Commit | Line | Data |
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51d6a954 | 1 | /* Remote debugging interface for boot monitors, for GDB. |
431b7d5f | 2 | Copyright 1990, 1991, 1992, 1993, 1995 Free Software Foundation, Inc. |
51d6a954 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 various remote-* modules. It is a collection | |
22 | of generic support functions so GDB can talk directly to a ROM based | |
23 | monitor. This saves use from having to hack an exception based handler | |
24 | into existance, and makes for quick porting. | |
25 | ||
26 | This module talks to a debug monitor called 'MONITOR', which | |
27 | We communicate with MONITOR via either a direct serial line, or a TCP | |
28 | (or possibly TELNET) stream to a terminal multiplexor, | |
431b7d5f | 29 | which in turn talks to the target board. */ |
51d6a954 RS |
30 | |
31 | #include "defs.h" | |
32 | #include "gdbcore.h" | |
33 | #include "target.h" | |
34 | #include "wait.h" | |
4a430794 | 35 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
36 | #include <stdarg.h> |
37 | #else | |
51d6a954 | 38 | #include <varargs.h> |
85c613aa | 39 | #endif |
51d6a954 RS |
40 | #include <signal.h> |
41 | #include <string.h> | |
42 | #include <sys/types.h> | |
43 | #include "command.h" | |
44 | #include "serial.h" | |
45 | #include "monitor.h" | |
1265e2d8 SG |
46 | #include "gdbcmd.h" |
47 | #include "inferior.h" | |
a706069f | 48 | #include "regex.h" |
51d6a954 | 49 | |
eba08643 C |
50 | static int readchar PARAMS ((int timeout)); |
51 | ||
8f078234 | 52 | static void monitor_command PARAMS ((char *args, int fromtty)); |
774e5d7f | 53 | static void monitor_load_srec PARAMS ((char *args)); |
431b7d5f | 54 | |
431b7d5f SS |
55 | static int monitor_make_srec PARAMS ((char *buffer, int type, |
56 | CORE_ADDR memaddr, | |
57 | unsigned char *myaddr, int len)); | |
58 | ||
1265e2d8 SG |
59 | static void monitor_fetch_register PARAMS ((int regno)); |
60 | static void monitor_store_register PARAMS ((int regno)); | |
61 | ||
a706069f SG |
62 | static void monitor_close PARAMS ((int quitting)); |
63 | static void monitor_detach PARAMS ((char *args, int from_tty)); | |
64 | static void monitor_resume PARAMS ((int pid, int step, enum target_signal sig)); | |
eba08643 C |
65 | static void monitor_interrupt PARAMS ((int signo)); |
66 | static void monitor_interrupt_twice PARAMS ((int signo)); | |
67 | static void monitor_interrupt_query PARAMS ((void)); | |
68 | static void monitor_wait_cleanup PARAMS ((int old_timeout)); | |
69 | ||
a706069f SG |
70 | static int monitor_wait PARAMS ((int pid, struct target_waitstatus *status)); |
71 | static void monitor_fetch_registers PARAMS ((int regno)); | |
72 | static void monitor_store_registers PARAMS ((int regno)); | |
73 | static void monitor_prepare_to_store PARAMS ((void)); | |
74 | static int monitor_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, int write, struct target_ops *target)); | |
75 | static void monitor_files_info PARAMS ((struct target_ops *ops)); | |
76 | static int monitor_insert_breakpoint PARAMS ((CORE_ADDR addr, char *shadow)); | |
77 | static int monitor_remove_breakpoint PARAMS ((CORE_ADDR addr, char *shadow)); | |
78 | static void monitor_kill PARAMS ((void)); | |
79 | static void monitor_load PARAMS ((char *file, int from_tty)); | |
80 | static void monitor_mourn_inferior PARAMS ((void)); | |
81 | static void monitor_stop PARAMS ((void)); | |
82 | ||
8f078234 | 83 | static int from_hex PARAMS ((int a)); |
1265e2d8 | 84 | static unsigned long get_hex_word PARAMS ((void)); |
06b8f5e4 | 85 | |
8f078234 | 86 | static struct monitor_ops *current_monitor; |
431b7d5f | 87 | |
774e5d7f | 88 | static int hashmark; /* flag set by "set hash" */ |
51d6a954 | 89 | |
1b552670 | 90 | static int timeout = 30; |
431b7d5f | 91 | |
4a430794 SS |
92 | static int in_monitor_wait = 0; /* Non-zero means we are in monitor_wait() */ |
93 | ||
eba08643 C |
94 | static void (*ofunc)(); /* Old SIGINT signal handler */ |
95 | ||
431b7d5f SS |
96 | /* Descriptor for I/O to remote machine. Initialize it to NULL so |
97 | that monitor_open knows that we don't have a file open when the | |
98 | program starts. */ | |
99 | ||
1265e2d8 | 100 | static serial_t monitor_desc = NULL; |
431b7d5f | 101 | |
a706069f SG |
102 | /* Pointer to regexp pattern matching data */ |
103 | ||
104 | static struct re_pattern_buffer register_pattern; | |
105 | ||
106 | /* Element 0 points to start of register name, and element 1 points to the | |
107 | start of the register value. */ | |
108 | ||
109 | static struct re_registers register_strings; | |
110 | ||
111 | static char fastmap[256]; | |
112 | ||
113 | static int dump_reg_flag; /* Non-zero means do a dump_registers cmd when | |
114 | monitor_wait wakes up. */ | |
115 | ||
eba08643 C |
116 | /* monitor_printf_noecho -- Send data to monitor, but don't expect an echo. |
117 | Works just like printf. */ | |
118 | ||
119 | void | |
4a430794 | 120 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
121 | monitor_printf_noecho (char *pattern, ...) |
122 | #else | |
eba08643 C |
123 | monitor_printf_noecho (va_alist) |
124 | va_dcl | |
85c613aa | 125 | #endif |
eba08643 C |
126 | { |
127 | va_list args; | |
eba08643 C |
128 | char sndbuf[2000]; |
129 | int len; | |
130 | ||
4a430794 | 131 | #if ANSI_PROTOTYPES |
85c613aa C |
132 | va_start (args, pattern); |
133 | #else | |
134 | char *pattern; | |
eba08643 | 135 | va_start (args); |
eba08643 | 136 | pattern = va_arg (args, char *); |
85c613aa | 137 | #endif |
eba08643 C |
138 | |
139 | vsprintf (sndbuf, pattern, args); | |
140 | ||
141 | if (remote_debug > 0) | |
142 | fputs_unfiltered (sndbuf, gdb_stderr); | |
143 | ||
144 | len = strlen (sndbuf); | |
145 | ||
146 | if (len + 1 > sizeof sndbuf) | |
147 | abort (); | |
148 | ||
149 | if (SERIAL_WRITE(monitor_desc, sndbuf, len)) | |
150 | fprintf_unfiltered (stderr, "SERIAL_WRITE failed: %s\n", safe_strerror (errno)); | |
151 | } | |
152 | ||
153 | /* monitor_printf -- Send data to monitor and check the echo. Works just like | |
154 | printf. */ | |
431b7d5f | 155 | |
774e5d7f | 156 | void |
4a430794 | 157 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
158 | monitor_printf (char *pattern, ...) |
159 | #else | |
774e5d7f | 160 | monitor_printf (va_alist) |
51d6a954 | 161 | va_dcl |
85c613aa | 162 | #endif |
51d6a954 RS |
163 | { |
164 | va_list args; | |
eba08643 | 165 | char sndbuf[2000]; |
774e5d7f | 166 | int len; |
eba08643 | 167 | int i, c; |
51d6a954 | 168 | |
4a430794 | 169 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
170 | va_start (args, pattern); |
171 | #else | |
172 | char *pattern; | |
431b7d5f | 173 | va_start (args); |
431b7d5f | 174 | pattern = va_arg (args, char *); |
85c613aa | 175 | #endif |
