Commit | Line | Data |
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91c87211 JK |
1 | /* Remote debugging interface for Tandem ST2000 phone switch, for GDB. |
2 | Copyright 1990, 1991, 1992 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. Written by Jim Kingdon for Cygnus. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | /* This file was derived from remote-eb.c, which did a similar job, but for | |
22 | an AMD-29K running EBMON. That file was in turn derived from remote.c | |
23 | as mentioned in the following comment (left in for comic relief): | |
24 | ||
25 | "This is like remote.c but is for an esoteric situation-- | |
26 | having an a29k board in a PC hooked up to a unix machine with | |
27 | a serial line, and running ctty com1 on the PC, through which | |
28 | the unix machine can run ebmon. Not to mention that the PC | |
29 | has PC/NFS, so it can access the same executables that gdb can, | |
30 | over the net in real time." | |
31 | ||
32 | In reality, this module talks to a debug monitor called 'STDEBUG', which | |
33 | runs in a phone switch. We communicate with STDEBUG via either a direct | |
34 | serial line, or a TCP (or possibly TELNET) stream to a terminal multiplexor, | |
35 | which in turn talks to the phone switch. */ | |
36 | ||
37 | #include "defs.h" | |
38 | #include "gdbcore.h" | |
39 | #include "target.h" | |
40 | #include "wait.h" | |
41 | #include <varargs.h> | |
42 | #include <signal.h> | |
43 | #include <string.h> | |
44 | #include <sys/types.h> | |
45 | #include "serial.h" | |
46 | ||
47 | extern struct target_ops st2000_ops; /* Forward declaration */ | |
48 | ||
49 | static void st2000_close(); | |
50 | static void st2000_fetch_register(); | |
51 | static void st2000_store_register(); | |
52 | ||
53 | #define LOG_FILE "st2000.log" | |
54 | #if defined (LOG_FILE) | |
55 | FILE *log_file; | |
56 | #endif | |
57 | ||
58 | static int timeout = 24; | |
59 | ||
60 | /* Descriptor for I/O to remote machine. Initialize it to -1 so that | |
61 | st2000_open knows that we don't have a file open when the program | |
62 | starts. */ | |
63 | ||
64 | static serial_t st2000_desc; | |
65 | ||
66 | /* Send data to stdebug. Works just like printf. */ | |
67 | ||
68 | static void | |
69 | printf_stdebug(va_alist) | |
70 | va_dcl | |
71 | { | |
72 | va_list args; | |
73 | char *pattern; | |
74 | char buf[200]; | |
75 | ||
76 | va_start(args); | |
77 | ||
78 | pattern = va_arg(args, char *); | |
79 | ||
80 | vsprintf(buf, pattern, args); | |
81 | if (SERIAL_WRITE(st2000_desc, buf, strlen(buf))) | |
82 | fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno)); | |
83 | } | |
84 | ||
85 | /* Read a character from the remote system, doing all the fancy timeout | |
86 | stuff. */ | |
87 | ||
88 | static int | |
89 | readchar(timeout) | |
90 | int timeout; | |
91 | { | |
92 | int c; | |
93 | ||
94 | c = SERIAL_READCHAR(st2000_desc, timeout); | |
95 | ||
96 | #ifdef LOG_FILE | |
97 | putc(c & 0x7f, log_file); | |
98 | #endif | |
99 | ||
100 | if (c >= 0) | |
101 | return c & 0x7f; | |
102 | ||
103 | if (c == SERIAL_TIMEOUT) | |
104 | { | |
105 | if (timeout == 0) | |
106 | return c; /* Polls shouldn't generate timeout errors */ | |
107 | ||
108 | error("Timeout reading from remote system."); | |
109 | } | |
110 | ||
111 | perror_with_name("remote-st2000"); | |
112 | } | |
113 | ||
114 | /* Scan input from the remote system, until STRING is found. If DISCARD is | |
