| 1 | /* Remote debugging interface for AMD 29000 EBMON on IBM PC, 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., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | /* This is like remote.c but is for an esoteric situation-- |
| 23 | having a a29k board in a PC hooked up to a unix machine with |
| 24 | a serial line, and running ctty com1 on the PC, through which |
| 25 | the unix machine can run ebmon. Not to mention that the PC |
| 26 | has PC/NFS, so it can access the same executables that gdb can, |
| 27 | over the net in real time. */ |
| 28 | |
| 29 | #include "defs.h" |
| 30 | #include "gdb_string.h" |
| 31 | |
| 32 | #include "inferior.h" |
| 33 | #include "bfd.h" |
| 34 | #include "symfile.h" |
| 35 | #include "gdb_wait.h" |
| 36 | #include "value.h" |
| 37 | #include <ctype.h> |
| 38 | #include <fcntl.h> |
| 39 | #include <signal.h> |
| 40 | #include <errno.h> |
| 41 | #include "terminal.h" |
| 42 | #include "target.h" |
| 43 | #include "gdbcore.h" |
| 44 | |
| 45 | extern struct target_ops eb_ops; /* Forward declaration */ |
| 46 | |
| 47 | static void eb_close (); |
| 48 | |
| 49 | #define LOG_FILE "eb.log" |
| 50 | #if defined (LOG_FILE) |
| 51 | FILE *log_file; |
| 52 | #endif |
| 53 | |
| 54 | static int timeout = 24; |
| 55 | |
| 56 | /* Descriptor for I/O to remote machine. Initialize it to -1 so that |
| 57 | eb_open knows that we don't have a file open when the program |
| 58 | starts. */ |
| 59 | int eb_desc = -1; |
| 60 | |
| 61 | /* stream which is fdopen'd from eb_desc. Only valid when |
| 62 | eb_desc != -1. */ |
| 63 | FILE *eb_stream; |
| 64 | |
| 65 | /* Read a character from the remote system, doing all the fancy |
| 66 | timeout stuff. */ |
| 67 | static int |
| 68 | readchar (void) |
| 69 | { |
| 70 | char buf; |
| 71 | |
| 72 | buf = '\0'; |
| 73 | #ifdef HAVE_TERMIO |
| 74 | /* termio does the timeout for us. */ |
| 75 | read (eb_desc, &buf, 1); |
| 76 | #else |
| 77 | alarm (timeout); |
| 78 | if (read (eb_desc, &buf, 1) < 0) |
| 79 | { |
| 80 | if (errno == EINTR) |
| 81 | error ("Timeout reading from remote system."); |
| 82 | else |
| 83 | perror_with_name ("remote"); |
| 84 | } |
| 85 | alarm (0); |
| 86 | #endif |
| 87 | |
| 88 | if (buf == '\0') |
| 89 | error ("Timeout reading from remote system."); |
| 90 | #if defined (LOG_FILE) |
| 91 | putc (buf & 0x7f, log_file); |
| 92 | #endif |
| 93 | return buf & 0x7f; |
| 94 | } |
| 95 | |
| 96 | /* Keep discarding input from the remote system, until STRING is found. |
| 97 | Let the user break out immediately. */ |
| 98 | static void |
| 99 | expect (char *string) |
| 100 | { |
| 101 | char *p = string; |
| 102 | |
| 103 | immediate_quit++; |
| 104 | while (1) |
| 105 | { |
| 106 | if (readchar () == *p) |
| 107 | { |
| 108 | p++; |
| 109 | if (*p == '\0') |
| 110 | { |
| 111 | immediate_quit--; |
| 112 | return; |
| 113 | } |
| 114 | } |
| 115 | else |
| 116 | p = string; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /* Keep discarding input until we see the ebmon prompt. |
| 121 | |
| 122 | The convention for dealing with the prompt is that you |
| 123 | o give your command |
| 124 | o *then* wait for the prompt. |
| 125 | |
| 126 | Thus the last thing that a procedure does with the serial line |
| 127 | will be an expect_prompt(). Exception: eb_resume does not |
| 128 | wait for the prompt, because the terminal is being handed over |
| 129 | to the inferior. However, the next thing which happens after that |
| 130 | is a eb_wait which does wait for the prompt. |
| 131 | Note that this includes abnormal exit, e.g. error(). This is |
| 132 | necessary to prevent getting into states from which we can't |
| 133 | recover. */ |
| 134 | static void |
| 135 | expect_prompt (void) |
| 136 | { |
| 137 | #if defined (LOG_FILE) |
| 138 | /* This is a convenient place to do this. The idea is to do it often |
