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c906108c SS |
1 | /* Remote debugging interface for Array Tech RAID controller.. |
2 | Copyright 90, 91, 92, 93, 94, 1995, 1998 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. Written by Rob Savoye for Cygnus. | |
4 | ||
5 | This module talks to a debug monitor called 'MONITOR', which | |
6 | We communicate with MONITOR via either a direct serial line, or a TCP | |
7 | (or possibly TELNET) stream to a terminal multiplexor, | |
8 | which in turn talks to the target board. | |
9 | ||
10 | This file is part of GDB. | |
11 | ||
12 | This program is free software; you can redistribute it and/or modify | |
13 | it under the terms of the GNU General Public License as published by | |
14 | the Free Software Foundation; either version 2 of the License, or | |
15 | (at your option) any later version. | |
16 | ||
17 | This program is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
23 | along with this program; if not, write to the Free Software | |
24 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
26 | ||
27 | #include "defs.h" | |
28 | #include "gdbcore.h" | |
29 | #include "target.h" | |
30 | #include "wait.h" | |
31 | #ifdef ANSI_PROTOTYPES | |
32 | #include <stdarg.h> | |
33 | #else | |
34 | #include <varargs.h> | |
35 | #endif | |
36 | #include <ctype.h> | |
37 | #include <signal.h> | |
38 | #include <sys/types.h> | |
39 | #include "gdb_string.h" | |
40 | #include "command.h" | |
41 | #include "serial.h" | |
42 | #include "monitor.h" | |
43 | #include "remote-utils.h" | |
44 | ||
45 | extern int baud_rate; | |
46 | ||
47 | #define ARRAY_PROMPT ">> " | |
48 | ||
49 | #define SWAP_TARGET_AND_HOST(buffer,len) \ | |
50 | do \ | |
51 | { \ | |
52 | if (TARGET_BYTE_ORDER != HOST_BYTE_ORDER) \ | |
53 | { \ | |
54 | char tmp; \ | |
55 | char *p = (char *)(buffer); \ | |
56 | char *q = ((char *)(buffer)) + len - 1; \ | |
57 | for (; p < q; p++, q--) \ | |
58 | { \ | |
59 | tmp = *q; \ | |
60 | *q = *p; \ | |
61 | *p = tmp; \ | |
62 | } \ | |
63 | } \ | |
64 | } \ | |
65 | while (0) | |
66 | ||
67 | static void debuglogs PARAMS((int, char *, ...)); | |
68 | static void array_open(); | |
69 | static void array_close(); | |
70 | static void array_detach(); | |
71 | static void array_attach(); | |
72 | static void array_resume(); | |
73 | static void array_fetch_register(); | |
74 | static void array_store_register(); | |
75 | static void array_fetch_registers(); | |
76 | static void array_store_registers(); | |
77 | static void array_prepare_to_store(); | |
78 | static void array_files_info(); | |
79 | static void array_kill(); | |
80 | static void array_create_inferior(); | |
81 | static void array_mourn_inferior(); | |
82 | static void make_gdb_packet(); | |
83 | static int array_xfer_memory(); | |
84 | static int array_wait(); | |
85 | static int array_insert_breakpoint(); | |
86 | static int array_remove_breakpoint(); | |
87 | static int tohex(); | |
88 | static int to_hex(); | |
89 | static int from_hex(); | |
90 | static int array_send_packet(); | |
91 | static int array_get_packet(); | |
92 | static unsigned long ascii2hexword(); | |
93 | static void hexword2ascii(); | |
94 | ||
95 | extern char *version; | |
96 | ||
97 | #define LOG_FILE "monitor.log" | |
98 | #if defined (LOG_FILE) | |
99 | FILE *log_file; | |
100 | #endif | |
101 | ||
102 | static int timeout = 30; | |
103 | /* Having this larger than 400 causes us to be incompatible with m68k-stub.c | |
104 | and i386-stub.c. Normally, no one would notice because it only matters | |
105 | for writing large chunks of memory (e.g. in downloads). Also, this needs | |
106 | to be more than 400 if required to hold the registers (see below, where | |
107 | we round it up based on REGISTER_BYTES). */ | |
108 | #define PBUFSIZ 400 | |
109 | ||
110 | /* | |
111 | * Descriptor for I/O to remote machine. Initialize it to NULL so that | |
112 | * array_open knows that we don't have a file open when the program starts. | |
113 | */ | |
114 | serial_t array_desc = NULL; | |
115 | ||
116 | /* | |
117 | * this array of registers need to match the indexes used by GDB. The | |
118 | * whole reason this exists is cause the various ROM monitors use | |
119 | * different strings than GDB does, and doesn't support all the | |
120 | * registers either. So, typing "info reg sp" becomes a "r30". | |
121 | */ | |
122 | extern char *tmp_mips_processor_type; | |
123 | extern int mips_set_processor_type(); | |
124 | ||
125 | static struct target_ops array_ops ; | |
126 | ||
127 | static void | |
128 | init_array_ops(void) | |
129 | { | |
130 | array_ops.to_shortname = "array"; | |
131 | array_ops.to_longname = | |
132 | "Debug using the standard GDB remote protocol for the Array Tech target.", | |
133 | array_ops.to_doc = | |
134 | "Debug using the standard GDB remote protocol for the Array Tech target.\n\ | |
135 | Specify the serial device it is connected to (e.g. /dev/ttya)." ; | |
136 | array_ops.to_open = array_open; | |
137 | array_ops.to_close = array_close; | |
138 | array_ops.to_attach = NULL; | |
139 | array_ops.to_post_attach = NULL; | |
140 | array_ops.to_require_attach = NULL; | |
141 | array_ops.to_detach = array_detach; | |
142 | array_ops.to_require_detach = NULL; | |
143 | array_ops.to_resume = array_resume; | |
144 | array_ops.to_wait = array_wait; | |
145 | array_ops.to_post_wait = NULL; | |
146 | array_ops.to_fetch_registers = array_fetch_registers; | |
147 | array_ops.to_store_registers = array_store_registers; | |
148 | array_ops.to_prepare_to_store = array_prepare_to_store; | |
149 | array_ops.to_xfer_memory = array_xfer_memory; | |
150 | array_ops.to_files_info = array_files_info; | |
151 | array_ops.to_insert_breakpoint = array_insert_breakpoint; | |
152 | array_ops.to_remove_breakpoint = array_remove_breakpoint; | |
153 | array_ops.to_terminal_init = 0; | |
154 | array_ops.to_terminal_inferior = 0; | |
155 | array_ops.to_terminal_ours_for_output = 0; | |
156 | array_ops.to_terminal_ours = 0; | |
157 | array_ops.to_terminal_info = 0; | |
158 | array_ops.to_kill = array_kill; | |
159 | array_ops.to_load = 0; | |
160 | array_ops.to_lookup_symbol = 0; | |
161 | array_ops.to_create_inferior = array_create_inferior; | |
162 | array_ops.to_post_startup_inferior = NULL; | |