115 | non-zero, then discard non-matching input, else print it out. | |
116 | Let the user break out immediately. */ | |
117 | static void | |
118 | expect(string, discard) | |
119 | char *string; | |
120 | int discard; | |
121 | { | |
122 | char *p = string; | |
123 | int c; | |
124 | ||
125 | immediate_quit = 1; | |
126 | while (1) | |
127 | { | |
128 | c = readchar(timeout); | |
129 | if (c == *p++) | |
130 | { | |
131 | if (*p == '\0') | |
132 | { | |
133 | immediate_quit = 0; | |
134 | return; | |
135 | } | |
136 | } | |
137 | else | |
138 | { | |
139 | if (!discard) | |
140 | { | |
141 | fwrite(string, 1, (p - 1) - string, stdout); | |
142 | putchar((char)c); | |
143 | fflush(stdout); | |
144 | } | |
145 | p = string; | |
146 | } | |
147 | } | |
148 | } | |
149 | ||
150 | /* Keep discarding input until we see the STDEBUG prompt. | |
151 | ||
152 | The convention for dealing with the prompt is that you | |
153 | o give your command | |
154 | o *then* wait for the prompt. | |
155 | ||
156 | Thus the last thing that a procedure does with the serial line | |
157 | will be an expect_prompt(). Exception: st2000_resume does not | |
158 | wait for the prompt, because the terminal is being handed over | |
159 | to the inferior. However, the next thing which happens after that | |
160 | is a st2000_wait which does wait for the prompt. | |
161 | Note that this includes abnormal exit, e.g. error(). This is | |
162 | necessary to prevent getting into states from which we can't | |
163 | recover. */ | |
164 | static void | |
165 | expect_prompt(discard) | |
166 | int discard; | |
167 | { | |
168 | #if defined (LOG_FILE) | |
169 | /* This is a convenient place to do this. The idea is to do it often | |
170 | enough that we never lose much data if we terminate abnormally. */ | |
171 | fflush(log_file); | |
172 | #endif | |
173 | expect ("dbug> ", discard); | |
174 | } | |
175 | ||
176 | /* Get a hex digit from the remote system & return its value. | |
177 | If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ | |
178 | static int | |
179 | get_hex_digit(ignore_space) | |
180 | int ignore_space; | |
181 | { | |
182 | int ch; | |
183 | while (1) | |
184 | { | |
185 | ch = readchar(timeout); | |
186 | if (ch >= '0' && ch <= '9') | |
187 | return ch - '0'; | |
188 | else if (ch >= 'A' && ch <= 'F') | |
189 | return ch - 'A' + 10; | |
190 | else if (ch >= 'a' && ch <= 'f') | |
191 | return ch - 'a' + 10; | |
192 | else if (ch == ' ' && ignore_space) | |
193 | ; | |
194 | else | |
195 | { | |
196 | expect_prompt(1); | |
197 | error("Invalid hex digit from remote system."); | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
202 | /* Get a byte from stdebug and put it in *BYT. Accept any number | |
203 | leading spaces. */ | |
204 | static void | |
205 | get_hex_byte (byt) | |
206 | char *byt; | |
207 | { | |
208 | int val; | |
209 | ||
210 | val = get_hex_digit (1) << 4; | |
211 | val |= get_hex_digit (0); | |
212 | *byt = val; | |
213 | } | |
214 | ||
215 | /* Get N 32-bit words from remote, each preceded by a space, | |
216 | and put them in registers starting at REGNO. */ | |
217 | static void | |
218 | get_hex_regs (n, regno) | |
219 | int n; | |
220 | int regno; | |
221 | { | |
222 | long val; | |
223 | int i; | |
224 | ||
225 | for (i = 0; i < n; i++) | |
226 | { | |
227 | int j; | |
228 | ||
229 | val = 0; | |
230 | for (j = 0; j < 8; j++) | |
231 | val = (val << 4) + get_hex_digit (j == 0); | |
232 | supply_register (regno++, (char *) &val); | |