| 139 | enough that we never lose much data if we terminate abnormally. */ |
| 140 | fflush (log_file); |
| 141 | #endif |
| 142 | expect ("\n# "); |
| 143 | } |
| 144 | |
| 145 | /* Get a hex digit from the remote system & return its value. |
| 146 | If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ |
| 147 | static int |
| 148 | get_hex_digit (int ignore_space) |
| 149 | { |
| 150 | int ch; |
| 151 | while (1) |
| 152 | { |
| 153 | ch = readchar (); |
| 154 | if (ch >= '0' && ch <= '9') |
| 155 | return ch - '0'; |
| 156 | else if (ch >= 'A' && ch <= 'F') |
| 157 | return ch - 'A' + 10; |
| 158 | else if (ch >= 'a' && ch <= 'f') |
| 159 | return ch - 'a' + 10; |
| 160 | else if (ch == ' ' && ignore_space) |
| 161 | ; |
| 162 | else |
| 163 | { |
| 164 | expect_prompt (); |
| 165 | error ("Invalid hex digit from remote system."); |
| 166 | } |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /* Get a byte from eb_desc and put it in *BYT. Accept any number |
| 171 | leading spaces. */ |
| 172 | static void |
| 173 | get_hex_byte (char *byt) |
| 174 | { |
| 175 | int val; |
| 176 | |
| 177 | val = get_hex_digit (1) << 4; |
| 178 | val |= get_hex_digit (0); |
| 179 | *byt = val; |
| 180 | } |
| 181 | |
| 182 | /* Get N 32-bit words from remote, each preceded by a space, |
| 183 | and put them in registers starting at REGNO. */ |
| 184 | static void |
| 185 | get_hex_regs (int n, int regno) |
| 186 | { |
| 187 | long val; |
| 188 | int i; |
| 189 | |
| 190 | for (i = 0; i < n; i++) |
| 191 | { |
| 192 | int j; |
| 193 | |
| 194 | val = 0; |
| 195 | for (j = 0; j < 8; j++) |
| 196 | val = (val << 4) + get_hex_digit (j == 0); |
| 197 | supply_register (regno++, (char *) &val); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | /* Called when SIGALRM signal sent due to alarm() timeout. */ |
| 202 | #ifndef HAVE_TERMIO |
| 203 | |
| 204 | #ifndef __STDC__ |
| 205 | #define volatile |
| 206 | /**/ |
| 207 | #endif |
| 208 | volatile int n_alarms; |
| 209 | |
| 210 | void |
| 211 | eb_timer (void) |
| 212 | { |
| 213 | #if 0 |
| 214 | if (kiodebug) |
| 215 | printf ("eb_timer called\n"); |
| 216 | #endif |
| 217 | n_alarms++; |
| 218 | } |
| 219 | #endif |
| 220 | |
| 221 | /* malloc'd name of the program on the remote system. */ |
| 222 | static char *prog_name = NULL; |
| 223 | |
| 224 | /* Nonzero if we have loaded the file ("yc") and not yet issued a "gi" |
| 225 | command. "gi" is supposed to happen exactly once for each "yc". */ |
| 226 | static int need_gi = 0; |
| 227 | |
| 228 | /* Number of SIGTRAPs we need to simulate. That is, the next |
| 229 | NEED_ARTIFICIAL_TRAP calls to eb_wait should just return |
| 230 | SIGTRAP without actually waiting for anything. */ |
| 231 | |
| 232 | static int need_artificial_trap = 0; |
| 233 | |
| 234 | /* This is called not only when we first attach, but also when the |
| 235 | user types "run" after having attached. */ |
| 236 | static void |
| 237 | eb_create_inferior (char *execfile, char *args, char **env) |
| 238 | { |
| 239 | int entry_pt; |
| 240 | |
| 241 | if (args && *args) |
| 242 | error ("Can't pass arguments to remote EBMON process"); |
| 243 | |
| 244 | if (execfile == 0 || exec_bfd == 0) |
| 245 | error ("No executable file specified"); |
| 246 | |
| 247 | entry_pt = (int) bfd_get_start_address (exec_bfd); |
| 248 | |
| 249 | { |
| 250 | /* OK, now read in the file. Y=read, C=COFF, D=no symbols |
| 251 | 0=start address, %s=filename. */ |
| 252 | |
| 253 | fprintf (eb_stream, "YC D,0:%s", prog_name); |
| 254 | |
| 255 | if (args != NULL) |
| 256 | fprintf (eb_stream, " %s", args); |
| 257 | |
| 258 | fprintf (eb_stream, "\n"); |
| 259 | fflush (eb_stream); |
| 260 | |
| 261 | expect_prompt (); |
| 262 | |
| 263 | need_gi = 1; |
| 264 | } |
| 265 | |