51d6a954 | 176 | |
eba08643 | 177 | vsprintf (sndbuf, pattern, args); |
51d6a954 | 178 | |
1265e2d8 | 179 | if (remote_debug > 0) |
eba08643 | 180 | fputs_unfiltered (sndbuf, gdb_stderr); |
51d6a954 | 181 | |
eba08643 | 182 | len = strlen (sndbuf); |
431b7d5f | 183 | |
eba08643 | 184 | if (len + 1 > sizeof sndbuf) |
774e5d7f | 185 | abort (); |
431b7d5f | 186 | |
eba08643 | 187 | if (SERIAL_WRITE(monitor_desc, sndbuf, len)) |
774e5d7f | 188 | fprintf_unfiltered (stderr, "SERIAL_WRITE failed: %s\n", safe_strerror (errno)); |
eba08643 C |
189 | |
190 | for (i = 0; i < len; i++) | |
191 | { | |
192 | trycr: | |
193 | c = readchar (timeout); | |
194 | ||
195 | if (c != sndbuf[i]) | |
196 | { | |
197 | #if 0 | |
198 | if (sndbuf[i] == '\r' | |
199 | && c == '\n') | |
200 | goto trycr; | |
201 | #endif | |
202 | error ("monitor_printf: Bad echo. Sent: \"%s\", Got: \"%.*s%c\".", | |
203 | sndbuf, i, sndbuf, c); | |
204 | } | |
205 | } | |
e6fa5bd6 RS |
206 | } |
207 | ||
431b7d5f SS |
208 | /* Read a character from the remote system, doing all the fancy |
209 | timeout stuff. */ | |
210 | ||
51d6a954 | 211 | static int |
431b7d5f | 212 | readchar (timeout) |
51d6a954 RS |
213 | int timeout; |
214 | { | |
215 | int c; | |
216 | ||
431b7d5f | 217 | c = SERIAL_READCHAR (monitor_desc, timeout); |
51d6a954 | 218 | |
1265e2d8 | 219 | if (remote_debug > 0) |
a706069f | 220 | fputc_unfiltered (c, gdb_stderr); |
51d6a954 RS |
221 | |
222 | if (c >= 0) | |
223 | return c & 0x7f; | |
224 | ||
431b7d5f | 225 | if (c == SERIAL_TIMEOUT) |
4a430794 SS |
226 | #ifdef MAINTENANCE_CMDS |
227 | if (in_monitor_wait) /* Watchdog went off */ | |
228 | { | |
229 | target_mourn_inferior (); | |
230 | error ("Watchdog has expired. Target detached.\n"); | |
231 | } | |
232 | else | |
233 | #endif | |
234 | error ("Timeout reading from remote system."); | |
a706069f | 235 | |
431b7d5f | 236 | perror_with_name ("remote-monitor"); |
51d6a954 RS |
237 | } |
238 | ||
1265e2d8 | 239 | /* Scan input from the remote system, until STRING is found. If BUF is non- |
a706069f SG |
240 | zero, then collect input until we have collected either STRING or BUFLEN-1 |
241 | chars. In either case we terminate BUF with a 0. If input overflows BUF | |
242 | because STRING can't be found, return -1, else return number of chars in BUF | |
243 | (minus the terminating NUL). Note that in the non-overflow case, STRING | |
244 | will be at the end of BUF. */ | |
431b7d5f | 245 | |
774e5d7f SS |
246 | int |
247 | monitor_expect (string, buf, buflen) | |
51d6a954 | 248 | char *string; |
1265e2d8 SG |
249 | char *buf; |
250 | int buflen; | |
51d6a954 RS |
251 | { |
252 | char *p = string; | |
1265e2d8 | 253 | int obuflen = buflen; |
51d6a954 RS |
254 | int c; |
255 | ||
51d6a954 | 256 | immediate_quit = 1; |
431b7d5f SS |
257 | while (1) |
258 | { | |
1265e2d8 | 259 | if (buf) |
431b7d5f | 260 | { |
a706069f | 261 | if (buflen < 2) |
431b7d5f | 262 | { |
a706069f | 263 | *buf = '\000'; |
431b7d5f | 264 | immediate_quit = 0; |
1265e2d8 | 265 | return -1; |
431b7d5f | 266 | } |
1265e2d8 SG |
267 | |
268 | c = readchar (timeout); | |
269 | *buf++ = c; | |
270 | buflen--; | |
431b7d5f SS |
271 | } |
272 | else | |
1265e2d8 SG |
273 | c = readchar (timeout); |
274 | ||
275 | if (c == *p++) | |
431b7d5f | 276 | { |
1265e2d8 | 277 | if (*p == '\0') |
431b7d5f | 278 | { |
1265e2d8 SG |
279 | immediate_quit = 0; |
280 | ||
a706069f SG |
281 | if (buf) |
282 | { | |
283 | *buf++ = '\000'; | |
284 | return obuflen - buflen; | |
285 | } | |
286 | else | |
287 | return 0; | |
431b7d5f | 288 | } |
1265e2d8 SG |
289 | } |
290 | else | |
291 | { | |
431b7d5f | 292 | p = string; |
1265e2d8 SG |
293 | if (c == *p) |
294 | p++; | |
431b7d5f | 295 | } |
51d6a954 | 296 | } |
51d6a954 RS |
297 | } |
298 | ||
299 | /* Keep discarding input until we see the MONITOR prompt. | |
300 | ||
301 | The convention for dealing with the prompt is that you | |
302 | o give your command | |
303 | o *then* wait for the prompt. | |
304 | ||
305 | Thus the last thing that a procedure does with the serial line | |
774e5d7f | 306 | will be an monitor_expect_prompt(). Exception: monitor_resume does not |
51d6a954 RS |
307 | wait for the prompt, because the terminal is being handed over |
308 | to the inferior. However, the next thing which happens after that | |
309 | is a monitor_wait which does wait for the prompt. | |
310 | Note that this includes abnormal exit, e.g. error(). This is | |
311 | necessary to prevent getting into states from which we can't | |
312 | recover. */ | |
431b7d5f | 313 | |
774e5d7f SS |
314 | int |
315 | monitor_expect_prompt (buf, buflen) | |
1265e2d8 SG |
316 | char *buf; |
317 | int buflen; | |
51d6a954 | 318 | { |
774e5d7f | 319 | return monitor_expect (PROMPT, buf, buflen); |
51d6a954 RS |
320 | } |
321 | ||
431b7d5f SS |
322 | /* Get N 32-bit words from remote, each preceded by a space, and put |
323 | them in registers starting at REGNO. */ | |
324 | ||
1265e2d8 | 325 | static unsigned long |
51d6a954 RS |
326 | get_hex_word () |
327 | { | |
1265e2d8 | 328 | unsigned long val; |
51d6a954 | 329 | int i; |
1265e2d8 | 330 | int ch; |
51d6a954 | 331 | |
1265e2d8 SG |
332 | do |
333 | ch = readchar (timeout); | |
334 | while (isspace(ch)); | |
cf51c601 | 335 | |
1265e2d8 SG |
336 | val = from_hex (ch); |
337 | ||
338 | for (i = 7; i >= 1; i--) | |
431b7d5f | 339 | { |
1265e2d8 SG |
340 | ch = readchar (timeout); |
341 | if (!isxdigit (ch)) | |
342 | break; | |
343 | val = (val << 4) | from_hex (ch); | |
431b7d5f | 344 | } |
51d6a954 RS |
345 | |
346 | return val; | |
347 | } | |
348 | ||
431b7d5f SS |
349 | /* Open a connection to a remote debugger. NAME is the filename used |
350 | for communication. */ | |
351 | ||
1265e2d8 | 352 | static char *dev_name; |
8f078234 | 353 | static struct target_ops *targ_ops; |
51d6a954 RS |
354 | |
355 | void | |
1265e2d8 | 356 | monitor_open (args, mon_ops, from_tty) |
51d6a954 | 357 | char *args; |
1265e2d8 | 358 | struct monitor_ops *mon_ops; |
51d6a954 RS |
359 | int from_tty; |
360 | { | |
1265e2d8 SG |
361 | char *name; |
362 | int i; | |
a706069f SG |
363 | char **p; |
364 | ||
365 | if (mon_ops->magic != MONITOR_OPS_MAGIC) | |
366 | error ("Magic number of monitor_ops struct wrong."); | |
1265e2d8 SG |
367 | |
368 | targ_ops = mon_ops->target; | |
369 | name = targ_ops->to_shortname; | |
51d6a954 | 370 | |
1265e2d8 | 371 | if (!args) |
51d6a954 RS |
372 | error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\ |
373 | `target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name, name); | |
374 | ||
1265e2d8 SG |
375 | target_preopen (from_tty); |
376 | ||
a706069f SG |
377 | /* Setup pattern for register dump */ |
378 | ||
379 | if (mon_ops->register_pattern) | |
380 | { | |