163 | array_ops.to_acknowledge_created_inferior = NULL; | |
164 | array_ops.to_clone_and_follow_inferior = NULL; | |
165 | array_ops.to_post_follow_inferior_by_clone = NULL; | |
166 | array_ops.to_insert_fork_catchpoint = NULL; | |
167 | array_ops.to_remove_fork_catchpoint = NULL; | |
168 | array_ops.to_insert_vfork_catchpoint = NULL; | |
169 | array_ops.to_remove_vfork_catchpoint = NULL; | |
170 | array_ops.to_has_forked = NULL; | |
171 | array_ops.to_has_vforked = NULL; | |
172 | array_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
173 | array_ops.to_post_follow_vfork = NULL; | |
174 | array_ops.to_insert_exec_catchpoint = NULL; | |
175 | array_ops.to_remove_exec_catchpoint = NULL; | |
176 | array_ops.to_has_execd = NULL; | |
177 | array_ops.to_reported_exec_events_per_exec_call = NULL; | |
178 | array_ops.to_has_exited = NULL; | |
179 | array_ops.to_mourn_inferior = array_mourn_inferior; | |
180 | array_ops.to_can_run = 0; | |
181 | array_ops.to_notice_signals = 0; | |
182 | array_ops.to_thread_alive = 0; | |
183 | array_ops.to_stop = 0; | |
184 | array_ops.to_pid_to_exec_file = NULL; | |
185 | array_ops.to_core_file_to_sym_file = NULL; | |
186 | array_ops.to_stratum = process_stratum; | |
187 | array_ops.DONT_USE = 0; | |
188 | array_ops.to_has_all_memory = 1; | |
189 | array_ops.to_has_memory = 1; | |
190 | array_ops.to_has_stack = 1; | |
191 | array_ops.to_has_registers = 1; | |
192 | array_ops.to_has_execution = 1; | |
193 | array_ops.to_sections = 0; | |
194 | array_ops.to_sections_end = 0; | |
195 | array_ops.to_magic = OPS_MAGIC; | |
196 | }; | |
197 | ||
198 | /* | |
199 | * printf_monitor -- send data to monitor. Works just like printf. | |
200 | */ | |
201 | static void | |
202 | #ifdef ANSI_PROTOTYPES | |
203 | printf_monitor(char *pattern, ...) | |
204 | #else | |
205 | printf_monitor(va_alist) | |
206 | va_dcl | |
207 | #endif | |
208 | { | |
209 | va_list args; | |
210 | char buf[PBUFSIZ]; | |
211 | int i; | |
212 | ||
213 | #ifdef ANSI_PROTOTYPES | |
214 | va_start(args, pattern); | |
215 | #else | |
216 | char *pattern; | |
217 | va_start(args); | |
218 | pattern = va_arg(args, char *); | |
219 | #endif | |
220 | ||
221 | vsprintf(buf, pattern, args); | |
222 | ||
223 | debuglogs (1, "printf_monitor(), Sending: \"%s\".", buf); | |
224 | ||
225 | if (strlen(buf) > PBUFSIZ) | |
226 | error ("printf_monitor(): string too long"); | |
227 | if (SERIAL_WRITE(array_desc, buf, strlen(buf))) | |
228 | fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno)); | |
229 | } | |
230 | /* | |
231 | * write_monitor -- send raw data to monitor. | |
232 | */ | |
233 | static void | |
234 | write_monitor(data, len) | |
235 | char data[]; | |
236 | int len; | |
237 | { | |
238 | if (SERIAL_WRITE(array_desc, data, len)) | |
239 | fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno)); | |
240 | ||
241 | *(data + len+1) = '\0'; | |
242 | debuglogs (1, "write_monitor(), Sending: \"%s\".", data); | |
243 | ||
244 | } | |
245 | ||
246 | /* | |
247 | * debuglogs -- deal with debugging info to multiple sources. This takes | |
248 | * two real args, the first one is the level to be compared against | |
249 | * the sr_get_debug() value, the second arg is a printf buffer and args | |
250 | * to be formatted and printed. A CR is added after each string is printed. | |
251 | */ | |
252 | static void | |
253 | #ifdef ANSI_PROTOTYPES | |
254 | debuglogs(int level, char *pattern, ...) | |
255 | #else | |
256 | debuglogs(va_alist) | |
257 | va_dcl | |
258 | #endif | |
259 | { | |
260 | va_list args; | |
261 | char *p; | |
262 | unsigned char buf[PBUFSIZ]; | |
263 | char newbuf[PBUFSIZ]; | |
264 | int i; | |
265 | ||
266 | #ifdef ANSI_PROTOTYPES | |
267 | va_start(args, pattern); | |
268 | #else | |
269 | char *pattern; | |
270 | int level; | |
271 | va_start(args); | |
272 | level = va_arg(args, int); /* get the debug level */ | |
273 | pattern = va_arg(args, char *); /* get the printf style pattern */ | |
274 | #endif | |
275 | ||
276 | if ((level <0) || (level > 100)) { | |
277 | error ("Bad argument passed to debuglogs(), needs debug level"); | |
278 | return; | |
279 | } | |
280 | ||
281 | vsprintf(buf, pattern, args); /* format the string */ | |
282 | ||
283 | /* convert some characters so it'll look right in the log */ | |
284 | p = newbuf; | |
285 | for (i = 0 ; buf[i] != '\0'; i++) { | |
286 | if (i > PBUFSIZ) | |
287 | error ("Debug message too long"); | |
288 | switch (buf[i]) { | |
289 | case '\n': /* newlines */ | |
290 | *p++ = '\\'; | |
291 | *p++ = 'n'; | |
292 | continue; | |
293 | case '\r': /* carriage returns */ | |
294 | *p++ = '\\'; | |
295 | *p++ = 'r'; | |
296 | continue; | |
297 | case '\033': /* escape */ | |
298 | *p++ = '\\'; | |
299 | *p++ = 'e'; | |
300 | continue; | |
301 | case '\t': /* tab */ | |
302 | *p++ = '\\'; | |
303 | *p++ = 't'; | |
304 | continue; | |
305 | case '\b': /* backspace */ | |
306 | *p++ = '\\'; | |
307 | *p++ = 'b'; | |
308 | continue; | |
309 | default: /* no change */ | |
310 | *p++ = buf[i]; | |
311 | } | |
312 | ||
313 | if (buf[i] < 26) { /* modify control characters */ | |
314 | *p++ = '^'; | |
315 | *p++ = buf[i] + 'A'; | |
316 | continue; | |
317 | } | |
318 | if (buf[i] >= 128) { /* modify control characters */ | |
319 | *p++ = '!'; | |
320 | *p++ = buf[i] + 'A'; | |
321 | continue; | |
322 | } | |
323 | } | |
324 | *p = '\0'; /* terminate the string */ | |
325 | ||
326 | if (sr_get_debug() > level) | |
327 | printf_unfiltered ("%s\n", newbuf); | |
328 | ||
329 | #ifdef LOG_FILE /* write to the monitor log */ | |
330 | if (log_file != 0x0) { | |
331 | fputs (newbuf, log_file); | |
332 | fputc ('\n', log_file); | |
333 | fflush (log_file); | |
334 | } | |
335 | #endif | |
336 | } | |
337 | ||
338 | /* readchar -- read a character from the remote system, doing all the fancy | |
339 | * timeout stuff. | |
340 | */ | |
341 | static int | |
342 | readchar(timeout) | |
343 | int timeout; | |
344 | { | |
345 | int c; | |
346 | ||
347 | c = SERIAL_READCHAR(array_desc, abs(timeout)); | |
348 | ||
349 | if (sr_get_debug() > 5) { | |
350 | putchar(c & 0x7f); | |
351 | debuglogs (5, "readchar: timeout = %d\n", timeout); | |
352 | } | |
353 | ||
354 | #ifdef LOG_FILE | |
355 | if (isascii (c)) | |
356 | putc(c & 0x7f, log_file); | |
357 | #endif | |
358 | ||
359 | if (c >= 0) | |