233 | } | |
234 | } | |
235 | ||
236 | /* This is called not only when we first attach, but also when the | |
237 | user types "run" after having attached. */ | |
238 | static void | |
239 | st2000_create_inferior (execfile, args, env) | |
240 | char *execfile; | |
241 | char *args; | |
242 | char **env; | |
243 | { | |
244 | int entry_pt; | |
245 | ||
246 | if (args && *args) | |
247 | error("Can't pass arguments to remote STDEBUG process"); | |
248 | ||
249 | if (execfile == 0 || exec_bfd == 0) | |
250 | error("No exec file specified"); | |
251 | ||
252 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
253 | ||
91c87211 JK |
254 | /* The "process" (board) is already stopped awaiting our commands, and |
255 | the program is already downloaded. We just set its PC and go. */ | |
256 | ||
257 | clear_proceed_status (); | |
258 | ||
259 | /* Tell wait_for_inferior that we've started a new process. */ | |
260 | init_wait_for_inferior (); | |
261 | ||
262 | /* Set up the "saved terminal modes" of the inferior | |
263 | based on what modes we are starting it with. */ | |
264 | target_terminal_init (); | |
265 | ||
266 | /* Install inferior's terminal modes. */ | |
267 | target_terminal_inferior (); | |
268 | ||
269 | /* insert_step_breakpoint (); FIXME, do we need this? */ | |
270 | proceed ((CORE_ADDR)entry_pt, -1, 0); /* Let 'er rip... */ | |
271 | } | |
272 | ||
273 | /* Open a connection to a remote debugger. | |
274 | NAME is the filename used for communication. */ | |
275 | ||
276 | static int baudrate = 9600; | |
277 | static char dev_name[100]; | |
278 | ||
279 | static void | |
280 | st2000_open(args, from_tty) | |
281 | char *args; | |
282 | int from_tty; | |
283 | { | |
284 | int n; | |
285 | char junk[100]; | |
286 | ||
287 | target_preopen(from_tty); | |
288 | ||
289 | n = sscanf(args, " %s %d %s", dev_name, &baudrate, junk); | |
290 | ||
291 | if (n != 2) | |
292 | error("Bad arguments. Usage: target st2000 <device> <speed>\n\ | |
293 | or target st2000 <host> <port>\n"); | |
294 | ||
295 | st2000_close(0); | |
296 | ||
297 | st2000_desc = SERIAL_OPEN(dev_name); | |
298 | ||
299 | if (!st2000_desc) | |
300 | perror_with_name(dev_name); | |
301 | ||
302 | SERIAL_SETBAUDRATE(st2000_desc, baudrate); | |
303 | ||
304 | SERIAL_RAW(st2000_desc); | |
305 | ||
306 | push_target(&st2000_ops); | |
307 | ||
308 | #if defined (LOG_FILE) | |
309 | log_file = fopen (LOG_FILE, "w"); | |
310 | if (log_file == NULL) | |
311 | perror_with_name (LOG_FILE); | |
312 | #endif | |
313 | ||
314 | /* Hello? Are you there? */ | |
315 | printf_stdebug("\003"); /* ^C wakes up dbug */ | |
316 | ||
317 | expect_prompt(1); | |
318 | ||
319 | if (from_tty) | |
320 | printf("Remote %s connected to %s\n", target_shortname, | |
321 | dev_name); | |
322 | } | |
323 | ||
324 | /* Close out all files and local state before this target loses control. */ | |
325 | ||
326 | static void | |
327 | st2000_close (quitting) | |
328 | int quitting; | |
329 | { | |
330 | SERIAL_CLOSE(st2000_desc); | |
331 | ||
332 | #if defined (LOG_FILE) | |
333 | if (log_file) { | |
334 | if (ferror(log_file)) | |
335 | fprintf(stderr, "Error writing log file.\n"); | |
336 | if (fclose(log_file) != 0) | |
337 | fprintf(stderr, "Error closing log file.\n"); | |
338 | } | |
339 | #endif | |
340 | } | |
341 | ||
342 | /* Terminate the open connection to the remote debugger. | |
343 | Use this when you want to detach and do something else | |