381 | int tmp; | |
382 | char *val; | |
383 | ||
384 | register_pattern.fastmap = fastmap; | |
385 | tmp = re_set_syntax (RE_SYNTAX_EMACS); | |
386 | val = re_compile_pattern (mon_ops->register_pattern, | |
387 | strlen (mon_ops->register_pattern), | |
388 | ®ister_pattern); | |
389 | re_set_syntax (tmp); | |
390 | if (val) | |
391 | error ("Can't compiler register pattern string: %s!", val); | |
392 | re_compile_fastmap (®ister_pattern); | |
393 | } | |
394 | ||
1265e2d8 SG |
395 | unpush_target (targ_ops); |
396 | ||
397 | if (dev_name) | |
398 | free (dev_name); | |
399 | dev_name = strsave (args); | |
51d6a954 | 400 | |
431b7d5f | 401 | monitor_desc = SERIAL_OPEN (dev_name); |
51d6a954 | 402 | |
1265e2d8 | 403 | if (!monitor_desc) |
431b7d5f SS |
404 | perror_with_name (dev_name); |
405 | ||
406 | if (baud_rate != -1) | |
407 | { | |
408 | if (SERIAL_SETBAUDRATE (monitor_desc, baud_rate)) | |
409 | { | |
410 | SERIAL_CLOSE (monitor_desc); | |
1265e2d8 | 411 | perror_with_name (dev_name); |
431b7d5f | 412 | } |
51d6a954 | 413 | } |
7a1330f7 | 414 | |
431b7d5f | 415 | SERIAL_RAW (monitor_desc); |
51d6a954 | 416 | |
1265e2d8 SG |
417 | SERIAL_FLUSH_INPUT (monitor_desc); |
418 | ||
cf51c601 | 419 | /* some systems only work with 2 stop bits */ |
1265e2d8 SG |
420 | |
421 | SERIAL_SETSTOPBITS (monitor_desc, mon_ops->stopbits); | |
422 | ||
423 | current_monitor = mon_ops; | |
51d6a954 | 424 | |
a706069f SG |
425 | /* See if we can wake up the monitor. First, try sending a stop sequence, |
426 | then send the init strings. Last, remove all breakpoints. */ | |
427 | ||
eba08643 C |
428 | if (current_monitor->stop) |
429 | { | |
430 | monitor_stop (); | |
431 | monitor_expect_prompt (NULL, 0); | |
432 | } | |
431b7d5f | 433 | |
1265e2d8 | 434 | /* wake up the monitor and see if it's alive */ |
a706069f SG |
435 | for (p = mon_ops->init; *p != NULL; p++) |
436 | { | |
774e5d7f SS |
437 | monitor_printf (*p); |
438 | monitor_expect_prompt (NULL, 0); | |
a706069f SG |
439 | } |
440 | ||
eba08643 C |
441 | SERIAL_FLUSH_INPUT (monitor_desc); |
442 | ||
a706069f | 443 | /* Remove all breakpoints */ |
431b7d5f | 444 | |
a706069f SG |
445 | if (mon_ops->clr_all_break) |
446 | { | |
774e5d7f SS |
447 | monitor_printf (mon_ops->clr_all_break); |
448 | monitor_expect_prompt (NULL, 0); | |
a706069f | 449 | } |
1265e2d8 | 450 | |
51d6a954 | 451 | if (from_tty) |
1265e2d8 SG |
452 | printf_unfiltered ("Remote target %s connected to %s\n", name, dev_name); |
453 | ||
454 | push_target (targ_ops); | |
455 | ||
456 | inferior_pid = 42000; /* Make run command think we are busy... */ | |
457 | ||
eba08643 C |
458 | /* Give monitor_wait something to read */ |
459 | ||
460 | monitor_printf (current_monitor->line_term); | |
1265e2d8 SG |
461 | |
462 | start_remote (); | |
51d6a954 RS |
463 | } |
464 | ||
431b7d5f SS |
465 | /* Close out all files and local state before this target loses |
466 | control. */ | |
51d6a954 | 467 | |
a706069f | 468 | static void |
51d6a954 RS |
469 | monitor_close (quitting) |
470 | int quitting; | |
471 | { | |
1265e2d8 SG |
472 | if (monitor_desc) |
473 | SERIAL_CLOSE (monitor_desc); | |
51d6a954 | 474 | monitor_desc = NULL; |
51d6a954 RS |
475 | } |
476 | ||
431b7d5f SS |
477 | /* Terminate the open connection to the remote debugger. Use this |
478 | when you want to detach and do something else with your gdb. */ | |
479 | ||
a706069f | 480 | static void |
1265e2d8 SG |
481 | monitor_detach (args, from_tty) |
482 | char *args; | |
51d6a954 RS |
483 | int from_tty; |
484 | { | |
431b7d5f | 485 | pop_target (); /* calls monitor_close to do the real work */ |
51d6a954 | 486 | if (from_tty) |
1265e2d8 | 487 | printf_unfiltered ("Ending remote %s debugging\n", target_shortname); |
51d6a954 | 488 | } |
7804e5bc | 489 | |
a706069f SG |
490 | /* Convert VALSTR into the target byte-ordered value of REGNO and store it. */ |
491 | ||
492 | char * | |
493 | monitor_supply_register (regno, valstr) | |
494 | int regno; | |
495 | char *valstr; | |
496 | { | |
497 | unsigned LONGEST val; | |
498 | unsigned char regbuf[MAX_REGISTER_RAW_SIZE]; | |
499 | char *p; | |
500 | ||
501 | val = strtoul (valstr, &p, 16); | |
502 | ||
503 | if (val == 0 && valstr == p) | |
504 | error ("monitor_supply_register (%d): bad value from monitor: %s.", | |
505 | regno, valstr); | |
506 | ||
507 | /* supply register stores in target byte order, so swap here */ | |
508 | ||
509 | store_unsigned_integer (regbuf, REGISTER_RAW_SIZE (regno), val); | |
510 | ||
511 | supply_register (regno, regbuf); | |
512 | ||
513 | return p; | |
514 | } | |
515 | ||
431b7d5f SS |
516 | /* Tell the remote machine to resume. */ |
517 | ||
a706069f | 518 | static void |
51d6a954 RS |
519 | monitor_resume (pid, step, sig) |
520 | int pid, step; | |
521 | enum target_signal sig; | |
522 | { | |
431b7d5f | 523 | if (step) |
774e5d7f | 524 | monitor_printf (STEP_CMD); |
431b7d5f | 525 | else |
a706069f | 526 | { |
774e5d7f | 527 | monitor_printf (CONT_CMD); |
a706069f SG |
528 | if (current_monitor->flags & MO_NEED_REGDUMP_AFTER_CONT) |
529 | dump_reg_flag = 1; | |
530 | } | |
531 | } | |
532 | ||
533 | /* Parse the output of a register dump command. A monitor specific regexp is | |
534 | used to extract individual register descriptions of the form REG=VAL. Each | |
535 | description is split up into a name and a value string which are passed down | |
536 | to monitor specific code. */ | |
537 | ||
538 | static char * | |
539 | parse_register_dump (buf, len) | |
540 | char *buf; | |
541 | int len; | |
542 | { | |
543 | while (1) | |
544 | { | |
545 | int regnamelen, vallen; | |
546 | char *regname, *val; | |
547 | ||
548 | if (re_search (®ister_pattern, buf, len, 0, len, | |
549 | ®ister_strings) == -1) | |
550 | break; | |
551 | ||
552 | regnamelen = register_strings.end[1] - register_strings.start[1]; | |
553 | regname = buf + register_strings.start[1]; | |
554 | vallen = register_strings.end[2] - register_strings.start[2]; | |
555 | val = buf + register_strings.start[2]; | |
556 | ||
557 | current_monitor->supply_register (regname, regnamelen, val, vallen); | |
558 | ||
559 | buf += register_strings.end[0]; | |
560 | len -= register_strings.end[0]; | |
561 | } | |
51d6a954 RS |
562 | } |
563 | ||
eba08643 C |
564 | /* Send ^C to target to halt it. Target will respond, and send us a |
565 | packet. */ | |
566 | ||
567 | static void | |
568 | monitor_interrupt (signo) | |
569 | int signo; | |
570 | { | |
571 | /* If this doesn't work, try more severe steps. */ | |
572 | signal (signo, monitor_interrupt_twice); | |
573 | ||
574 | if (remote_debug) | |
575 | printf_unfiltered ("monitor_interrupt called\n"); | |
576 | ||
577 | target_stop (); | |
578 | } | |
579 | ||
580 | /* The user typed ^C twice. */ | |