360 | return c & 0x7f; | |
361 | ||
362 | if (c == SERIAL_TIMEOUT) { | |
363 | if (timeout <= 0) | |
364 | return c; /* Polls shouldn't generate timeout errors */ | |
365 | error("Timeout reading from remote system."); | |
366 | #ifdef LOG_FILE | |
367 | fputs ("ERROR: Timeout reading from remote system", log_file); | |
368 | #endif | |
369 | } | |
370 | perror_with_name("readchar"); | |
371 | } | |
372 | ||
373 | /* | |
374 | * expect -- scan input from the remote system, until STRING is found. | |
375 | * If DISCARD is non-zero, then discard non-matching input, else print | |
376 | * it out. Let the user break out immediately. | |
377 | */ | |
378 | static void | |
379 | expect (string, discard) | |
380 | char *string; | |
381 | int discard; | |
382 | { | |
383 | char *p = string; | |
384 | int c; | |
385 | ||
386 | ||
387 | debuglogs (1, "Expecting \"%s\".", string); | |
388 | ||
389 | immediate_quit = 1; | |
390 | while (1) { | |
391 | c = readchar(timeout); | |
392 | if (!isascii (c)) | |
393 | continue; | |
394 | if (c == *p++) { | |
395 | if (*p == '\0') { | |
396 | immediate_quit = 0; | |
397 | debuglogs (4, "Matched"); | |
398 | return; | |
399 | } | |
400 | } else { | |
401 | if (!discard) { | |
402 | fputc_unfiltered (c, gdb_stdout); | |
403 | } | |
404 | p = string; | |
405 | } | |
406 | } | |
407 | } | |
408 | ||
409 | /* Keep discarding input until we see the MONITOR array_cmds->prompt. | |
410 | ||
411 | The convention for dealing with the expect_prompt is that you | |
412 | o give your command | |
413 | o *then* wait for the expect_prompt. | |
414 | ||
415 | Thus the last thing that a procedure does with the serial line | |
416 | will be an expect_prompt(). Exception: array_resume does not | |
417 | wait for the expect_prompt, because the terminal is being handed over | |
418 | to the inferior. However, the next thing which happens after that | |
419 | is a array_wait which does wait for the expect_prompt. | |
420 | Note that this includes abnormal exit, e.g. error(). This is | |
421 | necessary to prevent getting into states from which we can't | |
422 | recover. */ | |
423 | static void | |
424 | expect_prompt(discard) | |
425 | int discard; | |
426 | { | |
427 | expect (ARRAY_PROMPT, discard); | |
428 | } | |
429 | ||
430 | /* | |
431 | * junk -- ignore junk characters. Returns a 1 if junk, 0 otherwise | |
432 | */ | |
433 | static int | |
434 | junk(ch) | |
435 | char ch; | |
436 | { | |
437 | switch (ch) { | |
438 | case '\0': | |
439 | case ' ': | |
440 | case '-': | |
441 | case '\t': | |
442 | case '\r': | |
443 | case '\n': | |
444 | if (sr_get_debug() > 5) | |
445 | debuglogs (5, "Ignoring \'%c\'.", ch); | |
446 | return 1; | |
447 | default: | |
448 | if (sr_get_debug() > 5) | |
449 | debuglogs (5, "Accepting \'%c\'.", ch); | |
450 | return 0; | |
451 | } | |
452 | } | |
453 | ||
454 | /* | |
455 | * get_hex_digit -- Get a hex digit from the remote system & return its value. | |
456 | * If ignore is nonzero, ignore spaces, newline & tabs. | |
457 | */ | |
458 | static int | |
459 | get_hex_digit(ignore) | |
460 | int ignore; | |
461 | { | |
462 | static int ch; | |
463 | while (1) { | |
464 | ch = readchar(timeout); | |
465 | if (junk(ch)) | |
466 | continue; | |
467 | if (sr_get_debug() > 4) { | |
468 | debuglogs (4, "get_hex_digit() got a 0x%x(%c)", ch, ch); | |
469 | } else { | |
470 | #ifdef LOG_FILE /* write to the monitor log */ | |
471 | if (log_file != 0x0) { | |
472 | fputs ("get_hex_digit() got a 0x", log_file); | |
473 | fputc (ch, log_file); | |
474 | fputc ('\n', log_file); | |
475 | fflush (log_file); | |
476 | } | |
477 | #endif | |
478 | } | |
479 | ||
480 | if (ch >= '0' && ch <= '9') | |
481 | return ch - '0'; | |
482 | else if (ch >= 'A' && ch <= 'F') | |
483 | return ch - 'A' + 10; | |
484 | else if (ch >= 'a' && ch <= 'f') | |
485 | return ch - 'a' + 10; | |
486 | else if (ch == ' ' && ignore) | |
487 | ; | |
488 | else { | |
489 | expect_prompt(1); | |
490 | debuglogs (4, "Invalid hex digit from remote system. (0x%x)", ch); | |
491 | error("Invalid hex digit from remote system. (0x%x)", ch); | |
492 | } | |
493 | } | |
494 | } | |
495 | ||
496 | /* get_hex_byte -- Get a byte from monitor and put it in *BYT. | |
497 | * Accept any number leading spaces. | |
498 | */ | |
499 | static void | |
500 | get_hex_byte (byt) | |
501 | char *byt; | |
502 | { | |
503 | int val; | |
504 | ||
505 | val = get_hex_digit (1) << 4; | |
506 | debuglogs (4, "get_hex_byte() -- Read first nibble 0x%x", val); | |
507 | ||
508 | val |= get_hex_digit (0); | |
509 | debuglogs (4, "get_hex_byte() -- Read second nibble 0x%x", val); | |
510 | *byt = val; | |
511 | ||
512 | debuglogs (4, "get_hex_byte() -- Read a 0x%x", val); | |
513 | } | |
514 | ||
515 | /* | |
516 | * get_hex_word -- Get N 32-bit words from remote, each preceded by a space, | |
517 | * and put them in registers starting at REGNO. | |
518 | */ | |
519 | static int | |
520 | get_hex_word () | |
521 | { | |
522 | long val, newval; | |
523 | int i; | |
524 | ||
525 | val = 0; | |
526 | ||
527 | #if 0 | |
528 | if (HOST_BYTE_ORDER == BIG_ENDIAN) { | |
529 | #endif | |
530 | for (i = 0; i < 8; i++) | |
531 | val = (val << 4) + get_hex_digit (i == 0); | |
532 | #if 0 | |
533 | } else { | |
534 | for (i = 7; i >= 0; i--) | |
535 | val = (val << 4) + get_hex_digit (i == 0); | |
536 | } | |
537 | #endif | |
538 | ||
539 | debuglogs (4, "get_hex_word() got a 0x%x for a %s host.", val, (HOST_BYTE_ORDER == BIG_ENDIAN) ? "big endian" : "little endian"); | |
540 | ||
541 | return val; | |
542 | } | |
543 | ||
544 | /* This is called not only when we first attach, but also when the | |
545 | user types "run" after having attached. */ | |
546 | static void | |
547 | array_create_inferior (execfile, args, env) | |
548 | char *execfile; | |
549 | char *args; | |
550 | char **env; | |
551 | { | |
552 | int entry_pt; | |
553 | ||
554 | if (args && *args) | |
555 | error("Can't pass arguments to remote MONITOR process"); | |
556 | ||
557 | if (execfile == 0 || exec_bfd == 0) | |
558 | error("No executable file specified"); | |
559 | ||
560 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
561 | ||
562 | /* The "process" (board) is already stopped awaiting our commands, and | |
563 | the program is already downloaded. We just set its PC and go. */ | |
