Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Remote debugging interface for Tandem ST2000 phone switch, for GDB. |
0a65a603 AC |
2 | |
3 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, | |
4 | 2001, 2002 Free Software Foundation, Inc. | |
5 | ||
c906108c SS |
6 | Contributed by Cygnus Support. Written by Jim Kingdon for Cygnus. |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
24 | |
25 | /* This file was derived from remote-eb.c, which did a similar job, but for | |
26 | an AMD-29K running EBMON. That file was in turn derived from remote.c | |
27 | as mentioned in the following comment (left in for comic relief): | |
28 | ||
c5aa993b | 29 | "This is like remote.c but is for an esoteric situation-- |
c906108c SS |
30 | having an a29k board in a PC hooked up to a unix machine with |
31 | a serial line, and running ctty com1 on the PC, through which | |
32 | the unix machine can run ebmon. Not to mention that the PC | |
33 | has PC/NFS, so it can access the same executables that gdb can, | |
34 | over the net in real time." | |
35 | ||
36 | In reality, this module talks to a debug monitor called 'STDEBUG', which | |
37 | runs in a phone switch. We communicate with STDEBUG via either a direct | |
38 | serial line, or a TCP (or possibly TELNET) stream to a terminal multiplexor, | |
90c065fb | 39 | which in turn talks to the phone switch. */ |
c906108c SS |
40 | |
41 | #include "defs.h" | |
42 | #include "gdbcore.h" | |
43 | #include "target.h" | |
43ff13b4 | 44 | #include "gdb_string.h" |
9846de1b | 45 | #include <sys/types.h> |
c906108c | 46 | #include "serial.h" |
4e052eda | 47 | #include "regcache.h" |
c906108c | 48 | |
c5aa993b | 49 | extern struct target_ops st2000_ops; /* Forward declaration */ |
c906108c | 50 | |
c5aa993b JM |
51 | static void st2000_close (); |
52 | static void st2000_fetch_register (); | |
53 | static void st2000_store_register (); | |
c906108c SS |
54 | |
55 | #define LOG_FILE "st2000.log" | |
56 | #if defined (LOG_FILE) | |
57 | FILE *log_file; | |
58 | #endif | |
59 | ||
60 | static int timeout = 24; | |
61 | ||
62 | /* Descriptor for I/O to remote machine. Initialize it to -1 so that | |
63 | st2000_open knows that we don't have a file open when the program | |
64 | starts. */ | |
65 | ||
819cc324 | 66 | static struct serial *st2000_desc; |
c906108c SS |
67 | |
68 | /* Send data to stdebug. Works just like printf. */ | |
69 | ||
70 | static void | |
c5aa993b | 71 | printf_stdebug (char *pattern,...) |
c906108c SS |
72 | { |
73 | va_list args; | |
74 | char buf[200]; | |
75 | ||
c5aa993b | 76 | va_start (args, pattern); |
c906108c | 77 | |
c5aa993b JM |
78 | vsprintf (buf, pattern, args); |
79 | va_end (args); | |
c906108c | 80 | |
2cd58942 | 81 | if (serial_write (st2000_desc, buf, strlen (buf))) |
f8d17dc5 PM |
82 | fprintf_unfiltered (gdb_stderr, "serial_write failed: %s\n", |
83 | safe_strerror (errno)); | |
c906108c SS |
84 | } |
85 | ||
86 | /* Read a character from the remote system, doing all the fancy timeout | |
87 | stuff. */ | |
88 | ||
89 | static int | |
fba45db2 | 90 | readchar (int timeout) |
c906108c SS |
91 | { |
92 | int c; | |
93 | ||
2cd58942 | 94 | c = serial_readchar (st2000_desc, timeout); |
c906108c SS |
95 | |
96 | #ifdef LOG_FILE | |
c5aa993b | 97 | putc (c & 0x7f, log_file); |
c906108c SS |
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 | ||