581 | ||
582 | static void | |
583 | monitor_interrupt_twice (signo) | |
584 | int signo; | |
585 | { | |
586 | signal (signo, ofunc); | |
587 | ||
588 | monitor_interrupt_query (); | |
589 | ||
590 | signal (signo, monitor_interrupt); | |
591 | } | |
592 | ||
593 | /* Ask the user what to do when an interrupt is received. */ | |
594 | ||
595 | static void | |
596 | monitor_interrupt_query () | |
597 | { | |
598 | target_terminal_ours (); | |
599 | ||
600 | if (query ("Interrupted while waiting for the program.\n\ | |
601 | Give up (and stop debugging it)? ")) | |
602 | { | |
603 | target_mourn_inferior (); | |
604 | return_to_top_level (RETURN_QUIT); | |
605 | } | |
606 | ||
607 | target_terminal_inferior (); | |
608 | } | |
609 | ||
610 | static void | |
611 | monitor_wait_cleanup (old_timeout) | |
612 | int old_timeout; | |
613 | { | |
614 | timeout = old_timeout; | |
615 | signal (SIGINT, ofunc); | |
4a430794 | 616 | in_monitor_wait = 0; |
eba08643 C |
617 | } |
618 | ||
431b7d5f SS |
619 | /* Wait until the remote machine stops, then return, storing status in |
620 | status just as `wait' would. */ | |
621 | ||
a706069f | 622 | static int |
51d6a954 RS |
623 | monitor_wait (pid, status) |
624 | int pid; | |
625 | struct target_waitstatus *status; | |
626 | { | |
627 | int old_timeout = timeout; | |
774e5d7f | 628 | char buf[1024]; |
a706069f | 629 | int resp_len; |
eba08643 | 630 | struct cleanup *old_chain; |
51d6a954 RS |
631 | |
632 | status->kind = TARGET_WAITKIND_EXITED; | |
633 | status->value.integer = 0; | |
634 | ||
eba08643 C |
635 | old_chain = make_cleanup (monitor_wait_cleanup, old_timeout); |
636 | ||
4a430794 SS |
637 | #ifdef MAINTENANCE_CMDS |
638 | in_monitor_wait = 1; | |
639 | timeout = watchdog > 0 ? watchdog : -1; | |
640 | #else | |
1265e2d8 | 641 | timeout = -1; /* Don't time out -- user program is running. */ |
4a430794 | 642 | #endif |
51d6a954 | 643 | |
eba08643 C |
644 | ofunc = (void (*)()) signal (SIGINT, monitor_interrupt); |
645 | ||
a706069f SG |
646 | do |
647 | { | |
774e5d7f | 648 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); |
51d6a954 | 649 | |
a706069f SG |
650 | if (resp_len <= 0) |
651 | fprintf_unfiltered (gdb_stderr, "monitor_wait: excessive response from monitor: %s.", buf); | |
652 | } | |
653 | while (resp_len < 0); | |
51d6a954 | 654 | |
eba08643 C |
655 | signal (SIGINT, ofunc); |
656 | ||
51d6a954 RS |
657 | timeout = old_timeout; |
658 | ||
a706069f SG |
659 | if (dump_reg_flag && current_monitor->dump_registers) |
660 | { | |
661 | dump_reg_flag = 0; | |
662 | ||
774e5d7f SS |
663 | monitor_printf (current_monitor->dump_registers); |
664 | resp_len = monitor_expect_prompt (buf, sizeof (buf)); | |
a706069f SG |
665 | } |
666 | ||
667 | if (current_monitor->register_pattern) | |
668 | parse_register_dump (buf, resp_len); | |
669 | ||
670 | status->kind = TARGET_WAITKIND_STOPPED; | |
671 | status->value.sig = TARGET_SIGNAL_TRAP; | |
672 | ||
eba08643 C |
673 | discard_cleanups (old_chain); |
674 | ||
4a430794 SS |
675 | in_monitor_wait = 0; |
676 | ||
1265e2d8 | 677 | return inferior_pid; |
51d6a954 RS |
678 | } |
679 | ||
1265e2d8 SG |
680 | /* Fetch register REGNO, or all registers if REGNO is -1. Returns |
681 | errno value. */ | |
51d6a954 | 682 | |
1265e2d8 SG |
683 | static void |
684 | monitor_fetch_register (regno) | |
685 | int regno; | |
686 | { | |
1265e2d8 | 687 | char *name; |
774e5d7f | 688 | static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; |
eba08643 C |
689 | char regbuf[MAX_REGISTER_RAW_SIZE * 2 + 1]; |
690 | int i; | |
51d6a954 | 691 | |
8f078234 | 692 | name = REGNAMES (regno); |
f1ca4cbc | 693 | |
1265e2d8 | 694 | if (!name) |
774e5d7f SS |
695 | { |
696 | supply_register (regno, zerobuf); | |
697 | return; | |
698 | } | |
51d6a954 | 699 | |
1265e2d8 | 700 | /* send the register examine command */ |
431b7d5f | 701 | |
774e5d7f | 702 | monitor_printf (current_monitor->getreg.cmd, name); |
1b552670 | 703 | |
eba08643 C |
704 | /* If RESP_DELIM is specified, we search for that as a leading delimiter for |
705 | the register value. Otherwise, we just start searching from the start of | |
706 | the buf. */ | |
707 | ||
708 | if (current_monitor->getreg.resp_delim) | |
709 | monitor_expect (current_monitor->getreg.resp_delim, NULL, 0); | |
710 | ||
711 | /* Now, read the appropriate number of hex digits for this register, skipping | |
712 | spaces. */ | |
713 | ||
714 | for (i = 0; i < REGISTER_RAW_SIZE (regno) * 2; i++) | |
715 | { | |
716 | int c; | |
717 | ||
718 | while (1) | |
719 | { | |
720 | c = readchar (timeout); | |
721 | if (isxdigit (c)) | |
722 | break; | |
723 | if (c == ' ') | |
724 | continue; | |
725 | ||
726 | error ("monitor_fetch_register (%d): bad response from monitor: %.*s%c.", | |
727 | regno, i, regbuf, c); | |
728 | } | |
729 | ||
730 | regbuf[i] = c; | |
731 | } | |
732 | ||
733 | regbuf[i] = '\000'; /* terminate the number */ | |
734 | ||
1265e2d8 SG |
735 | /* If TERM is present, we wait for that to show up. Also, (if TERM is |
736 | present), we will send TERM_CMD if that is present. In any case, we collect | |
737 | all of the output into buf, and then wait for the normal prompt. */ | |
1b552670 | 738 | |
1265e2d8 | 739 | if (current_monitor->getreg.term) |
431b7d5f | 740 | { |
eba08643 | 741 | monitor_expect (current_monitor->getreg.term, NULL, 0); /* get response */ |
1265e2d8 SG |
742 | |
743 | if (current_monitor->getreg.term_cmd) | |
431b7d5f | 744 | { |
eba08643 | 745 | monitor_printf (current_monitor->getreg.term_cmd); |
774e5d7f | 746 | monitor_expect_prompt (NULL, 0); |
431b7d5f SS |
747 | } |
748 | } | |
749 | else | |
eba08643 | 750 | monitor_expect_prompt (NULL, 0); /* get response */ |
51d6a954 | 751 | |
eba08643 | 752 | monitor_supply_register (regno, regbuf); |
51d6a954 RS |
753 | } |
754 | ||
1265e2d8 | 755 | /* Read the remote registers into the block regs. */ |
431b7d5f | 756 | |
a706069f | 757 | static void |
1265e2d8 SG |
758 | monitor_fetch_registers (regno) |
759 | int regno; | |
51d6a954 | 760 | { |
1265e2d8 | 761 | if (regno >= 0) |
431b7d5f | 762 | { |
1265e2d8 SG |
763 | monitor_fetch_register (regno); |
764 | return; | |
1b552670 | 765 | } |
51d6a954 | 766 | |
1265e2d8 SG |
767 | for (regno = 0; regno < NUM_REGS; regno++) |
768 | monitor_fetch_register (regno); | |
51d6a954 RS |
769 | } |
770 | ||
431b7d5f SS |
771 | /* Store register REGNO, or all if REGNO == 0. Return errno value. */ |
772 | ||
1265e2d8 | 773 | static void |
51d6a954 RS |
774 | monitor_store_register (regno) |
775 | int regno; | |
776 | { | |
777 | char *name; | |
1265e2d8 | 778 | unsigned LONGEST val; |
f1ca4cbc | 779 | |
8f078234 | 780 | name = REGNAMES (regno); |
1265e2d8 SG |
781 | if (!name) |
782 | return; | |
51d6a954 | 783 | |
