Commit | Line | Data |
---|---|---|
55488e9e | 1 | /* Remote debugging interface for Tandem ST2000 phone switch, for GDB. |
88cc9a36 SG |
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 | ||
55488e9e SG |
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-- | |
d7d35f00 | 26 | having an a29k board in a PC hooked up to a unix machine with |
88cc9a36 SG |
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, | |
55488e9e | 30 | over the net in real time." |
88cc9a36 | 31 | |
55488e9e SG |
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. */ | |
88cc9a36 | 36 | |
55488e9e SG |
37 | #include "defs.h" |
38 | #include "gdbcore.h" | |
88cc9a36 | 39 | #include "target.h" |
55488e9e SG |
40 | #include "wait.h" |
41 | #include <varargs.h> | |
42 | #include <signal.h> | |
43 | #include <string.h> | |
a0f9783e SG |
44 | #include <sys/types.h> |
45 | #include "serial.h" | |
88cc9a36 | 46 | |
55488e9e | 47 | extern struct target_ops st2000_ops; /* Forward declaration */ |
88cc9a36 | 48 | |
55488e9e SG |
49 | static void st2000_close(); |
50 | static void st2000_fetch_register(); | |
51 | static void st2000_store_register(); | |
88cc9a36 | 52 | |
55488e9e | 53 | #define LOG_FILE "st2000.log" |
88cc9a36 SG |
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 | |
55488e9e | 61 | st2000_open knows that we don't have a file open when the program |
88cc9a36 | 62 | starts. */ |
1724c671 SG |
63 | |
64 | static serial_t st2000_desc; | |
55488e9e | 65 | |
55488e9e SG |
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; | |
a0f9783e | 74 | char buf[200]; |
55488e9e SG |
75 | |
76 | va_start(args); | |
77 | ||
78 | pattern = va_arg(args, char *); | |
79 | ||
a0f9783e | 80 | vsprintf(buf, pattern, args); |
1724c671 SG |
81 | if (SERIAL_WRITE(st2000_desc, buf, strlen(buf))) |
82 | fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno)); | |
55488e9e | 83 | } |
88cc9a36 | 84 | |
1724c671 SG |
85 | /* Read a character from the remote system, doing all the fancy timeout |
86 | stuff. */ | |
87 | ||
88cc9a36 | 88 | static int |
a0f9783e SG |
89 | readchar(timeout) |
90 | int timeout; | |
88cc9a36 | 91 | { |
a0f9783e SG |
92 | int c; |
93 | ||
1724c671 | 94 | c = SERIAL_READCHAR(st2000_desc, timeout); |
a0f9783e SG |
95 | |
96 | #ifdef LOG_FILE | |
97 | putc(c & 0x7f, log_file); | |
98 | #endif | |
99 | ||
100 | if (c >= 0) | |
101 | return c & 0x7f; | |
102 | ||
1724c671 | 103 | if (c == SERIAL_TIMEOUT) |
88cc9a36 | 104 | { |
a0f9783e SG |
105 | if (timeout == 0) |
106 | return c; /* Polls shouldn't generate timeout errors */ | |
107 | ||
108 | error("Timeout reading from remote system."); | |
88cc9a36 | 109 | } |
88cc9a36 | 110 | |
a0f9783e | 111 | perror_with_name("remote-st2000"); |
88cc9a36 SG |
112 | } |
113 | ||
a0f9783e SG |
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. | |
88cc9a36 SG |
116 | Let the user break out immediately. */ |
117 | static void | |
a0f9783e | 118 | expect(string, discard) |
88cc9a36 | 119 | char *string; |
a0f9783e | 120 | int discard; |
88cc9a36 SG |
121 | { |
122 | char *p = string; | |
a0f9783e | 123 | int c; |
88cc9a36 SG |
124 | |
125 | immediate_quit = 1; | |
126 | while (1) | |
127 | { | |
a0f9783e SG |
128 | c = readchar(timeout); |
129 | if (c == *p++) | |
88cc9a36 | 130 | { |
88cc9a36 SG |
131 | if (*p == '\0') |
132 | { | |
133 | immediate_quit = 0; | |
134 | return; | |
135 | } | |
136 | } | |
137 | else | |
a0f9783e SG |
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 | } | |