| 266 | /* The "process" (board) is already stopped awaiting our commands, and |
| 267 | the program is already downloaded. We just set its PC and go. */ |
| 268 | |
| 269 | clear_proceed_status (); |
| 270 | |
| 271 | /* Tell wait_for_inferior that we've started a new process. */ |
| 272 | init_wait_for_inferior (); |
| 273 | |
| 274 | /* Set up the "saved terminal modes" of the inferior |
| 275 | based on what modes we are starting it with. */ |
| 276 | target_terminal_init (); |
| 277 | |
| 278 | /* Install inferior's terminal modes. */ |
| 279 | target_terminal_inferior (); |
| 280 | |
| 281 | /* insert_step_breakpoint (); FIXME, do we need this? */ |
| 282 | proceed ((CORE_ADDR) entry_pt, TARGET_SIGNAL_DEFAULT, 0); /* Let 'er rip... */ |
| 283 | } |
| 284 | |
| 285 | /* Translate baud rates from integers to damn B_codes. Unix should |
| 286 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ |
| 287 | |
| 288 | #ifndef B19200 |
| 289 | #define B19200 EXTA |
| 290 | #endif |
| 291 | #ifndef B38400 |
| 292 | #define B38400 EXTB |
| 293 | #endif |
| 294 | |
| 295 | struct |
| 296 | { |
| 297 | int rate, damn_b; |
| 298 | } |
| 299 | baudtab[] = |
| 300 | { |
| 301 | { |
| 302 | 0, B0 |
| 303 | } |
| 304 | , |
| 305 | { |
| 306 | 50, B50 |
| 307 | } |
| 308 | , |
| 309 | { |
| 310 | 75, B75 |
| 311 | } |
| 312 | , |
| 313 | { |
| 314 | 110, B110 |
| 315 | } |
| 316 | , |
| 317 | { |
| 318 | 134, B134 |
| 319 | } |
| 320 | , |
| 321 | { |
| 322 | 150, B150 |
| 323 | } |
| 324 | , |
| 325 | { |
| 326 | 200, B200 |
| 327 | } |
| 328 | , |
| 329 | { |
| 330 | 300, B300 |
| 331 | } |
| 332 | , |
| 333 | { |
| 334 | 600, B600 |
| 335 | } |
| 336 | , |
| 337 | { |
| 338 | 1200, B1200 |
| 339 | } |
| 340 | , |
| 341 | { |
| 342 | 1800, B1800 |
| 343 | } |
| 344 | , |
| 345 | { |
| 346 | 2400, B2400 |
| 347 | } |
| 348 | , |
| 349 | { |
| 350 | 4800, B4800 |
| 351 | } |
| 352 | , |
| 353 | { |
| 354 | 9600, B9600 |
| 355 | } |
| 356 | , |
| 357 | { |
| 358 | 19200, B19200 |
| 359 | } |
| 360 | , |
| 361 | { |
| 362 | 38400, B38400 |
| 363 | } |
| 364 | , |
| 365 | { |
| 366 | -1, -1 |
| 367 | } |
| 368 | , |
| 369 | }; |
| 370 | |
| 371 | int |
| 372 | damn_b (int rate) |
| 373 | { |
| 374 | int i; |
| 375 | |
| 376 | for (i = 0; baudtab[i].rate != -1; i++) |
| 377 | if (rate == baudtab[i].rate) |
| 378 | return baudtab[i].damn_b; |
| 379 | return B38400; /* Random */ |
| 380 | } |
| 381 | |
| 382 | |
| 383 | /* Open a connection to a remote debugger. |
| 384 | NAME is the filename used for communication, then a space, |
| 385 | then the name of the program as we should name it to EBMON. */ |
| 386 | |
| 387 | static int baudrate = 9600; |
| 388 | static char *dev_name; |
| 389 | void |
| 390 | eb_open (char *name, int from_tty) |
| 391 | { |
| 392 | TERMINAL sg; |
| 393 | |
| 394 | char *p; |
| 395 | |
| 396 | target_preopen (from_tty); |
| 397 | |
| 398 | /* Find the first whitespace character, it separates dev_name from |
| 399 | prog_name. */ |
| 400 | if (name == 0) |
| 401 | goto erroid; |
| 402 | |
| 403 | for (p = name; |
| 404 | *p != '\0' && !isspace (*p); p++) |
| 405 | ; |
| 406 | if (*p == '\0') |
| 407 | erroid: |
| 408 | error ("\ |
| 409 | Please include the name of the device for the serial port,\n\ |
| 410 | the baud rate, and the name of the program to run on the remote system."); |
| 411 | dev_name = alloca (p - name + 1); |
| 412 | strncpy (dev_name, name, p - name); |
| 413 | dev_name[p - name] = '\0'; |
| 414 | |
| 415 | /* Skip over the whitespace after dev_name */ |
| 416 | for (; isspace (*p); p++) |
| 417 | /*EMPTY */ ; |
| 418 | |
| 419 | if (1 != sscanf (p, "%d ", &baudrate)) |
| 420 | goto erroid; |
| 421 | |
| 422 | /* Skip the number and then the spaces */ |
| 423 | for (; isdigit (*p); p++) |
| 424 | /*EMPTY */ ; |
| 425 | for (; isspace (*p); p++) |