1265e2d8 | 784 | val = read_register (regno); |
51d6a954 | 785 | |
1265e2d8 SG |
786 | /* send the register deposit command */ |
787 | ||
774e5d7f | 788 | monitor_printf (current_monitor->setreg.cmd, name, val); |
1265e2d8 SG |
789 | |
790 | /* It's possible that there are actually some monitors out there that will | |
791 | prompt you when you set a register. In that case, you may need to add some | |
792 | code here to deal with TERM and TERM_CMD (see monitor_fetch_register to get | |
793 | an idea of what's needed...) */ | |
794 | ||
774e5d7f | 795 | monitor_expect_prompt (NULL, 0); |
1265e2d8 SG |
796 | } |
797 | ||
798 | /* Store the remote registers. */ | |
799 | ||
a706069f | 800 | static void |
1265e2d8 SG |
801 | monitor_store_registers (regno) |
802 | int regno; | |
803 | { | |
804 | if (regno >= 0) | |
431b7d5f | 805 | { |
1265e2d8 SG |
806 | monitor_store_register (regno); |
807 | return; | |
51d6a954 | 808 | } |
431b7d5f | 809 | |
1265e2d8 SG |
810 | for (regno = 0; regno < NUM_REGS; regno++) |
811 | monitor_store_register (regno); | |
51d6a954 RS |
812 | } |
813 | ||
814 | /* Get ready to modify the registers array. On machines which store | |
815 | individual registers, this doesn't need to do anything. On machines | |
816 | which store all the registers in one fell swoop, this makes sure | |
817 | that registers contains all the registers from the program being | |
818 | debugged. */ | |
819 | ||
a706069f | 820 | static void |
51d6a954 RS |
821 | monitor_prepare_to_store () |
822 | { | |
823 | /* Do nothing, since we can store individual regs */ | |
824 | } | |
825 | ||
a706069f SG |
826 | static void |
827 | monitor_files_info (ops) | |
828 | struct target_ops *ops; | |
51d6a954 | 829 | { |
1265e2d8 | 830 | printf_unfiltered ("\tAttached to %s at %d baud.\n", dev_name, baud_rate); |
51d6a954 RS |
831 | } |
832 | ||
1265e2d8 SG |
833 | static int |
834 | monitor_write_memory (memaddr, myaddr, len) | |
51d6a954 RS |
835 | CORE_ADDR memaddr; |
836 | unsigned char *myaddr; | |
837 | int len; | |
838 | { | |
a706069f SG |
839 | unsigned LONGEST val; |
840 | char *cmd; | |
841 | int i; | |
1b552670 | 842 | |
a706069f | 843 | /* Use memory fill command for leading 0 bytes. */ |
1b552670 | 844 | |
a706069f SG |
845 | if (current_monitor->fill) |
846 | { | |
847 | for (i = 0; i < len; i++) | |
848 | if (myaddr[i] != 0) | |
849 | break; | |
850 | ||
851 | if (i > 4) /* More than 4 zeros is worth doing */ | |
852 | { | |
853 | if (current_monitor->flags & MO_FILL_USES_ADDR) | |
774e5d7f | 854 | monitor_printf (current_monitor->fill, memaddr, memaddr + i, 0); |
a706069f | 855 | else |
774e5d7f | 856 | monitor_printf (current_monitor->fill, memaddr, i, 0); |
a706069f | 857 | |
774e5d7f | 858 | monitor_expect_prompt (NULL, 0); |
a706069f SG |
859 | |
860 | return i; | |
861 | } | |
862 | } | |
863 | ||
864 | if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->setmem.cmdll) | |
865 | { | |
866 | len = 8; | |
867 | cmd = current_monitor->setmem.cmdll; | |
868 | } | |
869 | else if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->setmem.cmdl) | |
870 | { | |
871 | len = 4; | |
872 | cmd = current_monitor->setmem.cmdl; | |
873 | } | |
874 | else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->setmem.cmdw) | |
875 | { | |
876 | len = 2; | |
877 | cmd = current_monitor->setmem.cmdw; | |
878 | } | |
879 | else | |
880 | { | |
881 | len = 1; | |
882 | cmd = current_monitor->setmem.cmdb; | |
883 | } | |
884 | ||
885 | val = extract_unsigned_integer (myaddr, len); | |
886 | ||
774e5d7f | 887 | monitor_printf (cmd, memaddr, val); |
1265e2d8 | 888 | |
774e5d7f | 889 | monitor_expect_prompt (NULL, 0); |
1265e2d8 | 890 | |
a706069f | 891 | return len; |
51d6a954 RS |
892 | } |
893 | ||
eba08643 C |
894 | /* This is an alternate form of monitor_read_memory which is used for monitors |
895 | which can only read a single byte/word/etc. at a time. */ | |
896 | ||
897 | static int | |
898 | monitor_read_memory_single (memaddr, myaddr, len) | |
899 | CORE_ADDR memaddr; | |
900 | unsigned char *myaddr; | |
901 | int len; | |
902 | { | |
903 | unsigned LONGEST val; | |
904 | char membuf[sizeof(LONGEST) * 2 + 1]; | |
905 | char *p; | |
906 | char *cmd; | |
907 | int i; | |
908 | ||
909 | if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->getmem.cmdll) | |
910 | { | |
911 | len = 8; | |
912 | cmd = current_monitor->getmem.cmdll; | |
913 | } | |
914 | else if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->getmem.cmdl) | |
915 | { | |
916 | len = 4; | |
917 | cmd = current_monitor->getmem.cmdl; | |
918 | } | |
919 | else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->getmem.cmdw) | |
920 | { | |
921 | len = 2; | |
922 | cmd = current_monitor->getmem.cmdw; | |
923 | } | |
924 | else | |
925 | { | |
926 | len = 1; | |
927 | cmd = current_monitor->getmem.cmdb; | |
928 | } | |
929 | ||
930 | /* Send the examine command. */ | |
931 | ||
932 | monitor_printf (cmd, memaddr); | |
933 | ||
934 | /* If RESP_DELIM is specified, we search for that as a leading delimiter for | |
935 | the register value. Otherwise, we just start searching from the start of | |
936 | the buf. */ | |
937 | ||
938 | if (current_monitor->getmem.resp_delim) | |
939 | monitor_expect (current_monitor->getmem.resp_delim, NULL, 0); | |
940 | ||
941 | /* Now, read the appropriate number of hex digits for this loc, skipping | |
942 | spaces. */ | |
943 | ||
944 | for (i = 0; i < len * 2; i++) | |
945 | { | |
946 | int c; | |
947 | ||
948 | while (1) | |
949 | { | |
950 | c = readchar (timeout); | |
951 | if (isxdigit (c)) | |
952 | break; | |
953 | if (c == ' ') | |
954 | continue; | |
955 | ||
956 | error ("monitor_read_memory_single (0x%x): bad response from monitor: %.*s%c.", | |
957 | memaddr, i, membuf, c); | |
958 | } | |
959 | ||
960 | membuf[i] = c; | |
961 | } | |
962 | ||
963 | membuf[i] = '\000'; /* terminate the number */ | |
964 | ||
965 | /* If TERM is present, we wait for that to show up. Also, (if TERM is | |
966 | present), we will send TERM_CMD if that is present. In any case, we collect | |
967 | all of the output into buf, and then wait for the normal prompt. */ | |
968 | ||
969 | if (current_monitor->getmem.term) | |
970 | { | |
971 | monitor_expect (current_monitor->getmem.term, NULL, 0); /* get response */ | |
972 | ||
973 | if (current_monitor->getmem.term_cmd) | |
974 | { | |
975 | monitor_printf (current_monitor->getmem.term_cmd); | |
976 | monitor_expect_prompt (NULL, 0); | |
977 | } | |
978 | } | |
979 | else | |
980 | monitor_expect_prompt (NULL, 0); /* get response */ | |
981 | ||
982 | p = membuf; | |
983 | val = strtoul (membuf, &p, 16); | |
984 | ||
985 | if (val == 0 && membuf == p) | |
986 | error ("monitor_read_memory_single (0x%x): bad value from monitor: %s.", | |