344 | with your gdb. */ | |
345 | static void | |
346 | st2000_detach (from_tty) | |
347 | int from_tty; | |
348 | { | |
349 | pop_target(); /* calls st2000_close to do the real work */ | |
350 | if (from_tty) | |
351 | printf ("Ending remote %s debugging\n", target_shortname); | |
352 | } | |
353 | ||
354 | /* Tell the remote machine to resume. */ | |
355 | ||
356 | static void | |
25286543 SG |
357 | st2000_resume (pid, step, sig) |
358 | int pid, step, sig; | |
91c87211 JK |
359 | { |
360 | if (step) | |
361 | { | |
362 | printf_stdebug ("ST\r"); | |
363 | /* Wait for the echo. */ | |
364 | expect ("ST\r", 1); | |
365 | } | |
366 | else | |
367 | { | |
368 | printf_stdebug ("GO\r"); | |
369 | /* Swallow the echo. */ | |
370 | expect ("GO\r", 1); | |
371 | } | |
372 | } | |
373 | ||
374 | /* Wait until the remote machine stops, then return, | |
375 | storing status in STATUS just as `wait' would. */ | |
376 | ||
377 | static int | |
378 | st2000_wait (status) | |
379 | WAITTYPE *status; | |
380 | { | |
381 | int old_timeout = timeout; | |
382 | ||
383 | WSETEXIT ((*status), 0); | |
384 | ||
385 | timeout = 0; /* Don't time out -- user program is running. */ | |
386 | ||
387 | expect_prompt(0); /* Wait for prompt, outputting extraneous text */ | |
388 | ||
389 | WSETSTOP ((*status), SIGTRAP); | |
390 | ||
391 | timeout = old_timeout; | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | /* Return the name of register number REGNO in the form input and output by | |
397 | STDEBUG. Currently, REGISTER_NAMES just happens to contain exactly what | |
398 | STDEBUG wants. Lets take advantage of that just as long as possible! */ | |
399 | ||
400 | static char * | |
401 | get_reg_name (regno) | |
402 | int regno; | |
403 | { | |
404 | static char buf[50]; | |
405 | const char *p; | |
406 | char *b; | |
407 | ||
408 | b = buf; | |
409 | ||
410 | for (p = reg_names[regno]; *p; p++) | |
411 | *b++ = toupper(*p); | |
412 | *b = '\000'; | |
413 | ||
414 | return buf; | |
415 | } | |
416 | ||
417 | /* Read the remote registers into the block REGS. */ | |
418 | ||
419 | static void | |
420 | st2000_fetch_registers () | |
421 | { | |
422 | int regno; | |
423 | ||
424 | /* Yeah yeah, I know this is horribly inefficient. But it isn't done | |
425 | very often... I'll clean it up later. */ | |
426 | ||
427 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
428 | st2000_fetch_register(regno); | |
429 | } | |
430 | ||
431 | /* Fetch register REGNO, or all registers if REGNO is -1. | |
432 | Returns errno value. */ | |
433 | static void | |
434 | st2000_fetch_register (regno) | |
435 | int regno; | |
436 | { | |
437 | if (regno == -1) | |
438 | st2000_fetch_registers (); | |
439 | else | |
440 | { | |
441 | char *name = get_reg_name (regno); | |
442 | printf_stdebug ("DR %s\r", name); | |
443 | expect (name, 1); | |
444 | expect (" : ", 1); | |
445 | get_hex_regs (1, regno); | |
446 | expect_prompt (1); | |
447 | } | |
448 | return; | |
449 | } | |
450 | ||
451 | /* Store the remote registers from the contents of the block REGS. */ | |
452 | ||
453 | static void | |
454 | st2000_store_registers () | |
455 | { | |
456 | int regno; | |
457 | ||
458 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
459 | st2000_store_register(regno); | |
460 | ||
461 | registers_changed (); | |
462 | } | |
463 | ||
464 | /* Store register REGNO, or all if REGNO == 0. | |
465 | Return errno value. */ | |
466 | static void | |
467 | st2000_store_register (regno) | |