| 426 | /*EMPTY */ ; |
| 427 | |
| 428 | if (prog_name != NULL) |
| 429 | free (prog_name); |
| 430 | prog_name = savestring (p, strlen (p)); |
| 431 | |
| 432 | eb_close (0); |
| 433 | |
| 434 | eb_desc = open (dev_name, O_RDWR); |
| 435 | if (eb_desc < 0) |
| 436 | perror_with_name (dev_name); |
| 437 | ioctl (eb_desc, TIOCGETP, &sg); |
| 438 | #ifdef HAVE_TERMIO |
| 439 | sg.c_cc[VMIN] = 0; /* read with timeout. */ |
| 440 | sg.c_cc[VTIME] = timeout * 10; |
| 441 | sg.c_lflag &= ~(ICANON | ECHO); |
| 442 | sg.c_cflag = (sg.c_cflag & ~CBAUD) | damn_b (baudrate); |
| 443 | #else |
| 444 | sg.sg_ispeed = damn_b (baudrate); |
| 445 | sg.sg_ospeed = damn_b (baudrate); |
| 446 | sg.sg_flags |= RAW | ANYP; |
| 447 | sg.sg_flags &= ~ECHO; |
| 448 | #endif |
| 449 | |
| 450 | ioctl (eb_desc, TIOCSETP, &sg); |
| 451 | eb_stream = fdopen (eb_desc, "r+"); |
| 452 | |
| 453 | push_target (&eb_ops); |
| 454 | if (from_tty) |
| 455 | printf ("Remote %s debugging %s using %s\n", target_shortname, |
| 456 | prog_name, dev_name); |
| 457 | |
| 458 | #ifndef HAVE_TERMIO |
| 459 | #ifndef NO_SIGINTERRUPT |
| 460 | /* Cause SIGALRM's to make reads fail with EINTR instead of resuming |
| 461 | the read. */ |
| 462 | if (siginterrupt (SIGALRM, 1) != 0) |
| 463 | perror ("eb_open: error in siginterrupt"); |
| 464 | #endif |
| 465 | |
| 466 | /* Set up read timeout timer. */ |
| 467 | if ((void (*)) signal (SIGALRM, eb_timer) == (void (*)) -1) |
| 468 | perror ("eb_open: error in signal"); |
| 469 | #endif |
| 470 | |
| 471 | #if defined (LOG_FILE) |
| 472 | log_file = fopen (LOG_FILE, "w"); |
| 473 | if (log_file == NULL) |
| 474 | perror_with_name (LOG_FILE); |
| 475 | #endif |
| 476 | |
| 477 | /* Hello? Are you there? */ |
| 478 | write (eb_desc, "\n", 1); |
| 479 | |
| 480 | expect_prompt (); |
| 481 | } |
| 482 | |
| 483 | /* Close out all files and local state before this target loses control. */ |
| 484 | |
| 485 | static void |
| 486 | eb_close (int quitting) |
| 487 | { |
| 488 | |
| 489 | /* Due to a bug in Unix, fclose closes not only the stdio stream, |
| 490 | but also the file descriptor. So we don't actually close |
| 491 | eb_desc. */ |
| 492 | if (eb_stream) |
| 493 | fclose (eb_stream); /* This also closes eb_desc */ |
| 494 | if (eb_desc >= 0) |
| 495 | /* close (eb_desc); */ |
| 496 | |
| 497 | /* Do not try to close eb_desc again, later in the program. */ |
| 498 | eb_stream = NULL; |
| 499 | eb_desc = -1; |
| 500 | |
| 501 | #if defined (LOG_FILE) |
| 502 | if (log_file) |
| 503 | { |
| 504 | if (ferror (log_file)) |
| 505 | printf ("Error writing log file.\n"); |
| 506 | if (fclose (log_file) != 0) |
| 507 | printf ("Error closing log file.\n"); |
| 508 | } |
| 509 | #endif |
| 510 | } |
| 511 | |
| 512 | /* Terminate the open connection to the remote debugger. |
| 513 | Use this when you want to detach and do something else |
| 514 | with your gdb. */ |
| 515 | void |
| 516 | eb_detach (int from_tty) |
| 517 | { |
| 518 | pop_target (); /* calls eb_close to do the real work */ |
| 519 | if (from_tty) |
| 520 | printf ("Ending remote %s debugging\n", target_shortname); |
| 521 | } |
| 522 | |
| 523 | /* Tell the remote machine to resume. */ |
| 524 | |
| 525 | void |
| 526 | eb_resume (int pid, int step, enum target_signal sig) |
| 527 | { |
| 528 | if (step) |
| 529 | { |
| 530 | write (eb_desc, "t 1,s\n", 6); |
| 531 | /* Wait for the echo. */ |
| 532 | expect ("t 1,s\r"); |
| 533 | /* Then comes a line containing the instruction we stepped to. */ |
| 534 | expect ("\n@"); |
| 535 | /* Then we get the prompt. */ |
| 536 | expect_prompt (); |
| 537 | |
| 538 | /* Force the next eb_wait to return a trap. Not doing anything |
| 539 | about I/O from the target means that the user has to type |
| 540 | "continue" to see any. This should be fixed. */ |