987 | memaddr, membuf); | |
988 | ||
989 | /* supply register stores in target byte order, so swap here */ | |
990 | ||
991 | store_unsigned_integer (myaddr, len, val); | |
992 | ||
993 | return len; | |
994 | } | |
995 | ||
1265e2d8 SG |
996 | /* Copy LEN bytes of data from debugger memory at MYADDR to inferior's memory |
997 | at MEMADDR. Returns length moved. Currently, we only do one byte at a | |
998 | time. */ | |
431b7d5f | 999 | |
1265e2d8 SG |
1000 | static int |
1001 | monitor_read_memory (memaddr, myaddr, len) | |
51d6a954 RS |
1002 | CORE_ADDR memaddr; |
1003 | char *myaddr; | |
1004 | int len; | |
1005 | { | |
1265e2d8 SG |
1006 | unsigned LONGEST val; |
1007 | unsigned char regbuf[MAX_REGISTER_RAW_SIZE]; | |
774e5d7f | 1008 | char buf[512]; |
1265e2d8 SG |
1009 | char *p, *p1; |
1010 | char *name; | |
1011 | int resp_len; | |
a706069f SG |
1012 | int i; |
1013 | ||
eba08643 C |
1014 | if (current_monitor->flags & MO_GETMEM_READ_SINGLE) |
1015 | return monitor_read_memory_single (memaddr, myaddr, len); | |
1016 | ||
a706069f | 1017 | len = min (len, 16); |
1265e2d8 | 1018 | |
774e5d7f SS |
1019 | /* See if xfer would cross a 16 byte boundary. If so, clip it. */ |
1020 | if (((memaddr ^ (memaddr + len - 1)) & ~0xf) != 0) | |
1021 | len = ((memaddr + len) & ~0xf) - memaddr; | |
1022 | ||
1265e2d8 SG |
1023 | /* send the memory examine command */ |
1024 | ||
774e5d7f SS |
1025 | if (current_monitor->flags & MO_GETMEM_NEEDS_RANGE) |
1026 | monitor_printf (current_monitor->getmem.cmdb, memaddr, memaddr + len - 1); | |
1027 | else | |
1028 | monitor_printf (current_monitor->getmem.cmdb, memaddr, len); | |
1265e2d8 SG |
1029 | |
1030 | /* If TERM is present, we wait for that to show up. Also, (if TERM is | |
1031 | present), we will send TERM_CMD if that is present. In any case, we collect | |
1032 | all of the output into buf, and then wait for the normal prompt. */ | |
1033 | ||
1034 | if (current_monitor->getmem.term) | |
431b7d5f | 1035 | { |
774e5d7f | 1036 | resp_len = monitor_expect (current_monitor->getmem.term, buf, sizeof buf); /* get response */ |
1265e2d8 SG |
1037 | |
1038 | if (resp_len <= 0) | |
8f078234 SG |
1039 | error ("monitor_read_memory (0x%x): excessive response from monitor: %.*s.", |
1040 | memaddr, resp_len, buf); | |
1265e2d8 SG |
1041 | |
1042 | if (current_monitor->getmem.term_cmd) | |
431b7d5f | 1043 | { |
1265e2d8 SG |
1044 | SERIAL_WRITE (monitor_desc, current_monitor->getmem.term_cmd, |
1045 | strlen (current_monitor->getmem.term_cmd)); | |
774e5d7f | 1046 | monitor_expect_prompt (NULL, 0); |
1b552670 | 1047 | } |
51d6a954 | 1048 | } |
1265e2d8 | 1049 | else |
774e5d7f SS |
1050 | resp_len = monitor_expect_prompt (buf, sizeof buf); /* get response */ |
1051 | ||
1052 | p = buf; | |
1053 | ||
1265e2d8 | 1054 | /* If RESP_DELIM is specified, we search for that as a leading delimiter for |
a706069f SG |
1055 | the values. Otherwise, we just start searching from the start of the buf. |
1056 | */ | |
1265e2d8 SG |
1057 | |
1058 | if (current_monitor->getmem.resp_delim) | |
1059 | { | |
774e5d7f | 1060 | p = strstr (p, current_monitor->getmem.resp_delim); |
1265e2d8 | 1061 | if (!p) |
8f078234 SG |
1062 | error ("monitor_read_memory (0x%x): bad response from monitor: %.*s.", |
1063 | memaddr, resp_len, buf); | |
1265e2d8 SG |
1064 | p += strlen (current_monitor->getmem.resp_delim); |
1065 | } | |
1265e2d8 | 1066 | |
a706069f SG |
1067 | for (i = len; i > 0; i--) |
1068 | { | |
774e5d7f SS |
1069 | /* Skip non-hex chars, but bomb on end of string and newlines */ |
1070 | ||
1071 | while (1) | |
1072 | { | |
1073 | if (isxdigit (*p)) | |
1074 | break; | |
1075 | if (*p == '\000' || *p == '\n' || *p == '\r') | |
1076 | error ("monitor_read_memory (0x%x): badly terminated response from monitor: %.*s", memaddr, resp_len, buf); | |
1077 | p++; | |
1078 | } | |
1079 | ||
a706069f | 1080 | val = strtoul (p, &p1, 16); |
1265e2d8 | 1081 | |
a706069f SG |
1082 | if (val == 0 && p == p1) |
1083 | error ("monitor_read_memory (0x%x): bad value from monitor: %.*s.", memaddr, | |
1084 | resp_len, buf); | |
1265e2d8 | 1085 | |
a706069f | 1086 | *myaddr++ = val; |
774e5d7f SS |
1087 | |
1088 | if (i == 1) | |
1089 | break; | |
1090 | ||
1091 | p = p1; | |
a706069f | 1092 | } |
1265e2d8 | 1093 | |
a706069f | 1094 | return len; |
51d6a954 RS |
1095 | } |
1096 | ||
a706069f | 1097 | static int |
1265e2d8 | 1098 | monitor_xfer_memory (memaddr, myaddr, len, write, target) |
51d6a954 RS |
1099 | CORE_ADDR memaddr; |
1100 | char *myaddr; | |
1101 | int len; | |
1102 | int write; | |
1103 | struct target_ops *target; /* ignored */ | |
1104 | { | |
1105 | if (write) | |
1265e2d8 | 1106 | return monitor_write_memory (memaddr, myaddr, len); |
51d6a954 | 1107 | else |
1265e2d8 | 1108 | return monitor_read_memory (memaddr, myaddr, len); |
51d6a954 RS |
1109 | } |
1110 | ||
a706069f SG |
1111 | static void |
1112 | monitor_kill () | |
51d6a954 RS |
1113 | { |
1114 | return; /* ignore attempts to kill target system */ | |
1115 | } | |
1116 | ||
a706069f SG |
1117 | /* All we actually do is set the PC to the start address of exec_bfd, and start |
1118 | the program at that point. */ | |
1119 | ||
1120 | static void | |
1121 | monitor_create_inferior (exec_file, args, env) | |
1122 | char *exec_file; | |
1123 | char *args; | |
1124 | char **env; | |
1125 | { | |
1126 | if (args && (*args != '\000')) | |
1127 | error ("Args are not supported by the monitor."); | |
1128 | ||
1129 | clear_proceed_status (); | |
1130 | proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0); | |
1131 | } | |
1132 | ||
51d6a954 RS |
1133 | /* Clean up when a program exits. |
1134 | The program actually lives on in the remote processor's RAM, and may be | |
1135 | run again without a download. Don't leave it full of breakpoint | |
1136 | instructions. */ | |
1137 | ||
a706069f | 1138 | static void |
51d6a954 RS |
1139 | monitor_mourn_inferior () |
1140 | { | |
8f078234 | 1141 | unpush_target (targ_ops); |
51d6a954 RS |
1142 | generic_mourn_inferior (); /* Do all the proper things now */ |
1143 | } | |
1144 | ||
1265e2d8 | 1145 | #define NUM_MONITOR_BREAKPOINTS 8 |
51d6a954 | 1146 | |
1265e2d8 | 1147 | static CORE_ADDR breakaddr[NUM_MONITOR_BREAKPOINTS] = {0}; |
51d6a954 | 1148 | |
431b7d5f SS |
1149 | /* Tell the monitor to add a breakpoint. */ |
1150 | ||
a706069f | 1151 | static int |
51d6a954 RS |
1152 | monitor_insert_breakpoint (addr, shadow) |
1153 | CORE_ADDR addr; | |
1154 | char *shadow; | |
1155 | { | |
1156 | int i; | |
1265e2d8 | 1157 | static unsigned char break_insn[] = BREAKPOINT; |
51d6a954 | 1158 | |
1265e2d8 | 1159 | for (i = 0; i < NUM_MONITOR_BREAKPOINTS; i++) |
431b7d5f SS |
1160 | { |
1161 | if (breakaddr[i] == 0) | |
1162 | { | |