8a3fe4f8 | 108 | error (_("Timeout reading from remote system.")); |
c906108c SS |
109 | } |
110 | ||
e2e0b3e5 | 111 | perror_with_name (_("remote-st2000")); |
c906108c SS |
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 | |
fba45db2 | 118 | expect (char *string, int discard) |
c906108c SS |
119 | { |
120 | char *p = string; | |
121 | int c; | |
122 | ||
8edbea78 | 123 | immediate_quit++; |
c906108c SS |
124 | while (1) |
125 | { | |
c5aa993b | 126 | c = readchar (timeout); |
c906108c SS |
127 | if (c == *p++) |
128 | { | |
129 | if (*p == '\0') | |
130 | { | |
8edbea78 | 131 | immediate_quit--; |
c906108c SS |
132 | return; |
133 | } | |
134 | } | |
135 | else | |
136 | { | |
137 | if (!discard) | |
138 | { | |
c5aa993b JM |
139 | fwrite (string, 1, (p - 1) - string, stdout); |
140 | putchar ((char) c); | |
141 | fflush (stdout); | |
c906108c SS |
142 | } |
143 | p = string; | |
144 | } | |
145 | } | |
146 | } | |
147 | ||
148 | /* Keep discarding input until we see the STDEBUG prompt. | |
149 | ||
150 | The convention for dealing with the prompt is that you | |
151 | o give your command | |
152 | o *then* wait for the prompt. | |
153 | ||
154 | Thus the last thing that a procedure does with the serial line | |
155 | will be an expect_prompt(). Exception: st2000_resume does not | |
156 | wait for the prompt, because the terminal is being handed over | |
157 | to the inferior. However, the next thing which happens after that | |
158 | is a st2000_wait which does wait for the prompt. | |
159 | Note that this includes abnormal exit, e.g. error(). This is | |
160 | necessary to prevent getting into states from which we can't | |
161 | recover. */ | |
162 | static void | |
fba45db2 | 163 | expect_prompt (int discard) |
c906108c SS |
164 | { |
165 | #if defined (LOG_FILE) | |
166 | /* This is a convenient place to do this. The idea is to do it often | |
167 | enough that we never lose much data if we terminate abnormally. */ | |
c5aa993b | 168 | fflush (log_file); |
c906108c SS |
169 | #endif |
170 | expect ("dbug> ", discard); | |
171 | } | |
172 | ||
173 | /* Get a hex digit from the remote system & return its value. | |
174 | If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ | |
175 | static int | |
fba45db2 | 176 | get_hex_digit (int ignore_space) |
c906108c SS |
177 | { |
178 | int ch; | |
179 | while (1) | |
180 | { | |
c5aa993b | 181 | ch = readchar (timeout); |
c906108c SS |
182 | if (ch >= '0' && ch <= '9') |
183 | return ch - '0'; | |
184 | else if (ch >= 'A' && ch <= 'F') | |
185 | return ch - 'A' + 10; | |
186 | else if (ch >= 'a' && ch <= 'f') | |
187 | return ch - 'a' + 10; | |
188 | else if (ch == ' ' && ignore_space) | |
189 | ; | |
190 | else | |
191 | { | |
c5aa993b | 192 | expect_prompt (1); |
8a3fe4f8 | 193 | error (_("Invalid hex digit from remote system.")); |
c906108c SS |
194 | } |
195 | } | |
196 | } | |
197 | ||
198 | /* Get a byte from stdebug and put it in *BYT. Accept any number | |
199 | leading spaces. */ | |
200 | static void | |
fba45db2 | 201 | get_hex_byte (char *byt) |
c906108c SS |
202 | { |
203 | int val; | |
204 | ||
205 | val = get_hex_digit (1) << 4; | |
206 | val |= get_hex_digit (0); | |
207 | *byt = val; | |
208 | } | |
209 | ||
210 | /* Get N 32-bit words from remote, each preceded by a space, | |
211 | and put them in registers starting at REGNO. */ | |
212 | static void | |
fba45db2 | 213 | get_hex_regs (int n, int regno) |