468 | int regno; | |
469 | { | |
470 | if (regno == -1) | |
471 | st2000_store_registers (); | |
472 | else | |
473 | { | |
474 | printf_stdebug ("PR %s %x\r", get_reg_name (regno), | |
475 | read_register (regno)); | |
476 | ||
477 | expect_prompt (1); | |
478 | } | |
479 | } | |
480 | ||
481 | /* Get ready to modify the registers array. On machines which store | |
482 | individual registers, this doesn't need to do anything. On machines | |
483 | which store all the registers in one fell swoop, this makes sure | |
484 | that registers contains all the registers from the program being | |
485 | debugged. */ | |
486 | ||
487 | static void | |
488 | st2000_prepare_to_store () | |
489 | { | |
490 | /* Do nothing, since we can store individual regs */ | |
491 | } | |
492 | ||
493 | static void | |
494 | st2000_files_info () | |
495 | { | |
496 | printf ("\tAttached to %s at %d baud.\n", | |
497 | dev_name, baudrate); | |
498 | } | |
499 | ||
500 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
501 | to inferior's memory at MEMADDR. Returns length moved. */ | |
502 | static int | |
503 | st2000_write_inferior_memory (memaddr, myaddr, len) | |
504 | CORE_ADDR memaddr; | |
505 | unsigned char *myaddr; | |
506 | int len; | |
507 | { | |
508 | int i; | |
509 | ||
510 | for (i = 0; i < len; i++) | |
511 | { | |
512 | printf_stdebug ("PM.B %x %x\r", memaddr + i, myaddr[i]); | |
513 | expect_prompt (1); | |
514 | } | |
515 | return len; | |
516 | } | |
517 | ||
518 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
519 | at debugger address MYADDR. Returns length moved. */ | |
520 | static int | |
521 | st2000_read_inferior_memory(memaddr, myaddr, len) | |
522 | CORE_ADDR memaddr; | |
523 | char *myaddr; | |
524 | int len; | |
525 | { | |
526 | int i; | |
527 | ||
528 | /* Number of bytes read so far. */ | |
529 | int count; | |
530 | ||
531 | /* Starting address of this pass. */ | |
532 | unsigned long startaddr; | |
533 | ||
534 | /* Number of bytes to read in this pass. */ | |
535 | int len_this_pass; | |
536 | ||
537 | /* Note that this code works correctly if startaddr is just less | |
538 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
539 | thing). That is, something like | |
540 | st2000_read_bytes (CORE_ADDR_MAX - 4, foo, 4) | |
541 | works--it never adds len to memaddr and gets 0. */ | |
542 | /* However, something like | |
543 | st2000_read_bytes (CORE_ADDR_MAX - 3, foo, 4) | |
544 | doesn't need to work. Detect it and give up if there's an attempt | |
545 | to do that. */ | |
546 | if (((memaddr - 1) + len) < memaddr) { | |
547 | errno = EIO; | |
548 | return 0; | |
549 | } | |
550 | ||
551 | startaddr = memaddr; | |
552 | count = 0; | |
553 | while (count < len) | |
554 | { | |
555 | len_this_pass = 16; | |
556 | if ((startaddr % 16) != 0) | |
557 | len_this_pass -= startaddr % 16; | |
558 | if (len_this_pass > (len - count)) | |
559 | len_this_pass = (len - count); | |
560 | ||
561 | printf_stdebug ("DI.L %x %x\r", startaddr, len_this_pass); | |
562 | expect (": ", 1); | |
563 | ||
564 | for (i = 0; i < len_this_pass; i++) | |
565 | get_hex_byte (&myaddr[count++]); | |
566 | ||
567 | expect_prompt (1); | |
568 | ||
569 | startaddr += len_this_pass; | |
570 | } | |
571 | return len; | |
572 | } | |
573 | ||
574 | /* FIXME-someday! Merge these two. */ | |
575 | static int | |
576 | st2000_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
577 | CORE_ADDR memaddr; | |
578 | char *myaddr; | |