1163 | breakaddr[i] = addr; | |
1265e2d8 | 1164 | monitor_read_memory (addr, shadow, sizeof (break_insn)); |
774e5d7f SS |
1165 | monitor_printf (SET_BREAK_CMD, addr); |
1166 | monitor_expect_prompt (NULL, 0); | |
431b7d5f SS |
1167 | return 0; |
1168 | } | |
f1ca4cbc | 1169 | } |
f1ca4cbc | 1170 | |
1265e2d8 | 1171 | error ("Too many breakpoints (> %d) for monitor.", NUM_MONITOR_BREAKPOINTS); |
51d6a954 RS |
1172 | } |
1173 | ||
431b7d5f SS |
1174 | /* Tell the monitor to remove a breakpoint. */ |
1175 | ||
a706069f | 1176 | static int |
51d6a954 RS |
1177 | monitor_remove_breakpoint (addr, shadow) |
1178 | CORE_ADDR addr; | |
1179 | char *shadow; | |
1180 | { | |
1181 | int i; | |
1182 | ||
1265e2d8 | 1183 | for (i = 0; i < NUM_MONITOR_BREAKPOINTS; i++) |
431b7d5f SS |
1184 | { |
1185 | if (breakaddr[i] == addr) | |
1186 | { | |
1187 | breakaddr[i] = 0; | |
1188 | /* some monitors remove breakpoints based on the address */ | |
a706069f | 1189 | if (current_monitor->flags & MO_CLR_BREAK_USES_ADDR) |
774e5d7f | 1190 | monitor_printf (CLR_BREAK_CMD, addr); |
431b7d5f | 1191 | else |
774e5d7f SS |
1192 | monitor_printf (CLR_BREAK_CMD, i); |
1193 | monitor_expect_prompt (NULL, 0); | |
431b7d5f SS |
1194 | return 0; |
1195 | } | |
7804e5bc | 1196 | } |
1265e2d8 | 1197 | fprintf_unfiltered (stderr, "Can't find breakpoint associated with 0x%x\n", addr); |
51d6a954 RS |
1198 | return 1; |
1199 | } | |
1200 | ||
774e5d7f | 1201 | /* monitor_load -- download a file. */ |
431b7d5f | 1202 | |
a706069f SG |
1203 | static void |
1204 | monitor_load (file, from_tty) | |
21ed3dcd | 1205 | char *file; |
a706069f | 1206 | int from_tty; |
21ed3dcd | 1207 | { |
774e5d7f SS |
1208 | if (current_monitor->load_routine) |
1209 | current_monitor->load_routine (monitor_desc, file, hashmark); | |
1210 | else | |
1211 | monitor_load_srec (file); | |
21ed3dcd | 1212 | |
a706069f | 1213 | /* Finally, make the PC point at the start address */ |
431b7d5f | 1214 | |
a706069f | 1215 | write_pc (bfd_get_start_address (exec_bfd)); |
431b7d5f | 1216 | |
a706069f | 1217 | inferior_pid = 0; /* No process now */ |
51d6a954 | 1218 | |
a706069f SG |
1219 | /* This is necessary because many things were based on the PC at the time that |
1220 | we attached to the monitor, which is no longer valid now that we have loaded | |
1221 | new code (and just changed the PC). Another way to do this might be to call | |
1222 | normal_stop, except that the stack may not be valid, and things would get | |
1223 | horribly confused... */ | |
51d6a954 | 1224 | |
a706069f SG |
1225 | clear_symtab_users (); |
1226 | } | |
1227 | ||
1228 | static void | |
1229 | monitor_stop () | |
1230 | { | |
eba08643 C |
1231 | if (current_monitor->stop) |
1232 | monitor_printf_noecho (current_monitor->stop); | |
51d6a954 RS |
1233 | } |
1234 | ||
431b7d5f SS |
1235 | /* Put a command string, in args, out to MONITOR. Output from MONITOR |
1236 | is placed on the users terminal until the prompt is seen. FIXME: We | |
1237 | read the characters ourseleves here cause of a nasty echo. */ | |
1238 | ||
8f078234 | 1239 | static void |
a706069f | 1240 | monitor_command (args, from_tty) |
431b7d5f | 1241 | char *args; |
a706069f | 1242 | int from_tty; |
51d6a954 | 1243 | { |
7804e5bc | 1244 | char *p; |
a706069f SG |
1245 | int resp_len; |
1246 | char buf[1000]; | |
431b7d5f | 1247 | |
51d6a954 | 1248 | if (monitor_desc == NULL) |
431b7d5f | 1249 | error ("monitor target not open."); |
7804e5bc | 1250 | |
774e5d7f SS |
1251 | p = PROMPT; |
1252 | ||
431b7d5f SS |
1253 | /* Send the command. Note that if no args were supplied, then we're |
1254 | just sending the monitor a newline, which is sometimes useful. */ | |
1255 | ||
774e5d7f | 1256 | monitor_printf ("%s\r", (args ? args : "")); |
7804e5bc | 1257 | |
774e5d7f | 1258 | resp_len = monitor_expect_prompt (buf, sizeof buf); |
a706069f SG |
1259 | |
1260 | fputs_unfiltered (buf, gdb_stdout); /* Output the response */ | |
51d6a954 RS |
1261 | } |
1262 | ||
774e5d7f | 1263 | /* Download a binary file by converting it to S records. */ |
431b7d5f | 1264 | |
21ed3dcd | 1265 | static void |
774e5d7f | 1266 | monitor_load_srec (args) |
21ed3dcd | 1267 | char *args; |
21ed3dcd RS |
1268 | { |
1269 | bfd *abfd; | |
1270 | asection *s; | |
431b7d5f | 1271 | char *buffer, srec[1024]; |
06b8f5e4 | 1272 | int i; |
eba08643 | 1273 | int srec_frame = 32; |
774e5d7f | 1274 | int reclen; |
21ed3dcd | 1275 | |
a706069f SG |
1276 | buffer = alloca (srec_frame * 2 + 256); |
1277 | ||
21ed3dcd | 1278 | abfd = bfd_openr (args, 0); |
431b7d5f SS |
1279 | if (!abfd) |
1280 | { | |
1281 | printf_filtered ("Unable to open file %s\n", args); | |
1282 | return; | |
1283 | } | |
21ed3dcd | 1284 | |
431b7d5f SS |
1285 | if (bfd_check_format (abfd, bfd_object) == 0) |
1286 | { | |
1287 | printf_filtered ("File is not an object file\n"); | |
1288 | return; | |
1289 | } | |
21ed3dcd | 1290 | |
774e5d7f | 1291 | monitor_printf (LOAD_CMD); /* tell the monitor to load */ |
a706069f | 1292 | if (current_monitor->loadresp) |
774e5d7f | 1293 | monitor_expect (current_monitor->loadresp, NULL, 0); |
a706069f | 1294 | |
a706069f SG |
1295 | for (s = abfd->sections; s; s = s->next) |
1296 | if (s->flags & SEC_LOAD) | |
1297 | { | |
1298 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, | |
1299 | s->vma + s->_raw_size); | |
1300 | gdb_flush (gdb_stdout); | |
774e5d7f | 1301 | |
a706069f SG |
1302 | for (i = 0; i < s->_raw_size; i += srec_frame) |
1303 | { | |
1304 | int numbytes; | |
1305 | ||
1306 | numbytes = min (srec_frame, s->_raw_size - i); | |
1307 | ||
1308 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
a706069f | 1309 | |
774e5d7f SS |
1310 | reclen = monitor_make_srec (srec, 3, s->vma + i, buffer, numbytes); |
1311 | ||
eba08643 | 1312 | monitor_printf_noecho ("%.*s\r", reclen, srec); |
a706069f SG |
1313 | |
1314 | if (hashmark) | |
1315 | { | |
1316 | putchar_unfiltered ('#'); | |
1317 | gdb_flush (gdb_stdout); | |
1318 | } | |
1319 | } /* Per-packet (or S-record) loop */ | |
774e5d7f | 1320 | |
a706069f SG |
1321 | putchar_unfiltered ('\n'); |
1322 | } /* Loadable sections */ | |
1323 | ||
1324 | if (hashmark) | |
1325 | putchar_unfiltered ('\n'); | |
06b8f5e4 | 1326 | |
431b7d5f SS |
1327 | /* Write a type 7 terminator record. no data for a type 7, and there |
1328 | is no data, so len is 0. */ | |
1329 | ||
774e5d7f | 1330 | reclen = monitor_make_srec (srec, 7, abfd->start_address, NULL, 0); |
06b8f5e4 | 1331 | |
eba08643 | 1332 | monitor_printf_noecho ("%.*s\r", reclen, srec); |
21ed3dcd | 1333 | |
eba08643 | 1334 | monitor_printf_noecho ("\r\r"); /* Some monitors need these to wake up */ |
431b7d5f | 1335 | |
774e5d7f | 1336 | monitor_expect_prompt (NULL, 0); |
eba08643 C |
1337 | |
1338 | SERIAL_FLUSH_INPUT (monitor_desc); | |