564 | ||
565 | clear_proceed_status (); | |
566 | ||
567 | /* Tell wait_for_inferior that we've started a new process. */ | |
568 | init_wait_for_inferior (); | |
569 | ||
570 | /* Set up the "saved terminal modes" of the inferior | |
571 | based on what modes we are starting it with. */ | |
572 | target_terminal_init (); | |
573 | ||
574 | /* Install inferior's terminal modes. */ | |
575 | target_terminal_inferior (); | |
576 | ||
577 | /* insert_step_breakpoint (); FIXME, do we need this? */ | |
578 | ||
579 | /* Let 'er rip... */ | |
580 | proceed ((CORE_ADDR)entry_pt, TARGET_SIGNAL_DEFAULT, 0); | |
581 | } | |
582 | ||
583 | /* | |
584 | * array_open -- open a connection to a remote debugger. | |
585 | * NAME is the filename used for communication. | |
586 | */ | |
587 | static int baudrate = 9600; | |
588 | static char dev_name[100]; | |
589 | ||
590 | static void | |
591 | array_open(args, name, from_tty) | |
592 | char *args; | |
593 | char *name; | |
594 | int from_tty; | |
595 | { | |
596 | char packet[PBUFSIZ]; | |
597 | ||
598 | if (args == NULL) | |
599 | error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\ | |
600 | `target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name, name); | |
601 | ||
602 | /* if (is_open) */ | |
603 | array_close(0); | |
604 | ||
605 | target_preopen (from_tty); | |
606 | unpush_target (&array_ops); | |
607 | ||
608 | tmp_mips_processor_type = "lsi33k"; /* change the default from r3051 */ | |
609 | mips_set_processor_type_command ("lsi33k", 0); | |
610 | ||
611 | strcpy(dev_name, args); | |
612 | array_desc = SERIAL_OPEN(dev_name); | |
613 | ||
614 | if (array_desc == NULL) | |
615 | perror_with_name(dev_name); | |
616 | ||
617 | if (baud_rate != -1) { | |
618 | if (SERIAL_SETBAUDRATE (array_desc, baud_rate)) { | |
619 | SERIAL_CLOSE (array_desc); | |
620 | perror_with_name (name); | |
621 | } | |
622 | } | |
623 | ||
624 | SERIAL_RAW(array_desc); | |
625 | ||
626 | #if defined (LOG_FILE) | |
627 | log_file = fopen (LOG_FILE, "w"); | |
628 | if (log_file == NULL) | |
629 | perror_with_name (LOG_FILE); | |
630 | fprintf (log_file, "GDB %s (%s", version); | |
631 | fprintf (log_file, " --target %s)\n", array_ops.to_shortname); | |
632 | fprintf (log_file, "Remote target %s connected to %s\n\n", array_ops.to_shortname, dev_name); | |
633 | #endif | |
634 | ||
635 | /* see if the target is alive. For a ROM monitor, we can just try to force the | |
636 | expect_prompt to print a few times. For the GDB remote protocol, the application | |
637 | being debugged is sitting at a breakpoint and waiting for GDB to initialize | |
638 | the connection. We force it to give us an empty packet to see if it's alive. | |
639 | */ | |
640 | debuglogs (3, "Trying to ACK the target's debug stub"); | |
641 | /* unless your are on the new hardware, the old board won't initialize | |
642 | because the '@' doesn't flush output like it does on the new ROMS. | |
643 | */ | |
644 | printf_monitor ("@"); /* ask for the last signal */ | |
645 | expect_prompt(1); /* See if we get a expect_prompt */ | |
646 | #ifdef TEST_ARRAY /* skip packet for testing */ | |
647 | make_gdb_packet (packet, "?"); /* ask for a bogus packet */ | |
648 | if (array_send_packet (packet) == 0) | |
649 | error ("Couldn't transmit packet\n"); | |
650 | printf_monitor ("@\n"); /* force it to flush stdout */ | |
651 | expect_prompt(1); /* See if we get a expect_prompt */ | |
652 | #endif | |
653 | push_target (&array_ops); | |
654 | if (from_tty) | |
655 | printf("Remote target %s connected to %s\n", array_ops.to_shortname, dev_name); | |
656 | } | |
657 | ||
658 | /* | |
659 | * array_close -- Close out all files and local state before this | |
660 | * target loses control. | |
661 | */ | |
662 | ||
663 | static void | |
664 | array_close (quitting) | |
665 | int quitting; | |
666 | { | |
667 | SERIAL_CLOSE(array_desc); | |
668 | array_desc = NULL; | |
669 | ||
670 | debuglogs (1, "array_close (quitting=%d)", quitting); | |
671 | ||
672 | #if defined (LOG_FILE) | |
673 | if (log_file) { | |
674 | if (ferror(log_file)) | |
675 | printf_filtered ("Error writing log file.\n"); | |
676 | if (fclose(log_file) != 0) | |
677 | printf_filtered ("Error closing log file.\n"); | |
678 | } | |
679 | #endif | |
680 | } | |
681 | ||
682 | /* | |
683 | * array_detach -- terminate the open connection to the remote | |
684 | * debugger. Use this when you want to detach and do something | |
685 | * else with your gdb. | |
686 | */ | |
687 | static void | |
688 | array_detach (from_tty) | |
689 | int from_tty; | |
690 | { | |
691 | ||
692 | debuglogs (1, "array_detach ()"); | |
693 | ||
694 | pop_target(); /* calls array_close to do the real work */ | |
695 | if (from_tty) | |
696 | printf ("Ending remote %s debugging\n", target_shortname); | |
697 | } | |
698 | ||
699 | /* | |
700 | * array_attach -- attach GDB to the target. | |
701 | */ | |
702 | static void | |
703 | array_attach (args, from_tty) | |
704 | char *args; | |
705 | int from_tty; | |
706 | { | |
707 | if (from_tty) | |
708 | printf ("Starting remote %s debugging\n", target_shortname); | |
709 | ||
710 | debuglogs (1, "array_attach (args=%s)", args); | |
711 | ||
712 | printf_monitor ("go %x\n"); | |
713 | /* swallow the echo. */ | |
714 | expect ("go %x\n", 1); | |
715 | } | |
716 | ||
717 | /* | |
718 | * array_resume -- Tell the remote machine to resume. | |
719 | */ | |
720 | static void | |
721 | array_resume (pid, step, sig) | |
722 | int pid, step; | |
723 | enum target_signal sig; | |
724 | { | |
725 | debuglogs (1, "array_resume (step=%d, sig=%d)", step, sig); | |
726 | ||
727 | if (step) { | |
728 | printf_monitor ("s\n"); | |
729 | } else { | |
730 | printf_monitor ("go\n"); | |
731 | } | |
732 | } | |
733 | ||
734 | #define TMPBUFSIZ 5 | |
735 | ||
736 | /* | |
737 | * array_wait -- Wait until the remote machine stops, then return, | |
738 | * storing status in status just as `wait' would. | |
739 | */ | |
740 | static int | |
741 | array_wait (pid, status) | |
742 | int pid; | |
743 | struct target_waitstatus *status; | |
744 | { | |
745 | int old_timeout = timeout; | |
746 | int result, i; | |
747 | char c; | |
748 | serial_t tty_desc; | |
749 | serial_ttystate ttystate; | |
750 | ||