88cc9a36 SG |
147 | } |
148 | } | |
149 | ||
55488e9e | 150 | /* Keep discarding input until we see the STDEBUG prompt. |
88cc9a36 SG |
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 | |
55488e9e | 157 | will be an expect_prompt(). Exception: st2000_resume does not |
88cc9a36 SG |
158 | wait for the prompt, because the terminal is being handed over |
159 | to the inferior. However, the next thing which happens after that | |
55488e9e | 160 | is a st2000_wait which does wait for the prompt. |
88cc9a36 SG |
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 | |
a0f9783e SG |
165 | expect_prompt(discard) |
166 | int discard; | |
88cc9a36 SG |
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. */ | |
a0f9783e | 171 | fflush(log_file); |
88cc9a36 | 172 | #endif |
a0f9783e | 173 | expect ("dbug> ", discard); |
88cc9a36 SG |
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 | |
a0f9783e | 179 | get_hex_digit(ignore_space) |
88cc9a36 SG |
180 | int ignore_space; |
181 | { | |
182 | int ch; | |
183 | while (1) | |
184 | { | |
a0f9783e | 185 | ch = readchar(timeout); |
88cc9a36 SG |
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 | { | |
a0f9783e SG |
196 | expect_prompt(1); |
197 | error("Invalid hex digit from remote system."); | |
88cc9a36 SG |
198 | } |
199 | } | |
200 | } | |
201 | ||
a0f9783e | 202 | /* Get a byte from stdebug and put it in *BYT. Accept any number |
88cc9a36 SG |
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); | |
55488e9e | 232 | supply_register (regno++, (char *) &val); |
88cc9a36 SG |
233 | } |
234 | } | |
235 | ||
88cc9a36 SG |
236 | /* This is called not only when we first attach, but also when the |
237 | user types "run" after having attached. */ | |
238 | static void | |
55488e9e | 239 | st2000_create_inferior (execfile, args, env) |
88cc9a36 SG |
240 | char *execfile; |
241 | char *args; | |
242 | char **env; | |
243 | { | |
244 | int entry_pt; | |
245 | ||
246 | if (args && *args) | |
a0f9783e | 247 | error("Can't pass arguments to remote STDEBUG process"); |
88cc9a36 SG |
248 | |
249 | if (execfile == 0 || exec_bfd == 0) | |
a0f9783e | 250 | error("No exec file specified"); |
88cc9a36 SG |
251 | |
252 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
253 | ||
254 | #ifdef CREATE_INFERIOR_HOOK | |
255 | CREATE_INFERIOR_HOOK (0); /* No process-ID */ | |
256 | #endif | |
257 | ||
88cc9a36 SG |
258 | /* The "process" (board) is already stopped awaiting our commands, and |
259 | the program is already downloaded. We just set its PC and go. */ | |
260 | ||
261 | clear_proceed_status (); | |
262 | ||
263 | /* Tell wait_for_inferior that we've started a new process. */ | |
264 | init_wait_for_inferior (); | |
265 | ||
266 | /* Set up the "saved terminal modes" of the inferior | |
267 | based on what modes we are starting it with. */ | |
268 | target_terminal_init (); | |
269 | ||
270 | /* Install inferior's terminal modes. */ | |
271 | target_terminal_inferior (); | |
272 | ||
273 | /* insert_step_breakpoint (); FIXME, do we need this? */ | |
274 | proceed ((CORE_ADDR)entry_pt, -1, 0); /* Let 'er rip... */ | |
275 | } | |
276 | ||
88cc9a36 | 277 | /* Open a connection to a remote debugger. |
55488e9e | 278 | NAME is the filename used for communication. */ |
88cc9a36 SG |
279 | |
280 | static int baudrate = 9600; | |
a0f9783e | 281 | static char dev_name[100]; |
55488e9e SG |
282 | |
283 | static void | |
a0f9783e SG |