c906108c SS |
214 | { |
215 | long val; | |
216 | int i; | |
217 | ||
218 | for (i = 0; i < n; i++) | |
219 | { | |
220 | int j; | |
c5aa993b | 221 | |
c906108c SS |
222 | val = 0; |
223 | for (j = 0; j < 8; j++) | |
224 | val = (val << 4) + get_hex_digit (j == 0); | |
23a6d369 | 225 | regcache_raw_supply (current_regcache, regno++, (char *) &val); |
c906108c SS |
226 | } |
227 | } | |
228 | ||
229 | /* This is called not only when we first attach, but also when the | |
230 | user types "run" after having attached. */ | |
231 | static void | |
c27cda74 AC |
232 | st2000_create_inferior (char *execfile, char *args, char **env, |
233 | int from_tty) | |
c906108c SS |
234 | { |
235 | int entry_pt; | |
236 | ||
237 | if (args && *args) | |
8a3fe4f8 | 238 | error (_("Can't pass arguments to remote STDEBUG process")); |
c906108c SS |
239 | |
240 | if (execfile == 0 || exec_bfd == 0) | |
8a3fe4f8 | 241 | error (_("No executable file specified")); |
c906108c SS |
242 | |
243 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
244 | ||
245 | /* The "process" (board) is already stopped awaiting our commands, and | |
246 | the program is already downloaded. We just set its PC and go. */ | |
247 | ||
248 | clear_proceed_status (); | |
249 | ||
250 | /* Tell wait_for_inferior that we've started a new process. */ | |
251 | init_wait_for_inferior (); | |
252 | ||
253 | /* Set up the "saved terminal modes" of the inferior | |
254 | based on what modes we are starting it with. */ | |
255 | target_terminal_init (); | |
256 | ||
257 | /* Install inferior's terminal modes. */ | |
258 | target_terminal_inferior (); | |
259 | ||
260 | /* insert_step_breakpoint (); FIXME, do we need this? */ | |
261 | /* Let 'er rip... */ | |
c5aa993b | 262 | proceed ((CORE_ADDR) entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
c906108c SS |
263 | } |
264 | ||
265 | /* Open a connection to a remote debugger. | |
266 | NAME is the filename used for communication. */ | |
267 | ||
268 | static int baudrate = 9600; | |
269 | static char dev_name[100]; | |
270 | ||
271 | static void | |
fba45db2 | 272 | st2000_open (char *args, int from_tty) |
c906108c SS |
273 | { |
274 | int n; | |
275 | char junk[100]; | |
276 | ||
c5aa993b JM |
277 | target_preopen (from_tty); |
278 | ||
279 | n = sscanf (args, " %s %d %s", dev_name, &baudrate, junk); | |
c906108c SS |
280 | |
281 | if (n != 2) | |
8a3fe4f8 AC |
282 | error (_("Bad arguments. Usage: target st2000 <device> <speed>\n\ |
283 | or target st2000 <host> <port>\n")); | |
c906108c | 284 | |
c5aa993b | 285 | st2000_close (0); |
c906108c | 286 | |
2cd58942 | 287 | st2000_desc = serial_open (dev_name); |
c906108c SS |
288 | |
289 | if (!st2000_desc) | |
c5aa993b | 290 | perror_with_name (dev_name); |
c906108c | 291 | |
2cd58942 | 292 | if (serial_setbaudrate (st2000_desc, baudrate)) |
67dd5ca6 | 293 | { |
2cd58942 | 294 | serial_close (dev_name); |
67dd5ca6 FN |
295 | perror_with_name (dev_name); |
296 | } | |
c906108c | 297 | |
2cd58942 | 298 | serial_raw (st2000_desc); |
c906108c | 299 | |
c5aa993b | 300 | push_target (&st2000_ops); |
c906108c SS |
301 | |
302 | #if defined (LOG_FILE) | |
303 | log_file = fopen (LOG_FILE, "w"); | |
304 | if (log_file == NULL) | |
e2e0b3e5 | 305 | perror_with_name ((LOG_FILE)); |
c906108c SS |
306 | #endif |
307 | ||
308 | /* Hello? Are you there? */ | |
c5aa993b JM |
309 | printf_stdebug ("\003"); /* ^C wakes up dbug */ |