751 | debuglogs(1, "array_wait (), printing extraneous text."); | |
752 | ||
753 | status->kind = TARGET_WAITKIND_EXITED; | |
754 | status->value.integer = 0; | |
755 | ||
756 | timeout = 0; /* Don't time out -- user program is running. */ | |
757 | ||
758 | #if !defined(__GO32__) && !defined(__MSDOS__) && !defined(_WIN32) | |
759 | tty_desc = SERIAL_FDOPEN (0); | |
760 | ttystate = SERIAL_GET_TTY_STATE (tty_desc); | |
761 | SERIAL_RAW (tty_desc); | |
762 | ||
763 | i = 0; | |
764 | /* poll on the serial port and the keyboard. */ | |
765 | while (1) { | |
766 | c = readchar(timeout); | |
767 | if (c > 0) { | |
768 | if (c == *(ARRAY_PROMPT + i)) { | |
769 | if (++i >= strlen (ARRAY_PROMPT)) { /* matched the prompt */ | |
770 | debuglogs (4, "array_wait(), got the expect_prompt."); | |
771 | break; | |
772 | } | |
773 | } else { /* not the prompt */ | |
774 | i = 0; | |
775 | } | |
776 | fputc_unfiltered (c, gdb_stdout); | |
777 | gdb_flush (gdb_stdout); | |
778 | } | |
779 | c = SERIAL_READCHAR(tty_desc, timeout); | |
780 | if (c > 0) { | |
781 | SERIAL_WRITE(array_desc, &c, 1); | |
782 | /* do this so it looks like there's keyboard echo */ | |
783 | if (c == 3) /* exit on Control-C */ | |
784 | break; | |
785 | #if 0 | |
786 | fputc_unfiltered (c, gdb_stdout); | |
787 | gdb_flush (gdb_stdout); | |
788 | #endif | |
789 | } | |
790 | } | |
791 | SERIAL_SET_TTY_STATE (tty_desc, ttystate); | |
792 | #else | |
793 | expect_prompt(1); | |
794 | debuglogs (4, "array_wait(), got the expect_prompt."); | |
795 | #endif | |
796 | ||
797 | status->kind = TARGET_WAITKIND_STOPPED; | |
798 | status->value.sig = TARGET_SIGNAL_TRAP; | |
799 | ||
800 | timeout = old_timeout; | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
805 | /* | |
806 | * array_fetch_registers -- read the remote registers into the | |
807 | * block regs. | |
808 | */ | |
809 | static void | |
810 | array_fetch_registers (ignored) | |
811 | int ignored; | |
812 | { | |
813 | int regno, i; | |
814 | char *p; | |
815 | unsigned char packet[PBUFSIZ]; | |
816 | char regs[REGISTER_BYTES]; | |
817 | ||
818 | debuglogs (1, "array_fetch_registers (ignored=%d)\n", ignored); | |
819 | ||
820 | memset (packet, 0, PBUFSIZ); | |
821 | /* Unimplemented registers read as all bits zero. */ | |
822 | memset (regs, 0, REGISTER_BYTES); | |
823 | make_gdb_packet (packet, "g"); | |
824 | if (array_send_packet (packet) == 0) | |
825 | error ("Couldn't transmit packet\n"); | |
826 | if (array_get_packet (packet) == 0) | |
827 | error ("Couldn't receive packet\n"); | |
828 | /* FIXME: read bytes from packet */ | |
829 | debuglogs (4, "array_fetch_registers: Got a \"%s\" back\n", packet); | |
830 | for (regno = 0; regno <= PC_REGNUM+4; regno++) { | |
831 | /* supply register stores in target byte order, so swap here */ | |
832 | /* FIXME: convert from ASCII hex to raw bytes */ | |
833 | i = ascii2hexword (packet + (regno * 8)); | |
834 | debuglogs (5, "Adding register %d = %x\n", regno, i); | |
835 | SWAP_TARGET_AND_HOST (&i, 4); | |
836 | supply_register (regno, (char *)&i); | |
837 | } | |
838 | } | |
839 | ||
840 | /* | |
841 | * This is unused by targets like this one that use a | |
842 | * protocol based on GDB's remote protocol. | |
843 | */ | |
844 | static void | |
845 | array_fetch_register (ignored) | |
846 | int ignored; | |
847 | { | |
848 | array_fetch_registers (); | |
849 | } | |
850 | ||
851 | /* | |
852 | * Get all the registers from the targets. They come back in a large array. | |
853 | */ | |
854 | static void | |
855 | array_store_registers (ignored) | |
856 | int ignored; | |
857 | { | |
858 | int regno; | |
859 | unsigned long i; | |
860 | char packet[PBUFSIZ]; | |
861 | char buf[PBUFSIZ]; | |
862 | char num[9]; | |
863 | ||
864 | debuglogs (1, "array_store_registers()"); | |
865 | ||
866 | memset (packet, 0, PBUFSIZ); | |
867 | memset (buf, 0, PBUFSIZ); | |
868 | buf[0] = 'G'; | |
869 | ||
870 | /* Unimplemented registers read as all bits zero. */ | |
871 | /* FIXME: read bytes from packet */ | |
872 | for (regno = 0; regno < 41; regno++) { /* FIXME */ | |
873 | /* supply register stores in target byte order, so swap here */ | |
874 | /* FIXME: convert from ASCII hex to raw bytes */ | |
875 | i = (unsigned long)read_register (regno); | |
876 | hexword2ascii (num, i); | |
877 | strcpy (buf+(regno * 8)+1, num); | |
878 | } | |
879 | *(buf + (regno * 8) + 2) = 0; | |
880 | make_gdb_packet (packet, buf); | |
881 | if (array_send_packet (packet) == 0) | |
882 | error ("Couldn't transmit packet\n"); | |
883 | if (array_get_packet (packet) == 0) | |
884 | error ("Couldn't receive packet\n"); | |
885 | ||
886 | registers_changed (); | |
887 | } | |
888 | ||
889 | /* | |
890 | * This is unused by targets like this one that use a | |
891 | * protocol based on GDB's remote protocol. | |
892 | */ | |
893 | static void | |
894 | array_store_register (ignored) | |
895 | int ignored; | |
896 | { | |
897 | array_store_registers (); | |
898 | } | |
899 | ||
900 | /* Get ready to modify the registers array. On machines which store | |
901 | individual registers, this doesn't need to do anything. On machines | |
902 | which store all the registers in one fell swoop, this makes sure | |
903 | that registers contains all the registers from the program being | |
904 | debugged. */ | |
905 | ||
906 | static void | |
907 | array_prepare_to_store () | |
908 | { | |
909 | /* Do nothing, since we can store individual regs */ | |
910 | } | |
911 | ||
912 | static void | |
913 | array_files_info () | |
914 | { | |
915 | printf ("\tAttached to %s at %d baud.\n", | |
916 | dev_name, baudrate); | |
917 | } | |
918 | ||
919 | /* | |
920 | * array_write_inferior_memory -- Copy LEN bytes of data from debugger | |
921 | * memory at MYADDR to inferior's memory at MEMADDR. Returns length moved. | |
922 | */ | |
923 | static int | |
924 | array_write_inferior_memory (memaddr, myaddr, len) | |
925 | CORE_ADDR memaddr; | |
926 | unsigned char *myaddr; | |
927 | int len; | |
928 | { | |
929 | unsigned long i; | |
930 | int j; | |
931 | char packet[PBUFSIZ]; | |
932 | char buf[PBUFSIZ]; | |
933 | char num[9]; | |
934 | char *p; | |
935 | ||
936 | debuglogs (1, "array_write_inferior_memory (memaddr=0x%x, myaddr=0x%x, len=%d)", memaddr, myaddr, len); | |
937 | memset (buf, '\0', PBUFSIZ); /* this also sets the string terminator */ | |