579 | int len; | |
580 | int write; | |
581 | struct target_ops *target; /* ignored */ | |
582 | { | |
583 | if (write) | |
584 | return st2000_write_inferior_memory (memaddr, myaddr, len); | |
585 | else | |
586 | return st2000_read_inferior_memory (memaddr, myaddr, len); | |
587 | } | |
588 | ||
589 | static void | |
590 | st2000_kill (args, from_tty) | |
591 | char *args; | |
592 | int from_tty; | |
593 | { | |
594 | return; /* Ignore attempts to kill target system */ | |
595 | } | |
596 | ||
597 | /* Clean up when a program exits. | |
598 | ||
599 | The program actually lives on in the remote processor's RAM, and may be | |
600 | run again without a download. Don't leave it full of breakpoint | |
601 | instructions. */ | |
602 | ||
603 | static void | |
604 | st2000_mourn_inferior () | |
605 | { | |
606 | remove_breakpoints (); | |
607 | unpush_target (&st2000_ops); | |
608 | generic_mourn_inferior (); /* Do all the proper things now */ | |
609 | } | |
610 | ||
611 | #define MAX_STDEBUG_BREAKPOINTS 16 | |
612 | ||
613 | extern int memory_breakpoint_size; | |
614 | static CORE_ADDR breakaddr[MAX_STDEBUG_BREAKPOINTS] = {0}; | |
615 | ||
616 | static int | |
617 | st2000_insert_breakpoint (addr, shadow) | |
618 | CORE_ADDR addr; | |
619 | char *shadow; | |
620 | { | |
621 | int i; | |
622 | ||
623 | for (i = 0; i <= MAX_STDEBUG_BREAKPOINTS; i++) | |
624 | if (breakaddr[i] == 0) | |
625 | { | |
626 | breakaddr[i] = addr; | |
627 | ||
628 | st2000_read_inferior_memory(addr, shadow, memory_breakpoint_size); | |
629 | printf_stdebug("BR %x H\r", addr); | |
630 | expect_prompt(1); | |
631 | return 0; | |
632 | } | |
633 | ||
634 | fprintf(stderr, "Too many breakpoints (> 16) for STDBUG\n"); | |
635 | return 1; | |
636 | } | |
637 | ||
638 | static int | |
639 | st2000_remove_breakpoint (addr, shadow) | |
640 | CORE_ADDR addr; | |
641 | char *shadow; | |
642 | { | |
643 | int i; | |
644 | ||
645 | for (i = 0; i < MAX_STDEBUG_BREAKPOINTS; i++) | |
646 | if (breakaddr[i] == addr) | |
647 | { | |
648 | breakaddr[i] = 0; | |
649 | ||
650 | printf_stdebug("CB %d\r", i); | |
651 | expect_prompt(1); | |
652 | return 0; | |
653 | } | |
654 | ||
655 | fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr); | |
656 | return 1; | |
657 | } | |
658 | ||
659 | ||
660 | /* Put a command string, in args, out to STDBUG. Output from STDBUG is placed | |
661 | on the users terminal until the prompt is seen. */ | |
662 | ||
663 | static void | |
664 | st2000_command (args, fromtty) | |
665 | char *args; | |
666 | int fromtty; | |
667 | { | |
668 | if (!st2000_desc) | |
669 | error("st2000 target not open."); | |
670 | ||
671 | if (!args) | |
672 | error("Missing command."); | |
673 | ||
674 | printf_stdebug("%s\r", args); | |
675 | expect_prompt(0); | |
676 | } | |
677 | ||
678 | /* Connect the user directly to STDBUG. This command acts just like the | |
679 | 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */ | |
680 | ||
681 | /*static struct ttystate ttystate;*/ | |
682 | ||
683 | static void | |
684 | cleanup_tty() | |
685 | { | |
686 | printf("\r\n[Exiting connect mode]\r\n"); | |
687 | /* SERIAL_RESTORE(0, &ttystate);*/ | |
688 | } | |
689 | ||
690 | #if 0 | |
691 | /* This all should now be in serial.c */ | |
692 | ||
693 | static void | |
694 | connect_command (args, fromtty) | |
695 | char *args; | |
696 | int fromtty; | |
697 | { | |
698 | fd_set readfds; | |
699 | int numfds; | |
700 | int c; | |