310 | ||
311 | expect_prompt (1); | |
c906108c SS |
312 | |
313 | if (from_tty) | |
c5aa993b JM |
314 | printf ("Remote %s connected to %s\n", target_shortname, |
315 | dev_name); | |
c906108c SS |
316 | } |
317 | ||
318 | /* Close out all files and local state before this target loses control. */ | |
319 | ||
320 | static void | |
fba45db2 | 321 | st2000_close (int quitting) |
c906108c | 322 | { |
2cd58942 | 323 | serial_close (st2000_desc); |
c906108c SS |
324 | |
325 | #if defined (LOG_FILE) | |
c5aa993b JM |
326 | if (log_file) |
327 | { | |
328 | if (ferror (log_file)) | |
f8d17dc5 | 329 | fprintf_unfiltered (gdb_stderr, "Error writing log file.\n"); |
c5aa993b | 330 | if (fclose (log_file) != 0) |
f8d17dc5 | 331 | fprintf_unfiltered (gdb_stderr, "Error closing log file.\n"); |
c5aa993b | 332 | } |
c906108c SS |
333 | #endif |
334 | } | |
335 | ||
336 | /* Terminate the open connection to the remote debugger. | |
337 | Use this when you want to detach and do something else | |
338 | with your gdb. */ | |
339 | static void | |
fba45db2 | 340 | st2000_detach (int from_tty) |
c906108c | 341 | { |
c5aa993b | 342 | pop_target (); /* calls st2000_close to do the real work */ |
c906108c SS |
343 | if (from_tty) |
344 | printf ("Ending remote %s debugging\n", target_shortname); | |
345 | } | |
c5aa993b | 346 | |
c906108c SS |
347 | /* Tell the remote machine to resume. */ |
348 | ||
349 | static void | |
39f77062 | 350 | st2000_resume (ptid_t ptid, int step, enum target_signal sig) |
c906108c SS |
351 | { |
352 | if (step) | |
353 | { | |
354 | printf_stdebug ("ST\r"); | |
355 | /* Wait for the echo. */ | |
356 | expect ("ST\r", 1); | |
357 | } | |
358 | else | |
359 | { | |
360 | printf_stdebug ("GO\r"); | |
361 | /* Swallow the echo. */ | |
362 | expect ("GO\r", 1); | |
363 | } | |
364 | } | |
365 | ||
366 | /* Wait until the remote machine stops, then return, | |
367 | storing status in STATUS just as `wait' would. */ | |
368 | ||
39f77062 KB |
369 | static ptid_t |
370 | st2000_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
371 | { |
372 | int old_timeout = timeout; | |
373 | ||
374 | status->kind = TARGET_WAITKIND_EXITED; | |
375 | status->value.integer = 0; | |
376 | ||
c5aa993b | 377 | timeout = 0; /* Don't time out -- user program is running. */ |
c906108c | 378 | |
c5aa993b | 379 | expect_prompt (0); /* Wait for prompt, outputting extraneous text */ |
c906108c SS |
380 | |
381 | status->kind = TARGET_WAITKIND_STOPPED; | |
382 | status->value.sig = TARGET_SIGNAL_TRAP; | |
383 | ||
384 | timeout = old_timeout; | |
385 | ||
39f77062 | 386 | return inferior_ptid; |
c906108c SS |
387 | } |
388 | ||
77949794 AC |
389 | /* Return the name of register number REGNO in the form input and |
390 | output by STDEBUG. Currently, REGISTER_NAME just happens return | |
391 | exactly what STDEBUG wants. Lets take advantage of that just as | |
392 | long as possible! */ | |
c906108c SS |
393 | |
394 | static char * | |
fba45db2 | 395 | get_reg_name (int regno) |
c906108c SS |
396 | { |
397 | static char buf[50]; | |
398 | const char *p; | |
399 | char *b; | |
400 | ||
401 | b = buf; | |
402 | ||
403 | for (p = REGISTER_NAME (regno); *p; p++) | |
c5aa993b | 404 | *b++ = toupper (*p); |
c906108c SS |
405 | *b = '\000'; |
406 | ||
407 | return buf; | |
408 | } | |
409 | ||
410 | /* Read the remote registers into the block REGS. */ | |
411 | ||