06b8f5e4 | 1339 | } |
21ed3dcd | 1340 | |
06b8f5e4 RS |
1341 | /* |
1342 | * monitor_make_srec -- make an srecord. This writes each line, one at a | |
1343 | * time, each with it's own header and trailer line. | |
1344 | * An srecord looks like this: | |
1345 | * | |
1346 | * byte count-+ address | |
1347 | * start ---+ | | data +- checksum | |
1348 | * | | | | | |
1349 | * S01000006F6B692D746573742E73726563E4 | |
1350 | * S315000448600000000000000000FC00005900000000E9 | |
1351 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
1352 | * S30B0004485A0000000000004E | |
1353 | * S70500040000F6 | |
1354 | * | |
1355 | * S<type><length><address><data><checksum> | |
1356 | * | |
1357 | * Where | |
1358 | * - length | |
1359 | * is the number of bytes following upto the checksum. Note that | |
1360 | * this is not the number of chars following, since it takes two | |
1361 | * chars to represent a byte. | |
1362 | * - type | |
1363 | * is one of: | |
1364 | * 0) header record | |
1365 | * 1) two byte address data record | |
1366 | * 2) three byte address data record | |
1367 | * 3) four byte address data record | |
1368 | * 7) four byte address termination record | |
1369 | * 8) three byte address termination record | |
1370 | * 9) two byte address termination record | |
1371 | * | |
1372 | * - address | |
1373 | * is the start address of the data following, or in the case of | |
1374 | * a termination record, the start address of the image | |
1375 | * - data | |
1376 | * is the data. | |
1377 | * - checksum | |
1378 | * is the sum of all the raw byte data in the record, from the length | |
1379 | * upwards, modulo 256 and subtracted from 255. | |
774e5d7f SS |
1380 | * |
1381 | * This routine returns the length of the S-record. | |
1382 | * | |
06b8f5e4 | 1383 | */ |
431b7d5f SS |
1384 | |
1385 | static int | |
06b8f5e4 RS |
1386 | monitor_make_srec (buffer, type, memaddr, myaddr, len) |
1387 | char *buffer; | |
1388 | int type; | |
21ed3dcd RS |
1389 | CORE_ADDR memaddr; |
1390 | unsigned char *myaddr; | |
1391 | int len; | |
1392 | { | |
774e5d7f | 1393 | unsigned char checksum; |
06b8f5e4 RS |
1394 | int i; |
1395 | char *buf; | |
774e5d7f | 1396 | static char hextab[] = "0123456789ABCDEF"; |
21ed3dcd | 1397 | |
06b8f5e4 | 1398 | buf = buffer; |
1265e2d8 | 1399 | |
06b8f5e4 RS |
1400 | checksum = 0; |
1401 | ||
431b7d5f SS |
1402 | /* Create the header for the srec. 4 is the number of bytes in the address, |
1403 | and 1 is the number of bytes in the count. */ | |
1404 | ||
06b8f5e4 RS |
1405 | sprintf (buf, "S%d%02X%08X", type, len + 4 + 1, memaddr); |
1406 | buf += 12; | |
1407 | ||
774e5d7f SS |
1408 | /* Note that the checksum is calculated on the raw data, not the hexified |
1409 | data. It includes the length, address and the data portions of the | |
1410 | packet. */ | |
1411 | ||
1412 | checksum += (len + 4 + 1 /* Packet length */ | |
1413 | + (memaddr & 0xff) /* Address... */ | |
06b8f5e4 RS |
1414 | + ((memaddr >> 8) & 0xff) |
1415 | + ((memaddr >> 16) & 0xff) | |
1416 | + ((memaddr >> 24) & 0xff)); | |
1417 | ||
431b7d5f SS |
1418 | /* build the srecord */ |
1419 | for (i = 0; i < len; i++) | |
1420 | { | |
774e5d7f SS |
1421 | *buf++ = hextab [myaddr[i] >> 4]; |
1422 | *buf++ = hextab [myaddr[i] & 0xf]; | |
431b7d5f | 1423 | checksum += myaddr[i]; |
431b7d5f | 1424 | } |
21ed3dcd | 1425 | |
774e5d7f | 1426 | checksum = ~checksum; |
431b7d5f | 1427 | |
774e5d7f SS |
1428 | *buf++ = hextab[checksum >> 4]; |
1429 | *buf++ = hextab[checksum & 0xf]; | |
06b8f5e4 | 1430 | |
774e5d7f | 1431 | return buf - buffer; |
1b552670 RS |
1432 | } |
1433 | ||
1434 | /* Convert hex digit A to a number. */ | |
431b7d5f | 1435 | |
1b552670 RS |
1436 | static int |
1437 | from_hex (a) | |
1438 | int a; | |
1439 | { | |
1b552670 RS |
1440 | if (a >= '0' && a <= '9') |
1441 | return a - '0'; | |
1442 | if (a >= 'a' && a <= 'f') | |
1443 | return a - 'a' + 10; | |
1444 | if (a >= 'A' && a <= 'F') | |
1445 | return a - 'A' + 10; | |
1b552670 | 1446 | |
1265e2d8 | 1447 | error ("Reply contains invalid hex digit 0x%x", a); |
1b552670 RS |
1448 | } |
1449 | ||
774e5d7f SS |
1450 | static struct target_ops monitor_ops = |
1451 | { | |
a706069f SG |
1452 | NULL, /* to_shortname */ |
1453 | NULL, /* to_longname */ | |
1454 | NULL, /* to_doc */ | |
1455 | NULL, /* to_open */ | |
1456 | monitor_close, /* to_close */ | |
1457 | NULL, /* to_attach */ | |
1458 | monitor_detach, /* to_detach */ | |
1459 | monitor_resume, /* to_resume */ | |
1460 | monitor_wait, /* to_wait */ | |
1461 | monitor_fetch_registers, /* to_fetch_registers */ | |
1462 | monitor_store_registers, /* to_store_registers */ | |
1463 | monitor_prepare_to_store, /* to_prepare_to_store */ | |
1464 | monitor_xfer_memory, /* to_xfer_memory */ | |
1465 | monitor_files_info, /* to_files_info */ | |
1466 | monitor_insert_breakpoint, /* to_insert_breakpoint */ | |
1467 | monitor_remove_breakpoint, /* to_remove_breakpoint */ | |
1468 | 0, /* to_terminal_init */ | |
1469 | 0, /* to_terminal_inferior */ | |
1470 | 0, /* to_terminal_ours_for_output */ | |
1471 | 0, /* to_terminal_ours */ | |
1472 | 0, /* to_terminal_info */ | |
1473 | monitor_kill, /* to_kill */ | |
1474 | monitor_load, /* to_load */ | |
1475 | 0, /* to_lookup_symbol */ | |
1476 | monitor_create_inferior, /* to_create_inferior */ | |
1477 | monitor_mourn_inferior, /* to_mourn_inferior */ | |
1478 | 0, /* to_can_run */ | |
1479 | 0, /* to_notice_signals */ | |
1480 | monitor_stop, /* to_stop */ | |
1481 | process_stratum, /* to_stratum */ | |
1482 | 0, /* to_next */ | |
1483 | 1, /* to_has_all_memory */ | |
1484 | 1, /* to_has_memory */ | |
1485 | 1, /* to_has_stack */ | |
1486 | 1, /* to_has_registers */ | |
1487 | 1, /* to_has_execution */ | |
1488 | 0, /* sections */ | |
1489 | 0, /* sections_end */ | |
1490 | OPS_MAGIC /* to_magic */ | |
1491 | }; | |
1492 | ||
1493 | /* Init the target_ops structure pointed at by OPS */ | |
1494 | ||
1495 | void | |
1496 | init_monitor_ops (ops) | |
1497 | struct target_ops *ops; | |
1498 | { | |
1499 | memcpy (ops, &monitor_ops, sizeof monitor_ops); | |
1500 | } | |
1501 | ||
431b7d5f SS |
1502 | /* Define additional commands that are usually only used by monitors. */ |
1503 | ||
51d6a954 RS |
1504 | void |
1505 | _initialize_remote_monitors () | |
1506 | { | |
51d6a954 RS |
1507 | add_show_from_set (add_set_cmd ("hash", no_class, var_boolean, |
1508 | (char *)&hashmark, | |
1509 | "Set display of activity while downloading a file.\n\ | |
1265e2d8 | 1510 | When enabled, a hashmark \'#\' is displayed.", |
51d6a954 RS |
1511 | &setlist), |
1512 | &showlist); | |
1513 | ||
51d6a954 RS |
1514 | add_com ("monitor", class_obscure, monitor_command, |
1515 | "Send a command to the debug monitor."); | |
1516 | } |