701 | char cur_esc = 0; | |
702 | ||
703 | dont_repeat(); | |
704 | ||
705 | if (st2000_desc < 0) | |
706 | error("st2000 target not open."); | |
707 | ||
708 | if (args) | |
709 | fprintf("This command takes no args. They have been ignored.\n"); | |
710 | ||
711 | printf("[Entering connect mode. Use ~. or ~^D to escape]\n"); | |
712 | ||
713 | serial_raw(0, &ttystate); | |
714 | ||
715 | make_cleanup(cleanup_tty, 0); | |
716 | ||
717 | FD_ZERO(&readfds); | |
718 | ||
719 | while (1) | |
720 | { | |
721 | do | |
722 | { | |
723 | FD_SET(0, &readfds); | |
724 | FD_SET(st2000_desc, &readfds); | |
725 | numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0); | |
726 | } | |
727 | while (numfds == 0); | |
728 | ||
729 | if (numfds < 0) | |
730 | perror_with_name("select"); | |
731 | ||
732 | if (FD_ISSET(0, &readfds)) | |
733 | { /* tty input, send to stdebug */ | |
734 | c = getchar(); | |
735 | if (c < 0) | |
736 | perror_with_name("connect"); | |
737 | ||
738 | printf_stdebug("%c", c); | |
739 | switch (cur_esc) | |
740 | { | |
741 | case 0: | |
742 | if (c == '\r') | |
743 | cur_esc = c; | |
744 | break; | |
745 | case '\r': | |
746 | if (c == '~') | |
747 | cur_esc = c; | |
748 | else | |
749 | cur_esc = 0; | |
750 | break; | |
751 | case '~': | |
752 | if (c == '.' || c == '\004') | |
753 | return; | |
754 | else | |
755 | cur_esc = 0; | |
756 | } | |
757 | } | |
758 | ||
759 | if (FD_ISSET(st2000_desc, &readfds)) | |
760 | { | |
761 | while (1) | |
762 | { | |
763 | c = readchar(0); | |
764 | if (c < 0) | |
765 | break; | |
766 | putchar(c); | |
767 | } | |
768 | fflush(stdout); | |
769 | } | |
770 | } | |
771 | } | |
772 | #endif /* 0 */ | |
773 | ||
774 | /* Define the target subroutine names */ | |
775 | ||
776 | struct target_ops st2000_ops = { | |
777 | "st2000", | |
778 | "Remote serial Tandem ST2000 target", | |
779 | "Use a remote computer running STDEBUG connected by a serial line,\n\ | |
780 | or a network connection.\n\ | |
781 | Arguments are the name of the device for the serial line,\n\ | |
782 | the speed to connect at in bits per second.", | |
783 | st2000_open, | |
784 | st2000_close, | |
785 | 0, | |
786 | st2000_detach, | |
787 | st2000_resume, | |
788 | st2000_wait, | |
789 | st2000_fetch_register, | |
790 | st2000_store_register, | |
791 | st2000_prepare_to_store, | |
792 | st2000_xfer_inferior_memory, | |
793 | st2000_files_info, | |
794 | st2000_insert_breakpoint, | |
795 | st2000_remove_breakpoint, /* Breakpoints */ | |
796 | 0, | |
797 | 0, | |
798 | 0, | |
799 | 0, | |
800 | 0, /* Terminal handling */ | |
801 | st2000_kill, | |
802 | 0, /* load */ | |
803 | 0, /* lookup_symbol */ | |
804 | st2000_create_inferior, | |
805 | st2000_mourn_inferior, | |
806 | 0, /* can_run */ | |
807 | 0, /* notice_signals */ | |
808 | process_stratum, | |
809 | 0, /* next */ | |
810 | 1, | |
811 | 1, | |
812 | 1, | |
813 | 1, | |
814 | 1, /* all mem, mem, stack, regs, exec */ | |
815 | 0, | |
816 | 0, /* Section pointers */ | |
817 | OPS_MAGIC, /* Always the last thing */ | |
818 | }; | |
819 | ||
820 | void | |
821 | _initialize_remote_st2000 () | |
822 | { | |
823 | add_target (&st2000_ops); | |
824 | add_com ("st2000 <command>", class_obscure, st2000_command, | |
825 | "Send a command to the STDBUG monitor."); | |
826 | add_com ("connect", class_obscure, connect_command, | |
827 | "Connect the terminal directly up to the STDBUG command monitor.\n\ | |
828 | Use <CR>~. or <CR>~^D to break out."); | |
829 | } |