284 | st2000_open(args, from_tty) |
285 | char *args; | |
88cc9a36 SG |
286 | int from_tty; |
287 | { | |
a0f9783e SG |
288 | int n; |
289 | char junk[100]; | |
88cc9a36 | 290 | |
a0f9783e | 291 | target_preopen(from_tty); |
88cc9a36 | 292 | |
a0f9783e | 293 | n = sscanf(args, " %s %d %s", dev_name, &baudrate, junk); |
88cc9a36 | 294 | |
a0f9783e SG |
295 | if (n != 2) |
296 | error("Bad arguments. Usage: target st2000 <device> <speed>\n\ | |
297 | or target st2000 <host> <port>\n"); | |
88cc9a36 | 298 | |
a0f9783e | 299 | st2000_close(0); |
88cc9a36 | 300 | |
1724c671 SG |
301 | st2000_desc = SERIAL_OPEN(dev_name); |
302 | ||
303 | if (!st2000_desc) | |
304 | perror_with_name(dev_name); | |
88cc9a36 | 305 | |
1724c671 SG |
306 | SERIAL_SETBAUDRATE(st2000_desc, baudrate); |
307 | ||
308 | SERIAL_RAW(st2000_desc); | |
88cc9a36 | 309 | |
a0f9783e | 310 | push_target(&st2000_ops); |
88cc9a36 SG |
311 | |
312 | #if defined (LOG_FILE) | |
313 | log_file = fopen (LOG_FILE, "w"); | |
314 | if (log_file == NULL) | |
315 | perror_with_name (LOG_FILE); | |
316 | #endif | |
317 | ||
318 | /* Hello? Are you there? */ | |
a0f9783e | 319 | printf_stdebug("\003"); /* ^C wakes up dbug */ |
88cc9a36 | 320 | |
a0f9783e | 321 | expect_prompt(1); |
55488e9e SG |
322 | |
323 | if (from_tty) | |
a0f9783e SG |
324 | printf("Remote %s connected to %s\n", target_shortname, |
325 | dev_name); | |
88cc9a36 SG |
326 | } |
327 | ||
328 | /* Close out all files and local state before this target loses control. */ | |
329 | ||
330 | static void | |
55488e9e | 331 | st2000_close (quitting) |
88cc9a36 SG |
332 | int quitting; |
333 | { | |
1724c671 | 334 | SERIAL_CLOSE(st2000_desc); |
88cc9a36 SG |
335 | |
336 | #if defined (LOG_FILE) | |
337 | if (log_file) { | |
a0f9783e SG |
338 | if (ferror(log_file)) |
339 | fprintf(stderr, "Error writing log file.\n"); | |
340 | if (fclose(log_file) != 0) | |
341 | fprintf(stderr, "Error closing log file.\n"); | |
88cc9a36 SG |
342 | } |
343 | #endif | |
344 | } | |
345 | ||
346 | /* Terminate the open connection to the remote debugger. | |
347 | Use this when you want to detach and do something else | |
348 | with your gdb. */ | |
55488e9e SG |
349 | static void |
350 | st2000_detach (from_tty) | |
88cc9a36 SG |
351 | int from_tty; |
352 | { | |
55488e9e | 353 | pop_target(); /* calls st2000_close to do the real work */ |
88cc9a36 SG |
354 | if (from_tty) |
355 | printf ("Ending remote %s debugging\n", target_shortname); | |
356 | } | |
357 | ||
358 | /* Tell the remote machine to resume. */ | |
359 | ||
55488e9e SG |
360 | static void |
361 | st2000_resume (step, sig) | |
88cc9a36 SG |
362 | int step, sig; |
363 | { | |
364 | if (step) | |
365 | { | |
55488e9e | 366 | printf_stdebug ("ST\r"); |
88cc9a36 | 367 | /* Wait for the echo. */ |
a0f9783e | 368 | expect ("ST\r", 1); |
88cc9a36 SG |
369 | } |
370 | else | |
371 | { | |
55488e9e SG |
372 | printf_stdebug ("GO\r"); |
373 | /* Swallow the echo. */ | |
a0f9783e | 374 | expect ("GO\r", 1); |
88cc9a36 SG |
375 | } |
376 | } | |
377 | ||
378 | /* Wait until the remote machine stops, then return, | |
379 | storing status in STATUS just as `wait' would. */ | |
380 | ||
55488e9e SG |
381 | static int |
382 | st2000_wait (status) | |
88cc9a36 SG |
383 | WAITTYPE *status; |
384 | { | |
88cc9a36 SG |
385 | int old_timeout = timeout; |
386 | ||
387 | WSETEXIT ((*status), 0); | |
388 | ||
88cc9a36 | 389 | timeout = 0; /* Don't time out -- user program is running. */ |