| 541 | need_artificial_trap = 1; |
| 542 | } |
| 543 | else |
| 544 | { |
| 545 | if (need_gi) |
| 546 | { |
| 547 | need_gi = 0; |
| 548 | write (eb_desc, "gi\n", 3); |
| 549 | |
| 550 | /* Swallow the echo of "gi". */ |
| 551 | expect ("gi\r"); |
| 552 | } |
| 553 | else |
| 554 | { |
| 555 | write (eb_desc, "GR\n", 3); |
| 556 | /* Swallow the echo. */ |
| 557 | expect ("GR\r"); |
| 558 | } |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | /* Wait until the remote machine stops, then return, |
| 563 | storing status in STATUS just as `wait' would. */ |
| 564 | |
| 565 | int |
| 566 | eb_wait (struct target_waitstatus *status) |
| 567 | { |
| 568 | /* Strings to look for. '?' means match any single character. |
| 569 | Note that with the algorithm we use, the initial character |
| 570 | of the string cannot recur in the string, or we will not |
| 571 | find some cases of the string in the input. */ |
| 572 | |
| 573 | static char bpt[] = "Invalid interrupt taken - #0x50 - "; |
| 574 | /* It would be tempting to look for "\n[__exit + 0x8]\n" |
| 575 | but that requires loading symbols with "yc i" and even if |
| 576 | we did do that we don't know that the file has symbols. */ |
| 577 | static char exitmsg[] = "\n@????????I JMPTI GR121,LR0"; |
| 578 | char *bp = bpt; |
| 579 | char *ep = exitmsg; |
| 580 | |
| 581 | /* Large enough for either sizeof (bpt) or sizeof (exitmsg) chars. */ |
| 582 | char swallowed[50]; |
| 583 | /* Current position in swallowed. */ |
| 584 | char *swallowed_p = swallowed; |
| 585 | |
| 586 | int ch; |
| 587 | int ch_handled; |
| 588 | |
| 589 | int old_timeout = timeout; |
| 590 | |
| 591 | status->kind = TARGET_WAITKIND_EXITED; |
| 592 | status->value.integer = 0; |
| 593 | |
| 594 | if (need_artificial_trap != 0) |
| 595 | { |
| 596 | status->kind = TARGET_WAITKIND_STOPPED; |
| 597 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 598 | need_artificial_trap--; |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | timeout = 0; /* Don't time out -- user program is running. */ |
| 603 | while (1) |
| 604 | { |
| 605 | ch_handled = 0; |
| 606 | ch = readchar (); |
| 607 | if (ch == *bp) |
| 608 | { |
| 609 | bp++; |
| 610 | if (*bp == '\0') |
| 611 | break; |
| 612 | ch_handled = 1; |
| 613 | |
| 614 | *swallowed_p++ = ch; |
| 615 | } |
| 616 | else |
| 617 | bp = bpt; |
| 618 | |
| 619 | if (ch == *ep || *ep == '?') |
| 620 | { |
| 621 | ep++; |
| 622 | if (*ep == '\0') |
| 623 | break; |
| 624 | |
| 625 | if (!ch_handled) |
| 626 | *swallowed_p++ = ch; |
| 627 | ch_handled = 1; |
| 628 | } |
| 629 | else |
| 630 | ep = exitmsg; |
| 631 | |
| 632 | if (!ch_handled) |
| 633 | { |
| 634 | char *p; |
| 635 | |
| 636 | /* Print out any characters which have been swallowed. */ |
| 637 | for (p = swallowed; p < swallowed_p; ++p) |
| 638 | putc (*p, stdout); |
| 639 | swallowed_p = swallowed; |
| 640 | |
| 641 | putc (ch, stdout); |
| 642 | } |
| 643 | } |
| 644 | expect_prompt (); |
| 645 | if (*bp == '\0') |
| 646 | { |
| 647 | status->kind = TARGET_WAITKIND_STOPPED; |
| 648 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 649 | } |
| 650 | else |
| 651 | { |
| 652 | status->kind = TARGET_WAITKIND_EXITED; |
| 653 | status->value.integer = 0; |
| 654 | } |
| 655 | timeout = old_timeout; |
| 656 | |
| 657 | return 0; |
| 658 | } |
| 659 | |
| 660 | /* Return the name of register number REGNO |
| 661 | in the form input and output by EBMON. |
| 662 | |
| 663 | Returns a pointer to a static buffer containing the answer. */ |
| 664 | static char * |
| 665 | get_reg_name (int regno) |
| 666 | { |
| 667 | static char buf[80]; |
| 668 | if (regno >= GR96_REGNUM && regno < GR96_REGNUM + 32) |
| 669 | sprintf (buf, "GR%03d", regno - GR96_REGNUM + 96); |
| 670 | else if (regno >= LR0_REGNUM && regno < LR0_REGNUM + 128) |
| 671 | sprintf (buf, "LR%03d", regno - LR0_REGNUM); |