938 | p = buf; | |
939 | ||
940 | *p++ = 'M'; /* The command to write memory */ | |
941 | hexword2ascii (num, memaddr); /* convert the address */ | |
942 | strcpy (p, num); /* copy the address */ | |
943 | p += 8; | |
944 | *p++ = ','; /* add comma delimeter */ | |
945 | hexword2ascii (num, len); /* Get the length as a 4 digit number */ | |
946 | *p++ = num[4]; | |
947 | *p++ = num[5]; | |
948 | *p++ = num[6]; | |
949 | *p++ = num[7]; | |
950 | *p++ = ':'; /* add the colon delimeter */ | |
951 | for (j = 0; j < len; j++) { /* copy the data in after converting it */ | |
952 | *p++ = tohex ((myaddr[j] >> 4) & 0xf); | |
953 | *p++ = tohex (myaddr[j] & 0xf); | |
954 | } | |
955 | ||
956 | make_gdb_packet (packet, buf); | |
957 | if (array_send_packet (packet) == 0) | |
958 | error ("Couldn't transmit packet\n"); | |
959 | if (array_get_packet (packet) == 0) | |
960 | error ("Couldn't receive packet\n"); | |
961 | ||
962 | return len; | |
963 | } | |
964 | ||
965 | /* | |
966 | * array_read_inferior_memory -- read LEN bytes from inferior memory | |
967 | * at MEMADDR. Put the result at debugger address MYADDR. Returns | |
968 | * length moved. | |
969 | */ | |
970 | static int | |
971 | array_read_inferior_memory(memaddr, myaddr, len) | |
972 | CORE_ADDR memaddr; | |
973 | char *myaddr; | |
974 | int len; | |
975 | { | |
976 | int j; | |
977 | char buf[20]; | |
978 | char packet[PBUFSIZ]; | |
979 | int count; /* Number of bytes read so far. */ | |
980 | unsigned long startaddr; /* Starting address of this pass. */ | |
981 | int len_this_pass; /* Number of bytes to read in this pass. */ | |
982 | ||
983 | debuglogs (1, "array_read_inferior_memory (memaddr=0x%x, myaddr=0x%x, len=%d)", memaddr, myaddr, len); | |
984 | ||
985 | /* Note that this code works correctly if startaddr is just less | |
986 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
987 | thing). That is, something like | |
988 | array_read_bytes (CORE_ADDR_MAX - 4, foo, 4) | |
989 | works--it never adds len To memaddr and gets 0. */ | |
990 | /* However, something like | |
991 | array_read_bytes (CORE_ADDR_MAX - 3, foo, 4) | |
992 | doesn't need to work. Detect it and give up if there's an attempt | |
993 | to do that. */ | |
994 | if (((memaddr - 1) + len) < memaddr) { | |
995 | errno = EIO; | |
996 | return 0; | |
997 | } | |
998 | ||
999 | for (count = 0, startaddr = memaddr; count < len; startaddr += len_this_pass) | |
1000 | { | |
1001 | /* Try to align to 16 byte boundry (why?) */ | |
1002 | len_this_pass = 16; | |
1003 | if ((startaddr % 16) != 0) | |
1004 | { | |
1005 | len_this_pass -= startaddr % 16; | |
1006 | } | |
1007 | /* Only transfer bytes we need */ | |
1008 | if (len_this_pass > (len - count)) | |
1009 | { | |
1010 | len_this_pass = (len - count); | |
1011 | } | |
1012 | /* Fetch the bytes */ | |
1013 | debuglogs (3, "read %d bytes from inferior address %x", len_this_pass, | |
1014 | startaddr); | |
1015 | sprintf (buf, "m%08x,%04x", startaddr, len_this_pass); | |
1016 | make_gdb_packet (packet, buf); | |
1017 | if (array_send_packet (packet) == 0) | |
1018 | { | |
1019 | error ("Couldn't transmit packet\n"); | |
1020 | } | |
1021 | if (array_get_packet (packet) == 0) | |
1022 | { | |
1023 | error ("Couldn't receive packet\n"); | |
1024 | } | |
1025 | if (*packet == 0) | |
1026 | { | |
1027 | error ("Got no data in the GDB packet\n"); | |
1028 | } | |
1029 | /* Pick packet apart and xfer bytes to myaddr */ | |
1030 | debuglogs (4, "array_read_inferior_memory: Got a \"%s\" back\n", packet); | |
1031 | for (j = 0; j < len_this_pass ; j++) | |
1032 | { | |
1033 | /* extract the byte values */ | |
1034 | myaddr[count++] = from_hex (*(packet+(j*2))) * 16 + from_hex (*(packet+(j*2)+1)); | |
1035 | debuglogs (5, "myaddr[%d] set to %x\n", count-1, myaddr[count-1]); | |
1036 | } | |
1037 | } | |
1038 | return (count); | |
1039 | } | |
1040 | ||
1041 | /* FIXME-someday! merge these two. */ | |
1042 | static int | |
1043 | array_xfer_memory (memaddr, myaddr, len, write, target) | |
1044 | CORE_ADDR memaddr; | |
1045 | char *myaddr; | |
1046 | int len; | |
1047 | int write; | |
1048 | struct target_ops *target; /* ignored */ | |
1049 | { | |
1050 | if (write) | |
1051 | return array_write_inferior_memory (memaddr, myaddr, len); | |
1052 | else | |
1053 | return array_read_inferior_memory (memaddr, myaddr, len); | |
1054 | } | |
1055 | ||
1056 | static void | |
1057 | array_kill (args, from_tty) | |
1058 | char *args; | |
1059 | int from_tty; | |
1060 | { | |
1061 | return; /* ignore attempts to kill target system */ | |
1062 | } | |
1063 | ||
1064 | /* Clean up when a program exits. | |
1065 | The program actually lives on in the remote processor's RAM, and may be | |
1066 | run again without a download. Don't leave it full of breakpoint | |
1067 | instructions. */ | |
1068 | ||
1069 | static void | |
1070 | array_mourn_inferior () | |
1071 | { | |
1072 | remove_breakpoints (); | |
1073 | generic_mourn_inferior (); /* Do all the proper things now */ | |
1074 | } | |
1075 | ||
1076 | #define MAX_ARRAY_BREAKPOINTS 16 | |
1077 | ||
1078 | static CORE_ADDR breakaddr[MAX_ARRAY_BREAKPOINTS] = {0}; | |
1079 | ||
1080 | /* | |
1081 | * array_insert_breakpoint -- add a breakpoint | |
1082 | */ | |
1083 | static int | |
1084 | array_insert_breakpoint (addr, shadow) | |
1085 | CORE_ADDR addr; | |
1086 | char *shadow; | |
1087 | { | |
1088 | int i; | |
1089 | int bp_size = 0; | |
1090 | CORE_ADDR bp_addr = addr; | |
1091 | ||
1092 | debuglogs (1, "array_insert_breakpoint() addr = 0x%x", addr); | |
1093 | BREAKPOINT_FROM_PC (&bp_addr, &bp_size); | |
1094 | ||
1095 | for (i = 0; i <= MAX_ARRAY_BREAKPOINTS; i++) { | |
1096 | if (breakaddr[i] == 0) { | |
1097 | breakaddr[i] = addr; | |
1098 | if (sr_get_debug() > 4) | |
1099 | printf ("Breakpoint at %x\n", addr); | |
1100 | array_read_inferior_memory (bp_addr, shadow, bp_size); | |
1101 | printf_monitor("b 0x%x\n", addr); | |
1102 | expect_prompt(1); | |
1103 | return 0; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | fprintf(stderr, "Too many breakpoints (> 16) for monitor\n"); | |
1108 | return 1; | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * _remove_breakpoint -- Tell the monitor to remove a breakpoint | |
1113 | */ | |
1114 | static int | |