412 | static void | |
fba45db2 | 413 | st2000_fetch_registers (void) |
c906108c SS |
414 | { |
415 | int regno; | |
416 | ||
417 | /* Yeah yeah, I know this is horribly inefficient. But it isn't done | |
418 | very often... I'll clean it up later. */ | |
419 | ||
420 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
c5aa993b | 421 | st2000_fetch_register (regno); |
c906108c SS |
422 | } |
423 | ||
424 | /* Fetch register REGNO, or all registers if REGNO is -1. | |
425 | Returns errno value. */ | |
426 | static void | |
fba45db2 | 427 | st2000_fetch_register (int regno) |
c906108c SS |
428 | { |
429 | if (regno == -1) | |
430 | st2000_fetch_registers (); | |
431 | else | |
432 | { | |
433 | char *name = get_reg_name (regno); | |
434 | printf_stdebug ("DR %s\r", name); | |
435 | expect (name, 1); | |
436 | expect (" : ", 1); | |
437 | get_hex_regs (1, regno); | |
438 | expect_prompt (1); | |
439 | } | |
440 | return; | |
441 | } | |
442 | ||
443 | /* Store the remote registers from the contents of the block REGS. */ | |
444 | ||
445 | static void | |
fba45db2 | 446 | st2000_store_registers (void) |
c906108c SS |
447 | { |
448 | int regno; | |
449 | ||
450 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
c5aa993b | 451 | st2000_store_register (regno); |
c906108c SS |
452 | |
453 | registers_changed (); | |
454 | } | |
455 | ||
456 | /* Store register REGNO, or all if REGNO == 0. | |
457 | Return errno value. */ | |
458 | static void | |
fba45db2 | 459 | st2000_store_register (int regno) |
c906108c SS |
460 | { |
461 | if (regno == -1) | |
462 | st2000_store_registers (); | |
463 | else | |
464 | { | |
465 | printf_stdebug ("PR %s %x\r", get_reg_name (regno), | |
466 | read_register (regno)); | |
467 | ||
468 | expect_prompt (1); | |
469 | } | |
470 | } | |
471 | ||
472 | /* Get ready to modify the registers array. On machines which store | |
473 | individual registers, this doesn't need to do anything. On machines | |
474 | which store all the registers in one fell swoop, this makes sure | |
475 | that registers contains all the registers from the program being | |
476 | debugged. */ | |
477 | ||
478 | static void | |
fba45db2 | 479 | st2000_prepare_to_store (void) |
c906108c SS |
480 | { |
481 | /* Do nothing, since we can store individual regs */ | |
482 | } | |
483 | ||
484 | static void | |
fba45db2 | 485 | st2000_files_info (void) |
c906108c SS |
486 | { |
487 | printf ("\tAttached to %s at %d baud.\n", | |
488 | dev_name, baudrate); | |
489 | } | |
490 | ||
491 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
492 | to inferior's memory at MEMADDR. Returns length moved. */ | |
493 | static int | |
fba45db2 | 494 | st2000_write_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
495 | { |
496 | int i; | |
497 | ||
498 | for (i = 0; i < len; i++) | |
499 | { | |
500 | printf_stdebug ("PM.B %x %x\r", memaddr + i, myaddr[i]); | |
501 | expect_prompt (1); | |
502 | } | |
503 | return len; | |
504 | } | |
505 | ||
506 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
507 | at debugger address MYADDR. Returns length moved. */ | |
508 | static int | |
fba45db2 | 509 | st2000_read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
510 | { |
511 | int i; | |
512 | ||
513 | /* Number of bytes read so far. */ | |
514 | int count; | |
515 | ||
516 | /* Starting address of this pass. */ | |
517 | unsigned long startaddr; | |
518 | ||
