.", | |
1172 | &setlist), | |
1173 | &showlist); | |
1174 | ||
1175 | add_show_from_set ( | |
1176 | add_set_cmd ("timeout", no_class, var_zinteger, | |
1177 | (char *) &timeout, | |
1178 | "Set timeout in seconds for remote MIPS serial I/O.", | |
1179 | &setlist), | |
1180 | &showlist); | |
1181 | ||
1182 | ||
1183 | add_com ("rombug <command>", class_obscure, rombug_command, | |
1184 | "Send a command to the debug monitor."); | |
1185 | #if 0 | |
1186 | add_com ("connect", class_obscure, connect_command, | |
1187 | "Connect the terminal directly up to a serial based command monitor.\nUse <CR>~. or <CR>~^D to break out."); | |
1188 | #endif | |
1189 | } |