1115 | array_remove_breakpoint (addr, shadow) | |
1116 | CORE_ADDR addr; | |
1117 | char *shadow; | |
1118 | { | |
1119 | int i; | |
1120 | ||
1121 | debuglogs (1, "array_remove_breakpoint() addr = 0x%x", addr); | |
1122 | ||
1123 | for (i = 0; i < MAX_ARRAY_BREAKPOINTS; i++) { | |
1124 | if (breakaddr[i] == addr) { | |
1125 | breakaddr[i] = 0; | |
1126 | /* some monitors remove breakpoints based on the address */ | |
1127 | printf_monitor("bd %x\n", i); | |
1128 | expect_prompt(1); | |
1129 | return 0; | |
1130 | } | |
1131 | } | |
1132 | fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr); | |
1133 | return 1; | |
1134 | } | |
1135 | ||
1136 | static void | |
1137 | array_stop () | |
1138 | { | |
1139 | debuglogs (1, "array_stop()"); | |
1140 | printf_monitor("\003"); | |
1141 | expect_prompt(1); | |
1142 | } | |
1143 | ||
1144 | /* | |
1145 | * array_command -- put a command string, in args, out to MONITOR. | |
1146 | * Output from MONITOR is placed on the users terminal until the | |
1147 | * expect_prompt is seen. FIXME | |
1148 | */ | |
1149 | static void | |
1150 | monitor_command (args, fromtty) | |
1151 | char *args; | |
1152 | int fromtty; | |
1153 | { | |
1154 | debuglogs (1, "monitor_command (args=%s)", args); | |
1155 | ||
1156 | if (array_desc == NULL) | |
1157 | error("monitor target not open."); | |
1158 | ||
1159 | if (!args) | |
1160 | error("Missing command."); | |
1161 | ||
1162 | printf_monitor ("%s\n", args); | |
1163 | expect_prompt(0); | |
1164 | } | |
1165 | ||
1166 | /* | |
1167 | * make_gdb_packet -- make a GDB packet. The data is always ASCII. | |
1168 | * A debug packet whose contents are <data> | |
1169 | * is encapsulated for transmission in the form: | |
1170 | * | |
1171 | * $ <data> # CSUM1 CSUM2 | |
1172 | * | |
1173 | * <data> must be ASCII alphanumeric and cannot include characters | |
1174 | * '$' or '#'. If <data> starts with two characters followed by | |
1175 | * ':', then the existing stubs interpret this as a sequence number. | |
1176 | * | |
1177 | * CSUM1 and CSUM2 are ascii hex representation of an 8-bit | |
1178 | * checksum of <data>, the most significant nibble is sent first. | |
1179 | * the hex digits 0-9,a-f are used. | |
1180 | * | |
1181 | */ | |
1182 | static void | |
1183 | make_gdb_packet (buf, data) | |
1184 | char *buf, *data; | |
1185 | { | |
1186 | int i; | |
1187 | unsigned char csum = 0; | |
1188 | int cnt; | |
1189 | char *p; | |
1190 | ||
1191 | debuglogs (3, "make_gdb_packet(%s)\n", data); | |
1192 | cnt = strlen (data); | |
1193 | if (cnt > PBUFSIZ) | |
1194 | error ("make_gdb_packet(): to much data\n"); | |
1195 | ||
1196 | /* start with the packet header */ | |
1197 | p = buf; | |
1198 | *p++ = '$'; | |
1199 | ||
1200 | /* calculate the checksum */ | |
1201 | for (i = 0; i < cnt; i++) { | |
1202 | csum += data[i]; | |
1203 | *p++ = data[i]; | |
1204 | } | |
1205 | ||
1206 | /* terminate the data with a '#' */ | |
1207 | *p++ = '#'; | |
1208 | ||
1209 | /* add the checksum as two ascii digits */ | |
1210 | *p++ = tohex ((csum >> 4) & 0xf); | |
1211 | *p++ = tohex (csum & 0xf); | |
1212 | *p = 0x0; /* Null terminator on string */ | |
1213 | } | |
1214 | ||
1215 | /* | |
1216 | * array_send_packet -- send a GDB packet to the target with error handling. We | |
1217 | * get a '+' (ACK) back if the packet is received and the checksum | |
1218 | * matches. Otherwise a '-' (NAK) is returned. It returns a 1 for a | |
1219 | * successful transmition, or a 0 for a failure. | |
1220 | */ | |
1221 | static int | |
1222 | array_send_packet (packet) | |
1223 | char *packet; | |
1224 | { | |
1225 | int c, retries, i; | |
1226 | char junk[PBUFSIZ]; | |
1227 | ||
1228 | retries = 0; | |
1229 | ||
1230 | #if 0 | |
1231 | /* scan the packet to make sure it only contains valid characters. | |
1232 | this may sound silly, but sometimes a garbled packet will hang | |
1233 | the target board. We scan the whole thing, then print the error | |
1234 | message. | |
1235 | */ | |
1236 | for (i = 0; i < strlen(packet); i++) { | |
1237 | debuglogs (5, "array_send_packet(): Scanning \'%c\'\n", packet[i]); | |
1238 | /* legit hex numbers or command */ | |
1239 | if ((isxdigit(packet[i])) || (isalpha(packet[i]))) | |
1240 | continue; | |
1241 | switch (packet[i]) { | |
1242 | case '+': /* ACK */ | |
1243 | case '-': /* NAK */ | |
1244 | case '#': /* end of packet */ | |
1245 | case '$': /* start of packet */ | |
1246 | continue; | |
1247 | default: /* bogus character */ | |
1248 | retries++; | |
1249 | debuglogs (4, "array_send_packet(): Found a non-ascii digit \'%c\' in the packet.\n", packet[i]); | |
1250 | } | |
1251 | } | |
1252 | #endif | |
1253 | ||
1254 | if (retries > 0) | |
1255 | error ("Can't send packet, found %d non-ascii characters", retries); | |
1256 | ||
1257 | /* ok, try to send the packet */ | |
1258 | retries = 0; | |
1259 | while (retries++ <= 10) { | |
1260 | printf_monitor ("%s", packet); | |
1261 | ||
1262 | /* read until either a timeout occurs (-2) or '+' is read */ | |
1263 | while (retries <= 10) { | |
1264 | c = readchar (-timeout); | |
1265 | debuglogs (3, "Reading a GDB protocol packet... Got a '%c'\n", c); | |
1266 | switch (c) { | |
1267 | case '+': | |
1268 | debuglogs (3, "Got Ack\n"); | |
1269 | return 1; | |
1270 | case SERIAL_TIMEOUT: | |
1271 | debuglogs (3, "Timed out reading serial port\n"); | |
1272 | printf_monitor("@"); /* resync with the monitor */ | |
1273 | expect_prompt(1); /* See if we get a expect_prompt */ | |
1274 | break; /* Retransmit buffer */ | |
1275 | case '-': | |
1276 | debuglogs (3, "Got NAK\n"); | |
1277 | printf_monitor("@"); /* resync with the monitor */ | |
1278 | expect_prompt(1); /* See if we get a expect_prompt */ | |
1279 | break; | |
1280 | case '$': | |
1281 | /* it's probably an old response, or the echo of our command. | |
1282 | * just gobble up the packet and ignore it. | |
1283 | */ | |
1284 | debuglogs (3, "Got a junk packet\n"); | |
1285 | i = 0; | |
1286 | do { | |
1287 | c = readchar (timeout); | |
1288 | junk[i++] = c; | |
1289 | } while (c != '#'); | |
1290 | c = readchar (timeout); | |
1291 | junk[i++] = c; | |
1292 | c = readchar (timeout); | |
1293 | junk[i++] = c; | |
1294 | junk[i++] = '\0'; | |
1295 | debuglogs (3, "Reading a junk packet, got a \"%s\"\n", junk); | |