88cc9a36 | 390 | |
a0f9783e SG |
391 | expect_prompt(0); /* Wait for prompt, outputting extraneous text */ |
392 | ||
393 | WSETSTOP ((*status), SIGTRAP); | |
88cc9a36 | 394 | |
88cc9a36 SG |
395 | timeout = old_timeout; |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
55488e9e SG |
400 | /* Return the name of register number REGNO in the form input and output by |
401 | STDEBUG. Currently, REGISTER_NAMES just happens to contain exactly what | |
402 | STDEBUG wants. Lets take advantage of that just as long as possible! */ | |
88cc9a36 | 403 | |
88cc9a36 SG |
404 | static char * |
405 | get_reg_name (regno) | |
406 | int regno; | |
407 | { | |
55488e9e | 408 | static char buf[50]; |
ed3f6049 SG |
409 | const char *p; |
410 | char *b; | |
55488e9e SG |
411 | |
412 | b = buf; | |
413 | ||
414 | for (p = reg_names[regno]; *p; p++) | |
415 | *b++ = toupper(*p); | |
416 | *b = '\000'; | |
417 | ||
88cc9a36 SG |
418 | return buf; |
419 | } | |
420 | ||
421 | /* Read the remote registers into the block REGS. */ | |
422 | ||
423 | static void | |
55488e9e | 424 | st2000_fetch_registers () |
88cc9a36 | 425 | { |
55488e9e | 426 | int regno; |
88cc9a36 | 427 | |
55488e9e SG |
428 | /* Yeah yeah, I know this is horribly inefficient. But it isn't done |
429 | very often... I'll clean it up later. */ | |
88cc9a36 | 430 | |
55488e9e SG |
431 | for (regno = 0; regno <= PC_REGNUM; regno++) |
432 | st2000_fetch_register(regno); | |
88cc9a36 SG |
433 | } |
434 | ||
435 | /* Fetch register REGNO, or all registers if REGNO is -1. | |
436 | Returns errno value. */ | |
55488e9e SG |
437 | static void |
438 | st2000_fetch_register (regno) | |
88cc9a36 SG |
439 | int regno; |
440 | { | |
441 | if (regno == -1) | |
55488e9e | 442 | st2000_fetch_registers (); |
88cc9a36 SG |
443 | else |
444 | { | |
445 | char *name = get_reg_name (regno); | |
55488e9e | 446 | printf_stdebug ("DR %s\r", name); |
a0f9783e SG |
447 | expect (name, 1); |
448 | expect (" : ", 1); | |
88cc9a36 | 449 | get_hex_regs (1, regno); |
a0f9783e | 450 | expect_prompt (1); |
88cc9a36 SG |
451 | } |
452 | return; | |
453 | } | |
454 | ||
455 | /* Store the remote registers from the contents of the block REGS. */ | |
456 | ||
457 | static void | |
55488e9e | 458 | st2000_store_registers () |
88cc9a36 | 459 | { |
55488e9e | 460 | int regno; |
88cc9a36 | 461 | |
55488e9e SG |
462 | for (regno = 0; regno <= PC_REGNUM; regno++) |
463 | st2000_store_register(regno); | |
88cc9a36 | 464 | |
55488e9e | 465 | registers_changed (); |
88cc9a36 SG |
466 | } |
467 | ||
468 | /* Store register REGNO, or all if REGNO == 0. | |
469 | Return errno value. */ | |
55488e9e SG |
470 | static void |
471 | st2000_store_register (regno) | |
88cc9a36 SG |
472 | int regno; |
473 | { | |
474 | if (regno == -1) | |
55488e9e | 475 | st2000_store_registers (); |
88cc9a36 SG |
476 | else |
477 | { | |
55488e9e SG |
478 | printf_stdebug ("PR %s %x\r", get_reg_name (regno), |
479 | read_register (regno)); | |
480 | ||
a0f9783e | 481 | expect_prompt (1); |
88cc9a36 | 482 | } |
88cc9a36 SG |
483 | } |
484 | ||
485 | /* Get ready to modify the registers array. On machines which store | |
486 | individual registers, this doesn't need to do anything. On machines | |
487 | which store all the registers in one fell swoop, this makes sure | |
488 | that registers contains all the registers from the program being | |
489 | debugged. */ | |
490 | ||
55488e9e SG |
491 | static void |