519 | /* Number of bytes to read in this pass. */ | |
520 | int len_this_pass; | |
521 | ||
522 | /* Note that this code works correctly if startaddr is just less | |
523 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
524 | thing). That is, something like | |
525 | st2000_read_bytes (CORE_ADDR_MAX - 4, foo, 4) | |
526 | works--it never adds len to memaddr and gets 0. */ | |
527 | /* However, something like | |
528 | st2000_read_bytes (CORE_ADDR_MAX - 3, foo, 4) | |
529 | doesn't need to work. Detect it and give up if there's an attempt | |
530 | to do that. */ | |
c5aa993b JM |
531 | if (((memaddr - 1) + len) < memaddr) |
532 | { | |
533 | errno = EIO; | |
534 | return 0; | |
535 | } | |
536 | ||
c906108c SS |
537 | startaddr = memaddr; |
538 | count = 0; | |
539 | while (count < len) | |
540 | { | |
541 | len_this_pass = 16; | |
542 | if ((startaddr % 16) != 0) | |
543 | len_this_pass -= startaddr % 16; | |
544 | if (len_this_pass > (len - count)) | |
545 | len_this_pass = (len - count); | |
546 | ||
547 | printf_stdebug ("DI.L %x %x\r", startaddr, len_this_pass); | |
548 | expect (": ", 1); | |
549 | ||
550 | for (i = 0; i < len_this_pass; i++) | |
551 | get_hex_byte (&myaddr[count++]); | |
552 | ||
553 | expect_prompt (1); | |
554 | ||
555 | startaddr += len_this_pass; | |
556 | } | |
557 | return len; | |
558 | } | |
559 | ||
832c69cf KB |
560 | /* Transfer LEN bytes between GDB address MYADDR and target address |
561 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
562 | otherwise transfer them from the target. TARGET is unused. | |
563 | ||
564 | Returns the number of bytes transferred. */ | |
565 | ||
c906108c | 566 | static int |
832c69cf | 567 | st2000_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len, |
0a65a603 AC |
568 | int write, struct mem_attrib *attrib, |
569 | struct target_ops *target) | |
c906108c SS |
570 | { |
571 | if (write) | |
572 | return st2000_write_inferior_memory (memaddr, myaddr, len); | |
573 | else | |
574 | return st2000_read_inferior_memory (memaddr, myaddr, len); | |
575 | } | |
576 | ||
577 | static void | |
fba45db2 | 578 | st2000_kill (char *args, int from_tty) |
c906108c | 579 | { |
c5aa993b | 580 | return; /* Ignore attempts to kill target system */ |
c906108c SS |
581 | } |
582 | ||
583 | /* Clean up when a program exits. | |
584 | ||
585 | The program actually lives on in the remote processor's RAM, and may be | |
586 | run again without a download. Don't leave it full of breakpoint | |
587 | instructions. */ | |
588 | ||
589 | static void | |
fba45db2 | 590 | st2000_mourn_inferior (void) |
c906108c SS |
591 | { |
592 | remove_breakpoints (); | |
593 | unpush_target (&st2000_ops); | |
594 | generic_mourn_inferior (); /* Do all the proper things now */ | |
595 | } | |
596 | ||
597 | #define MAX_STDEBUG_BREAKPOINTS 16 | |
598 | ||
c5aa993b JM |
599 | static CORE_ADDR breakaddr[MAX_STDEBUG_BREAKPOINTS] = |
600 | {0}; | |
c906108c SS |
601 | |
602 | static int | |
fba45db2 | 603 | st2000_insert_breakpoint (CORE_ADDR addr, char *shadow) |
c906108c SS |
604 | { |
605 | int i; | |
606 | CORE_ADDR bp_addr = addr; | |
607 | int bp_size = 0; | |
608 | ||
609 | BREAKPOINT_FROM_PC (&bp_addr, &bp_size); | |
610 | ||
611 | for (i = 0; i <= MAX_STDEBUG_BREAKPOINTS; i++) | |
612 | if (breakaddr[i] == 0) | |
613 | { | |
614 | breakaddr[i] = addr; | |
615 | ||
616 | st2000_read_inferior_memory (bp_addr, shadow, bp_size); | |