1296 | continue; /* Now, go look for next packet */ | |
1297 | default: | |
1298 | continue; | |
1299 | } | |
1300 | retries++; | |
1301 | debuglogs (3, "Retransmitting packet \"%s\"\n", packet); | |
1302 | break; /* Here to retransmit */ | |
1303 | } | |
1304 | } /* outer while */ | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | /* | |
1309 | * array_get_packet -- get a GDB packet from the target. Basically we read till we | |
1310 | * see a '#', then check the checksum. It returns a 1 if it's gotten a | |
1311 | * packet, or a 0 it the packet wasn't transmitted correctly. | |
1312 | */ | |
1313 | static int | |
1314 | array_get_packet (packet) | |
1315 | char *packet; | |
1316 | { | |
1317 | int c; | |
1318 | int retries; | |
1319 | unsigned char csum; | |
1320 | unsigned char pktcsum; | |
1321 | char *bp; | |
1322 | ||
1323 | csum = 0; | |
1324 | bp = packet; | |
1325 | ||
1326 | memset (packet, 1, PBUFSIZ); | |
1327 | retries = 0; | |
1328 | while (retries <= 10) { | |
1329 | do { | |
1330 | c = readchar (timeout); | |
1331 | if (c == SERIAL_TIMEOUT) { | |
1332 | debuglogs (3, "array_get_packet: got time out from serial port.\n"); | |
1333 | } | |
1334 | debuglogs (3, "Waiting for a '$', got a %c\n", c); | |
1335 | } while (c != '$'); | |
1336 | ||
1337 | retries = 0; | |
1338 | while (retries <= 10) { | |
1339 | c = readchar (timeout); | |
1340 | debuglogs (3, "array_get_packet: got a '%c'\n", c); | |
1341 | switch (c) { | |
1342 | case SERIAL_TIMEOUT: | |
1343 | debuglogs (3, "Timeout in mid-packet, retrying\n"); | |
1344 | return 0; | |
1345 | case '$': | |
1346 | debuglogs (3, "Saw new packet start in middle of old one\n"); | |
1347 | return 0; /* Start a new packet, count retries */ | |
1348 | case '#': | |
1349 | *bp = '\0'; | |
1350 | pktcsum = from_hex (readchar (timeout)) << 4; | |
1351 | pktcsum |= from_hex (readchar (timeout)); | |
1352 | if (csum == 0) | |
1353 | debuglogs (3, "\nGDB packet checksum zero, must be a bogus packet\n"); | |
1354 | if (csum == pktcsum) { | |
1355 | debuglogs (3, "\nGDB packet checksum correct, packet data is \"%s\",\n", packet); | |
1356 | printf_monitor ("@"); | |
1357 | expect_prompt (1); | |
1358 | return 1; | |
1359 | } | |
1360 | debuglogs (3, "Bad checksum, sentsum=0x%x, csum=0x%x\n", pktcsum, csum); | |
1361 | return 0; | |
1362 | case '*': /* Run length encoding */ | |
1363 | debuglogs (5, "Run length encoding in packet\n"); | |
1364 | csum += c; | |
1365 | c = readchar (timeout); | |
1366 | csum += c; | |
1367 | c = c - ' ' + 3; /* Compute repeat count */ | |
1368 | ||
1369 | if (c > 0 && c < 255 && bp + c - 1 < packet + PBUFSIZ - 1) { | |
1370 | memset (bp, *(bp - 1), c); | |
1371 | bp += c; | |
1372 | continue; | |
1373 | } | |
1374 | *bp = '\0'; | |
1375 | printf_filtered ("Repeat count %d too large for buffer.\n", c); | |
1376 | return 0; | |
1377 | ||
1378 | default: | |
1379 | if ((!isxdigit(c)) && (!ispunct(c))) | |
1380 | debuglogs (4, "Got a non-ascii digit \'%c\'.\\n", c); | |
1381 | if (bp < packet + PBUFSIZ - 1) { | |
1382 | *bp++ = c; | |
1383 | csum += c; | |
1384 | continue; | |
1385 | } | |
1386 | ||
1387 | *bp = '\0'; | |
1388 | puts_filtered ("Remote packet too long.\n"); | |
1389 | return 0; | |
1390 | } | |
1391 | } | |
1392 | } | |
1393 | return 0; /* exceeded retries */ | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * ascii2hexword -- convert an ascii number represented by 8 digits to a hex value. | |
1398 | */ | |
1399 | static unsigned long | |
1400 | ascii2hexword (mem) | |
1401 | unsigned char *mem; | |
1402 | { | |
1403 | unsigned long val; | |
1404 | int i; | |
1405 | char buf[9]; | |
1406 | ||
1407 | val = 0; | |
1408 | for (i = 0; i < 8; i++) { | |
1409 | val <<= 4; | |
1410 | if (mem[i] >= 'A' && mem[i] <= 'F') | |
1411 | val = val + mem[i] - 'A' + 10; | |
1412 | if (mem[i] >= 'a' && mem[i] <= 'f') | |
1413 | val = val + mem[i] - 'a' + 10; | |
1414 | if (mem[i] >= '0' && mem[i] <= '9') | |
1415 | val = val + mem[i] - '0'; | |
1416 | buf[i] = mem[i]; | |
1417 | } | |
1418 | buf[8] = '\0'; | |
1419 | debuglogs (4, "ascii2hexword() got a 0x%x from %s(%x).\n", val, buf, mem); | |
1420 | return val; | |
1421 | } | |
1422 | ||
1423 | /* | |
1424 | * ascii2hexword -- convert a hex value to an ascii number represented by 8 | |
1425 | * digits. | |
1426 | */ | |
1427 | static void | |
1428 | hexword2ascii (mem, num) | |
1429 | unsigned char *mem; | |
1430 | unsigned long num; | |
1431 | { | |
1432 | int i; | |
1433 | unsigned char ch; | |
1434 | ||
1435 | debuglogs (4, "hexword2ascii() converting %x ", num); | |
1436 | for (i = 7; i >= 0; i--) { | |
1437 | mem[i] = tohex ((num >> 4) & 0xf); | |
1438 | mem[i] = tohex (num & 0xf); | |
1439 | num = num >> 4; | |
1440 | } | |
1441 | mem[8] = '\0'; | |
1442 | debuglogs (4, "\tto a %s", mem); | |
1443 | } | |
1444 | ||
1445 | /* Convert hex digit A to a number. */ | |
1446 | static int | |
1447 | from_hex (a) | |
1448 | int a; | |
1449 | { | |
1450 | if (a == 0) | |
1451 | return 0; | |
1452 | ||
1453 | debuglogs (4, "from_hex got a 0x%x(%c)\n",a,a); | |
1454 | if (a >= '0' && a <= '9') | |
1455 | return a - '0'; | |
1456 | if (a >= 'a' && a <= 'f') | |
1457 | return a - 'a' + 10; | |
1458 | if (a >= 'A' && a <= 'F') | |
1459 | return a - 'A' + 10; | |
1460 | else { | |
1461 | error ("Reply contains invalid hex digit 0x%x", a); | |
1462 | } | |
1463 | } | |
1464 | ||
1465 | /* Convert number NIB to a hex digit. */ | |
1466 | static int | |
1467 | tohex (nib) | |
1468 | int nib; | |
1469 | { | |
1470 | if (nib < 10) | |
1471 | return '0'+nib; | |
1472 | else | |
1473 | return 'a'+nib-10; | |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * _initialize_remote_monitors -- setup a few addtitional commands that | |
1478 | * are usually only used by monitors. | |
1479 | */ | |
1480 | void | |
1481 | _initialize_remote_monitors () | |
1482 | { | |
1483 | /* generic monitor command */ | |
1484 | add_com ("monitor", class_obscure, monitor_command, | |
1485 | "Send a command to the debug monitor."); | |
1486 | ||
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * _initialize_array -- do any special init stuff for the target. | |
1491 | */ | |
1492 | void | |
1493 | _initialize_array () | |
1494 | { | |
1495 | init_array_ops() ; | |
1496 | add_target (&array_ops); | |
1497 | } |