492 | st2000_prepare_to_store () | |
88cc9a36 SG |
493 | { |
494 | /* Do nothing, since we can store individual regs */ | |
495 | } | |
496 | ||
55488e9e SG |
497 | static void |
498 | st2000_files_info () | |
88cc9a36 | 499 | { |
55488e9e SG |
500 | printf ("\tAttached to %s at %d baud.\n", |
501 | dev_name, baudrate); | |
88cc9a36 SG |
502 | } |
503 | ||
504 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
505 | to inferior's memory at MEMADDR. Returns length moved. */ | |
55488e9e SG |
506 | static int |
507 | st2000_write_inferior_memory (memaddr, myaddr, len) | |
88cc9a36 | 508 | CORE_ADDR memaddr; |
55488e9e | 509 | unsigned char *myaddr; |
88cc9a36 SG |
510 | int len; |
511 | { | |
512 | int i; | |
513 | ||
514 | for (i = 0; i < len; i++) | |
515 | { | |
55488e9e | 516 | printf_stdebug ("PM.B %x %x\r", memaddr + i, myaddr[i]); |
a0f9783e | 517 | expect_prompt (1); |
88cc9a36 SG |
518 | } |
519 | return len; | |
520 | } | |
521 | ||
522 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
523 | at debugger address MYADDR. Returns length moved. */ | |
55488e9e SG |
524 | static int |
525 | st2000_read_inferior_memory(memaddr, myaddr, len) | |
88cc9a36 SG |
526 | CORE_ADDR memaddr; |
527 | char *myaddr; | |
528 | int len; | |
529 | { | |
530 | int i; | |
531 | ||
532 | /* Number of bytes read so far. */ | |
533 | int count; | |
534 | ||
535 | /* Starting address of this pass. */ | |
536 | unsigned long startaddr; | |
537 | ||
538 | /* Number of bytes to read in this pass. */ | |
539 | int len_this_pass; | |
540 | ||
541 | /* Note that this code works correctly if startaddr is just less | |
542 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
543 | thing). That is, something like | |
55488e9e | 544 | st2000_read_bytes (CORE_ADDR_MAX - 4, foo, 4) |
88cc9a36 SG |
545 | works--it never adds len to memaddr and gets 0. */ |
546 | /* However, something like | |
55488e9e | 547 | st2000_read_bytes (CORE_ADDR_MAX - 3, foo, 4) |
88cc9a36 SG |
548 | doesn't need to work. Detect it and give up if there's an attempt |
549 | to do that. */ | |
550 | if (((memaddr - 1) + len) < memaddr) { | |
551 | errno = EIO; | |
552 | return 0; | |
553 | } | |
554 | ||
555 | startaddr = memaddr; | |
556 | count = 0; | |
557 | while (count < len) | |
558 | { | |
559 | len_this_pass = 16; | |
560 | if ((startaddr % 16) != 0) | |
561 | len_this_pass -= startaddr % 16; | |
562 | if (len_this_pass > (len - count)) | |
563 | len_this_pass = (len - count); | |
564 | ||
55488e9e | 565 | printf_stdebug ("DI.L %x %x\r", startaddr, len_this_pass); |
a0f9783e | 566 | expect (": ", 1); |
88cc9a36 SG |
567 | |
568 | for (i = 0; i < len_this_pass; i++) | |
569 | get_hex_byte (&myaddr[count++]); | |
570 | ||
a0f9783e | 571 | expect_prompt (1); |
88cc9a36 SG |
572 | |
573 | startaddr += len_this_pass; | |
574 | } | |
575 | return len; | |
576 | } | |
577 | ||
55488e9e SG |
578 | /* FIXME-someday! Merge these two. */ |
579 | static int | |
580 | st2000_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
581 | CORE_ADDR memaddr; | |
582 | char *myaddr; | |
583 | int len; | |
584 | int write; | |
585 | struct target_ops *target; /* ignored */ | |
586 | { | |
587 | if (write) | |
588 | return st2000_write_inferior_memory (memaddr, myaddr, len); | |
589 | else | |
590 | return st2000_read_inferior_memory (memaddr, myaddr, len); | |
591 | } | |
592 | ||
88cc9a36 | 593 | static void |
55488e9e | 594 | st2000_kill (args, from_tty) |