| 672 | else if (regno == Q_REGNUM) |
| 673 | strcpy (buf, "SR131"); |
| 674 | else if (regno >= BP_REGNUM && regno <= CR_REGNUM) |
| 675 | sprintf (buf, "SR%03d", regno - BP_REGNUM + 133); |
| 676 | else if (regno == ALU_REGNUM) |
| 677 | strcpy (buf, "SR132"); |
| 678 | else if (regno >= IPC_REGNUM && regno <= IPB_REGNUM) |
| 679 | sprintf (buf, "SR%03d", regno - IPC_REGNUM + 128); |
| 680 | else if (regno >= VAB_REGNUM && regno <= LRU_REGNUM) |
| 681 | sprintf (buf, "SR%03d", regno - VAB_REGNUM); |
| 682 | else if (regno == GR1_REGNUM) |
| 683 | strcpy (buf, "GR001"); |
| 684 | return buf; |
| 685 | } |
| 686 | |
| 687 | /* Read the remote registers into the block REGS. */ |
| 688 | |
| 689 | static void |
| 690 | eb_fetch_registers (void) |
| 691 | { |
| 692 | int reg_index; |
| 693 | int regnum_index; |
| 694 | char tempbuf[10]; |
| 695 | int i; |
| 696 | |
| 697 | #if 0 |
| 698 | /* This should not be necessary, because one is supposed to read the |
| 699 | registers only when the inferior is stopped (at least with |
| 700 | ptrace() and why not make it the same for remote?). */ |
| 701 | /* ^A is the "normal character" used to make sure we are talking to EBMON |
| 702 | and not to the program being debugged. */ |
| 703 | write (eb_desc, "\001\n"); |
| 704 | expect_prompt (); |
| 705 | #endif |
| 706 | |
| 707 | write (eb_desc, "dw gr96,gr127\n", 14); |
| 708 | for (reg_index = 96, regnum_index = GR96_REGNUM; |
| 709 | reg_index < 128; |
| 710 | reg_index += 4, regnum_index += 4) |
| 711 | { |
| 712 | sprintf (tempbuf, "GR%03d ", reg_index); |
| 713 | expect (tempbuf); |
| 714 | get_hex_regs (4, regnum_index); |
| 715 | expect ("\n"); |
| 716 | } |
| 717 | |
| 718 | for (i = 0; i < 128; i += 32) |
| 719 | { |
| 720 | /* The PC has a tendency to hang if we get these |
| 721 | all in one fell swoop ("dw lr0,lr127"). */ |
| 722 | sprintf (tempbuf, "dw lr%d\n", i); |
| 723 | write (eb_desc, tempbuf, strlen (tempbuf)); |
| 724 | for (reg_index = i, regnum_index = LR0_REGNUM + i; |
| 725 | reg_index < i + 32; |
| 726 | reg_index += 4, regnum_index += 4) |
| 727 | { |
| 728 | sprintf (tempbuf, "LR%03d ", reg_index); |
| 729 | expect (tempbuf); |
| 730 | get_hex_regs (4, regnum_index); |
| 731 | expect ("\n"); |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | write (eb_desc, "dw sr133,sr133\n", 15); |
| 736 | expect ("SR133 "); |
| 737 | get_hex_regs (1, BP_REGNUM); |
| 738 | expect ("\n"); |
| 739 | |
| 740 | write (eb_desc, "dw sr134,sr134\n", 15); |
| 741 | expect ("SR134 "); |
| 742 | get_hex_regs (1, FC_REGNUM); |
| 743 | expect ("\n"); |
| 744 | |
| 745 | write (eb_desc, "dw sr135,sr135\n", 15); |
| 746 | expect ("SR135 "); |
| 747 | get_hex_regs (1, CR_REGNUM); |
| 748 | expect ("\n"); |
| 749 | |
| 750 | write (eb_desc, "dw sr131,sr131\n", 15); |
| 751 | expect ("SR131 "); |
| 752 | get_hex_regs (1, Q_REGNUM); |
| 753 | expect ("\n"); |
| 754 | |
| 755 | write (eb_desc, "dw sr0,sr14\n", 12); |
| 756 | for (reg_index = 0, regnum_index = VAB_REGNUM; |
| 757 | regnum_index <= LRU_REGNUM; |
| 758 | regnum_index += 4, reg_index += 4) |
| 759 | { |
| 760 | sprintf (tempbuf, "SR%03d ", reg_index); |
| 761 | expect (tempbuf); |
| 762 | get_hex_regs (reg_index == 12 ? 3 : 4, regnum_index); |
| 763 | expect ("\n"); |
| 764 | } |
| 765 | |
| 766 | /* There doesn't seem to be any way to get these. */ |
| 767 | { |
| 768 | int val = -1; |
| 769 | supply_register (FPE_REGNUM, (char *) &val); |
| 770 | supply_register (INTE_REGNUM, (char *) &val); |
| 771 | supply_register (FPS_REGNUM, (char *) &val); |
| 772 | supply_register (EXO_REGNUM, (char *) &val); |
| 773 | } |
| 774 | |
| 775 | write (eb_desc, "dw gr1,gr1\n", 11); |
| 776 | expect ("GR001 "); |
| 777 | get_hex_regs (1, GR1_REGNUM); |
| 778 | expect_prompt (); |
| 779 | } |
| 780 | |