c5aa993b JM |
617 | printf_stdebug ("BR %x H\r", addr); |
618 | expect_prompt (1); | |
c906108c SS |
619 | return 0; |
620 | } | |
621 | ||
f8d17dc5 | 622 | fprintf_unfiltered (gdb_stderr, "Too many breakpoints (> 16) for STDBUG\n"); |
c906108c SS |
623 | return 1; |
624 | } | |
625 | ||
626 | static int | |
fba45db2 | 627 | st2000_remove_breakpoint (CORE_ADDR addr, char *shadow) |
c906108c SS |
628 | { |
629 | int i; | |
630 | ||
631 | for (i = 0; i < MAX_STDEBUG_BREAKPOINTS; i++) | |
632 | if (breakaddr[i] == addr) | |
633 | { | |
634 | breakaddr[i] = 0; | |
635 | ||
c5aa993b JM |
636 | printf_stdebug ("CB %d\r", i); |
637 | expect_prompt (1); | |
c906108c SS |
638 | return 0; |
639 | } | |
640 | ||
f8d17dc5 PM |
641 | fprintf_unfiltered (gdb_stderr, |
642 | "Can't find breakpoint associated with 0x%x\n", addr); | |
c906108c SS |
643 | return 1; |
644 | } | |
645 | ||
646 | ||
647 | /* Put a command string, in args, out to STDBUG. Output from STDBUG is placed | |
648 | on the users terminal until the prompt is seen. */ | |
649 | ||
650 | static void | |
fba45db2 | 651 | st2000_command (char *args, int fromtty) |
c906108c SS |
652 | { |
653 | if (!st2000_desc) | |
8a3fe4f8 | 654 | error (_("st2000 target not open.")); |
c5aa993b | 655 | |
c906108c | 656 | if (!args) |
8a3fe4f8 | 657 | error (_("Missing command.")); |
c5aa993b JM |
658 | |
659 | printf_stdebug ("%s\r", args); | |
660 | expect_prompt (0); | |
c906108c SS |
661 | } |
662 | ||
663 | /* Connect the user directly to STDBUG. This command acts just like the | |
664 | 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */ | |
665 | ||
c5aa993b | 666 | /*static struct ttystate ttystate; */ |
c906108c SS |
667 | |
668 | static void | |
fba45db2 | 669 | cleanup_tty (void) |
c906108c | 670 | { |
c5aa993b | 671 | printf ("\r\n[Exiting connect mode]\r\n"); |
2cd58942 | 672 | /* serial_restore(0, &ttystate); */ |
c906108c SS |
673 | } |
674 | ||
675 | #if 0 | |
676 | /* This all should now be in serial.c */ | |
677 | ||
678 | static void | |
fba45db2 | 679 | connect_command (char *args, int fromtty) |
c906108c SS |
680 | { |
681 | fd_set readfds; | |
682 | int numfds; | |
683 | int c; | |
684 | char cur_esc = 0; | |
685 | ||
c5aa993b | 686 | dont_repeat (); |
c906108c SS |
687 | |
688 | if (st2000_desc < 0) | |
8a3fe4f8 | 689 | error (_("st2000 target not open.")); |
c5aa993b | 690 | |
c906108c | 691 | if (args) |
c5aa993b | 692 | fprintf ("This command takes no args. They have been ignored.\n"); |
c906108c | 693 | |
c5aa993b | 694 | printf ("[Entering connect mode. Use ~. or ~^D to escape]\n"); |
c906108c | 695 | |
c5aa993b | 696 | serial_raw (0, &ttystate); |
c906108c | 697 | |
c5aa993b JM |
698 | make_cleanup (cleanup_tty, 0); |
699 | ||
700 | FD_ZERO (&readfds); | |
c906108c SS |
701 | |
702 | while (1) | |
703 | { | |
704 | do | |
705 | { | |
c5aa993b | 706 | FD_SET (0, &readfds); |
2cd58942 | 707 | FD_SET (deprecated_serial_fd (st2000_desc), &readfds); |
c5aa993b | 708 | numfds = select (sizeof (readfds) * 8, &readfds, 0, 0, 0); |
c906108c SS |
709 | } |
710 | while (numfds == 0); | |
711 | ||
712 | if (numfds < 0) | |
e2e0b3e5 | 713 | perror_with_name (("select")); |
c906108c | 714 | |
c5aa993b | 715 | if (FD_ISSET (0, &readfds)) |
c906108c | 716 | { /* tty input, send to stdebug */ |
c5aa993b | 717 | c = getchar (); |
c906108c | 718 | if (c < 0) |
e2e0b3e5 | 719 | perror_with_name (("connect")); |