88cc9a36 SG |
595 | char *args; |
596 | int from_tty; | |
597 | { | |
598 | return; /* Ignore attempts to kill target system */ | |
599 | } | |
600 | ||
601 | /* Clean up when a program exits. | |
602 | ||
603 | The program actually lives on in the remote processor's RAM, and may be | |
604 | run again without a download. Don't leave it full of breakpoint | |
605 | instructions. */ | |
606 | ||
55488e9e SG |
607 | static void |
608 | st2000_mourn_inferior () | |
88cc9a36 SG |
609 | { |
610 | remove_breakpoints (); | |
611 | generic_mourn_inferior (); /* Do all the proper things now */ | |
612 | } | |
55488e9e SG |
613 | |
614 | #define MAX_STDEBUG_BREAKPOINTS 16 | |
615 | ||
616 | extern int memory_breakpoint_size; | |
617 | static CORE_ADDR breakaddr[MAX_STDEBUG_BREAKPOINTS] = {0}; | |
618 | ||
619 | static int | |
620 | st2000_insert_breakpoint (addr, shadow) | |
621 | CORE_ADDR addr; | |
622 | char *shadow; | |
623 | { | |
624 | int i; | |
625 | ||
626 | for (i = 0; i <= MAX_STDEBUG_BREAKPOINTS; i++) | |
627 | if (breakaddr[i] == 0) | |
628 | { | |
629 | breakaddr[i] = addr; | |
630 | ||
631 | st2000_read_inferior_memory(addr, shadow, memory_breakpoint_size); | |
632 | printf_stdebug("BR %x H\r", addr); | |
a0f9783e | 633 | expect_prompt(1); |
55488e9e SG |
634 | return 0; |
635 | } | |
636 | ||
637 | fprintf(stderr, "Too many breakpoints (> 16) for STDBUG\n"); | |
638 | return 1; | |
639 | } | |
640 | ||
641 | static int | |
642 | st2000_remove_breakpoint (addr, shadow) | |
643 | CORE_ADDR addr; | |
644 | char *shadow; | |
645 | { | |
646 | int i; | |
647 | ||
648 | for (i = 0; i < MAX_STDEBUG_BREAKPOINTS; i++) | |
649 | if (breakaddr[i] == addr) | |
650 | { | |
651 | breakaddr[i] = 0; | |
652 | ||
653 | printf_stdebug("CB %d\r", i); | |
a0f9783e | 654 | expect_prompt(1); |
55488e9e SG |
655 | return 0; |
656 | } | |
657 | ||
658 | fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr); | |
659 | return 1; | |
660 | } | |
661 | ||
a0f9783e SG |
662 | |
663 | /* Put a command string, in args, out to STDBUG. Output from STDBUG is placed | |
664 | on the users terminal until the prompt is seen. */ | |
665 | ||
666 | static void | |
667 | st2000_command (args, fromtty) | |
668 | char *args; | |
669 | int fromtty; | |
670 | { | |
1724c671 | 671 | if (!st2000_desc) |
a0f9783e SG |
672 | error("st2000 target not open."); |
673 | ||
674 | if (!args) | |
675 | error("Missing command."); | |
676 | ||
677 | printf_stdebug("%s\r", args); | |
678 | expect_prompt(0); | |
679 | } | |
680 | ||
681 | /* Connect the user directly to STDBUG. This command acts just like the | |
682 | 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */ | |
683 | ||
1724c671 | 684 | /*static struct ttystate ttystate;*/ |
a0f9783e SG |
685 | |
686 | static void | |
687 | cleanup_tty() | |
688 | { | |
689 | printf("\r\n[Exiting connect mode]\r\n"); | |
1724c671 | 690 | /* SERIAL_RESTORE(0, &ttystate);*/ |
a0f9783e SG |
691 | } |
692 | ||
1724c671 SG |
693 | #if 0 |
694 | /* This all should now be in serial.c */ | |
695 | ||
a0f9783e SG |
696 | static void |
697 | connect_command (args, fromtty) | |
698 | char *args; | |
699 | int fromtty; | |
700 | { | |
701 | fd_set readfds; | |
702 | int numfds; | |
703 | int c; | |
704 | char cur_esc = 0; | |
705 | ||
706 | dont_repeat(); | |
707 | ||
708 | if (st2000_desc < 0) | |
709 | error("st2000 target not open."); | |
710 | ||
711 | if (args) | |