| 781 | /* Fetch register REGNO, or all registers if REGNO is -1. |
| 782 | Returns errno value. */ |
| 783 | void |
| 784 | eb_fetch_register (int regno) |
| 785 | { |
| 786 | if (regno == -1) |
| 787 | eb_fetch_registers (); |
| 788 | else |
| 789 | { |
| 790 | char *name = get_reg_name (regno); |
| 791 | fprintf (eb_stream, "dw %s,%s\n", name, name); |
| 792 | expect (name); |
| 793 | expect (" "); |
| 794 | get_hex_regs (1, regno); |
| 795 | expect_prompt (); |
| 796 | } |
| 797 | return; |
| 798 | } |
| 799 | |
| 800 | /* Store the remote registers from the contents of the block REGS. */ |
| 801 | |
| 802 | static void |
| 803 | eb_store_registers (void) |
| 804 | { |
| 805 | int i, j; |
| 806 | fprintf (eb_stream, "s gr1,%x\n", read_register (GR1_REGNUM)); |
| 807 | expect_prompt (); |
| 808 | |
| 809 | for (j = 0; j < 32; j += 16) |
| 810 | { |
| 811 | fprintf (eb_stream, "s gr%d,", j + 96); |
| 812 | for (i = 0; i < 15; ++i) |
| 813 | fprintf (eb_stream, "%x,", read_register (GR96_REGNUM + j + i)); |
| 814 | fprintf (eb_stream, "%x\n", read_register (GR96_REGNUM + j + 15)); |
| 815 | expect_prompt (); |
| 816 | } |
| 817 | |
| 818 | for (j = 0; j < 128; j += 16) |
| 819 | { |
| 820 | fprintf (eb_stream, "s lr%d,", j); |
| 821 | for (i = 0; i < 15; ++i) |
| 822 | fprintf (eb_stream, "%x,", read_register (LR0_REGNUM + j + i)); |
| 823 | fprintf (eb_stream, "%x\n", read_register (LR0_REGNUM + j + 15)); |
| 824 | expect_prompt (); |
| 825 | } |
| 826 | |
| 827 | fprintf (eb_stream, "s sr133,%x,%x,%x\n", read_register (BP_REGNUM), |
| 828 | read_register (FC_REGNUM), read_register (CR_REGNUM)); |
| 829 | expect_prompt (); |
| 830 | fprintf (eb_stream, "s sr131,%x\n", read_register (Q_REGNUM)); |
| 831 | expect_prompt (); |
| 832 | fprintf (eb_stream, "s sr0,"); |
| 833 | for (i = 0; i < 11; ++i) |
| 834 | fprintf (eb_stream, "%x,", read_register (VAB_REGNUM + i)); |
| 835 | fprintf (eb_stream, "%x\n", read_register (VAB_REGNUM + 11)); |
| 836 | expect_prompt (); |
| 837 | } |
| 838 | |
| 839 | /* Store register REGNO, or all if REGNO == 0. |
| 840 | Return errno value. */ |
| 841 | void |
| 842 | eb_store_register (int regno) |
| 843 | { |
| 844 | if (regno == -1) |
| 845 | eb_store_registers (); |
| 846 | else |
| 847 | { |
| 848 | char *name = get_reg_name (regno); |
| 849 | fprintf (eb_stream, "s %s,%x\n", name, read_register (regno)); |
| 850 | /* Setting GR1 changes the numbers of all the locals, so |
| 851 | invalidate the register cache. Do this *after* calling |
| 852 | read_register, because we want read_register to return the |
| 853 | value that write_register has just stuffed into the registers |
| 854 | array, not the value of the register fetched from the |
| 855 | inferior. */ |
| 856 | if (regno == GR1_REGNUM) |
| 857 | registers_changed (); |
| 858 | expect_prompt (); |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | /* Get ready to modify the registers array. On machines which store |
| 863 | individual registers, this doesn't need to do anything. On machines |
| 864 | which store all the registers in one fell swoop, this makes sure |
| 865 | that registers contains all the registers from the program being |
| 866 | debugged. */ |
| 867 | |
| 868 | void |
| 869 | eb_prepare_to_store (void) |
| 870 | { |
| 871 | /* Do nothing, since we can store individual regs */ |
| 872 | } |
| 873 | |
| 874 | /* Transfer LEN bytes between GDB address MYADDR and target address |
| 875 | MEMADDR. If WRITE is non-zero, transfer them to the target, |
| 876 | otherwise transfer them from the target. TARGET is unused. |
| 877 | |
| 878 | Returns the number of bytes transferred. */ |
| 879 | |
| 880 | int |
| 881 | eb_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
| 882 | struct target_ops *target) |
| 883 | { |
| 884 | if (write) |