c906108c | 720 | |
c5aa993b | 721 | printf_stdebug ("%c", c); |
c906108c SS |
722 | switch (cur_esc) |
723 | { | |
724 | case 0: | |
725 | if (c == '\r') | |
726 | cur_esc = c; | |
727 | break; | |
728 | case '\r': | |
729 | if (c == '~') | |
730 | cur_esc = c; | |
731 | else | |
732 | cur_esc = 0; | |
733 | break; | |
734 | case '~': | |
735 | if (c == '.' || c == '\004') | |
736 | return; | |
737 | else | |
738 | cur_esc = 0; | |
739 | } | |
740 | } | |
741 | ||
2cd58942 | 742 | if (FD_ISSET (deprecated_serial_fd (st2000_desc), &readfds)) |
c906108c SS |
743 | { |
744 | while (1) | |
745 | { | |
c5aa993b | 746 | c = readchar (0); |
c906108c SS |
747 | if (c < 0) |
748 | break; | |
c5aa993b | 749 | putchar (c); |
c906108c | 750 | } |
c5aa993b | 751 | fflush (stdout); |
c906108c SS |
752 | } |
753 | } | |
754 | } | |
755 | #endif /* 0 */ | |
756 | ||
757 | /* Define the target subroutine names */ | |
758 | ||
c5aa993b | 759 | struct target_ops st2000_ops; |
c906108c | 760 | |
c5aa993b JM |
761 | static void |
762 | init_st2000_ops (void) | |
c906108c | 763 | { |
c5aa993b JM |
764 | st2000_ops.to_shortname = "st2000"; |
765 | st2000_ops.to_longname = "Remote serial Tandem ST2000 target"; | |
766 | st2000_ops.to_doc = "Use a remote computer running STDEBUG connected by a serial line;\n\ | |
c906108c SS |
767 | or a network connection.\n\ |
768 | Arguments are the name of the device for the serial line,\n\ | |
c5aa993b JM |
769 | the speed to connect at in bits per second."; |
770 | st2000_ops.to_open = st2000_open; | |
771 | st2000_ops.to_close = st2000_close; | |
c5aa993b | 772 | st2000_ops.to_detach = st2000_detach; |
c5aa993b JM |
773 | st2000_ops.to_resume = st2000_resume; |
774 | st2000_ops.to_wait = st2000_wait; | |
c5aa993b JM |
775 | st2000_ops.to_fetch_registers = st2000_fetch_register; |
776 | st2000_ops.to_store_registers = st2000_store_register; | |
777 | st2000_ops.to_prepare_to_store = st2000_prepare_to_store; | |
c8e73a31 | 778 | st2000_ops.deprecated_xfer_memory = st2000_xfer_inferior_memory; |
c5aa993b JM |
779 | st2000_ops.to_files_info = st2000_files_info; |
780 | st2000_ops.to_insert_breakpoint = st2000_insert_breakpoint; | |
781 | st2000_ops.to_remove_breakpoint = st2000_remove_breakpoint; /* Breakpoints */ | |
c5aa993b | 782 | st2000_ops.to_kill = st2000_kill; |
c5aa993b | 783 | st2000_ops.to_create_inferior = st2000_create_inferior; |
c5aa993b | 784 | st2000_ops.to_mourn_inferior = st2000_mourn_inferior; |
c5aa993b | 785 | st2000_ops.to_stratum = process_stratum; |
c5aa993b JM |
786 | st2000_ops.to_has_all_memory = 1; |
787 | st2000_ops.to_has_memory = 1; | |
788 | st2000_ops.to_has_stack = 1; | |
789 | st2000_ops.to_has_registers = 1; | |
790 | st2000_ops.to_has_execution = 1; /* all mem, mem, stack, regs, exec */ | |
c5aa993b JM |
791 | st2000_ops.to_magic = OPS_MAGIC; /* Always the last thing */ |
792 | }; | |
c906108c SS |
793 | |
794 | void | |
fba45db2 | 795 | _initialize_remote_st2000 (void) |
c906108c | 796 | { |
c5aa993b | 797 | init_st2000_ops (); |
c906108c SS |
798 | add_target (&st2000_ops); |
799 | add_com ("st2000 <command>", class_obscure, st2000_command, | |
800 | "Send a command to the STDBUG monitor."); | |
801 | add_com ("connect", class_obscure, connect_command, | |
802 | "Connect the terminal directly up to the STDBUG command monitor.\n\ | |
803 | Use <CR>~. or <CR>~^D to break out."); | |
804 | } |