712 | fprintf("This command takes no args. They have been ignored.\n"); | |
713 | ||
714 | printf("[Entering connect mode. Use ~. or ~^D to escape]\n"); | |
715 | ||
716 | serial_raw(0, &ttystate); | |
717 | ||
718 | make_cleanup(cleanup_tty, 0); | |
719 | ||
720 | FD_ZERO(&readfds); | |
721 | ||
722 | while (1) | |
723 | { | |
724 | do | |
725 | { | |
726 | FD_SET(0, &readfds); | |
727 | FD_SET(st2000_desc, &readfds); | |
728 | numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0); | |
729 | } | |
730 | while (numfds == 0); | |
731 | ||
732 | if (numfds < 0) | |
733 | perror_with_name("select"); | |
734 | ||
735 | if (FD_ISSET(0, &readfds)) | |
736 | { /* tty input, send to stdebug */ | |
737 | c = getchar(); | |
738 | if (c < 0) | |
739 | perror_with_name("connect"); | |
740 | ||
741 | printf_stdebug("%c", c); | |
742 | switch (cur_esc) | |
743 | { | |
744 | case 0: | |
745 | if (c == '\r') | |
746 | cur_esc = c; | |
747 | break; | |
748 | case '\r': | |
749 | if (c == '~') | |
750 | cur_esc = c; | |
751 | else | |
752 | cur_esc = 0; | |
753 | break; | |
754 | case '~': | |
755 | if (c == '.' || c == '\004') | |
756 | return; | |
757 | else | |
758 | cur_esc = 0; | |
759 | } | |
760 | } | |
761 | ||
762 | if (FD_ISSET(st2000_desc, &readfds)) | |
763 | { | |
764 | while (1) | |
765 | { | |
766 | c = readchar(0); | |
767 | if (c < 0) | |
768 | break; | |
769 | putchar(c); | |
770 | } | |
771 | fflush(stdout); | |
772 | } | |
773 | } | |
774 | } | |
1724c671 | 775 | #endif /* 0 */ |
a0f9783e | 776 | |
88cc9a36 SG |
777 | /* Define the target subroutine names */ |
778 | ||
a0f9783e SG |
779 | struct target_ops st2000_ops = { |
780 | "st2000", | |
781 | "Remote serial Tandem ST2000 target", | |
782 | "Use a remote computer running STDEBUG connected by a serial line,\n\ | |
55488e9e | 783 | or a network connection.\n\ |
88cc9a36 | 784 | Arguments are the name of the device for the serial line,\n\ |
55488e9e | 785 | the speed to connect at in bits per second.", |
a0f9783e SG |
786 | st2000_open, |
787 | st2000_close, | |
788 | 0, | |
789 | st2000_detach, | |
790 | st2000_resume, | |
791 | st2000_wait, | |
792 | st2000_fetch_register, | |
793 | st2000_store_register, | |
794 | st2000_prepare_to_store, | |
a0f9783e SG |
795 | st2000_xfer_inferior_memory, |
796 | st2000_files_info, | |
797 | st2000_insert_breakpoint, | |
798 | st2000_remove_breakpoint, /* Breakpoints */ | |
799 | 0, | |
800 | 0, | |
801 | 0, | |
802 | 0, | |
803 | 0, /* Terminal handling */ | |
804 | st2000_kill, | |
805 | 0, /* load */ | |
806 | 0, /* lookup_symbol */ | |
807 | st2000_create_inferior, | |
808 | st2000_mourn_inferior, | |
5ee4e16c | 809 | 0, /* can_run */ |
3950a34e | 810 | 0, /* notice_signals */ |
a0f9783e SG |
811 | process_stratum, |
812 | 0, /* next */ | |
813 | 1, | |
814 | 1, | |
815 | 1, | |
816 | 1, | |
817 | 1, /* all mem, mem, stack, regs, exec */ | |
818 | 0, | |
819 | 0, /* Section pointers */ | |
820 | OPS_MAGIC, /* Always the last thing */ | |
88cc9a36 SG |
821 | }; |
822 | ||
823 | void | |
55488e9e | 824 | _initialize_remote_st2000 () |
88cc9a36 | 825 | { |
55488e9e | 826 | add_target (&st2000_ops); |
a0f9783e SG |
827 | add_com ("st2000 <command>", class_obscure, st2000_command, |
828 | "Send a command to the STDBUG monitor."); | |
829 | add_com ("connect", class_obscure, connect_command, | |
830 | "Connect the terminal directly up to the STDBUG command monitor.\n\ | |
831 | Use <CR>~. or <CR>~^D to break out."); | |
88cc9a36 | 832 | } |