| 885 | return eb_write_inferior_memory (memaddr, myaddr, len); |
| 886 | else |
| 887 | return eb_read_inferior_memory (memaddr, myaddr, len); |
| 888 | } |
| 889 | |
| 890 | void |
| 891 | eb_files_info (void) |
| 892 | { |
| 893 | printf ("\tAttached to %s at %d baud and running program %s.\n", |
| 894 | dev_name, baudrate, prog_name); |
| 895 | } |
| 896 | |
| 897 | /* Copy LEN bytes of data from debugger memory at MYADDR |
| 898 | to inferior's memory at MEMADDR. Returns length moved. */ |
| 899 | int |
| 900 | eb_write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
| 901 | { |
| 902 | int i; |
| 903 | |
| 904 | for (i = 0; i < len; i++) |
| 905 | { |
| 906 | if ((i % 16) == 0) |
| 907 | fprintf (eb_stream, "sb %x,", memaddr + i); |
| 908 | if ((i % 16) == 15 || i == len - 1) |
| 909 | { |
| 910 | fprintf (eb_stream, "%x\n", ((unsigned char *) myaddr)[i]); |
| 911 | expect_prompt (); |
| 912 | } |
| 913 | else |
| 914 | fprintf (eb_stream, "%x,", ((unsigned char *) myaddr)[i]); |
| 915 | } |
| 916 | return len; |
| 917 | } |
| 918 | |
| 919 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result |
| 920 | at debugger address MYADDR. Returns length moved. */ |
| 921 | int |
| 922 | eb_read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len) |
| 923 | { |
| 924 | int i; |
| 925 | |
| 926 | /* Number of bytes read so far. */ |
| 927 | int count; |
| 928 | |
| 929 | /* Starting address of this pass. */ |
| 930 | unsigned long startaddr; |
| 931 | |
| 932 | /* Number of bytes to read in this pass. */ |
| 933 | int len_this_pass; |
| 934 | |
| 935 | /* Note that this code works correctly if startaddr is just less |
| 936 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a |
| 937 | thing). That is, something like |
| 938 | eb_read_bytes (CORE_ADDR_MAX - 4, foo, 4) |
| 939 | works--it never adds len to memaddr and gets 0. */ |
| 940 | /* However, something like |
| 941 | eb_read_bytes (CORE_ADDR_MAX - 3, foo, 4) |
| 942 | doesn't need to work. Detect it and give up if there's an attempt |
| 943 | to do that. */ |
| 944 | if (((memaddr - 1) + len) < memaddr) |
| 945 | { |
| 946 | errno = EIO; |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | startaddr = memaddr; |
| 951 | count = 0; |
| 952 | while (count < len) |
| 953 | { |
| 954 | len_this_pass = 16; |
| 955 | if ((startaddr % 16) != 0) |
| 956 | len_this_pass -= startaddr % 16; |
| 957 | if (len_this_pass > (len - count)) |
| 958 | len_this_pass = (len - count); |
| 959 | |
| 960 | fprintf (eb_stream, "db %x,%x\n", startaddr, |
| 961 | (startaddr - 1) + len_this_pass); |
| 962 | expect ("\n"); |
| 963 | |
| 964 | /* Look for 8 hex digits. */ |
| 965 | i = 0; |
| 966 | while (1) |
| 967 | { |
| 968 | if (isxdigit (readchar ())) |
| 969 | ++i; |
| 970 | else |
| 971 | { |
| 972 | expect_prompt (); |
| 973 | error ("Hex digit expected from remote system."); |
| 974 | } |
| 975 | if (i >= 8) |
| 976 | break; |
| 977 | } |
| 978 | |
| 979 | expect (" "); |
| 980 | |
| 981 | for (i = 0; i < len_this_pass; i++) |
| 982 | get_hex_byte (&myaddr[count++]); |
| 983 | |
| 984 | expect_prompt (); |
| 985 | |
| 986 | startaddr += len_this_pass; |
| 987 | } |
| 988 | return len; |
| 989 | } |
| 990 | |
| 991 | static void |
| 992 | eb_kill (char *args, int from_tty) |
| 993 | { |
| 994 | return; /* Ignore attempts to kill target system */ |
| 995 | } |
| 996 | |
| 997 | /* Clean up when a program exits. |
| 998 | |
| 999 | The program actually lives on in the remote processor's RAM, and may be |
| 1000 | run again without a download. Don't leave it full of breakpoint |
| 1001 | instructions. */ |
| 1002 | |
| 1003 | void |
| 1004 | eb_mourn_inferior (void) |
| 1005 | { |
| 1006 | remove_breakpoints (); |
| 1007 | unpush_target (&eb_ops); |
| 1008 | generic_mourn_inferior (); /* Do all the proper things now */ |
| 1009 | } |
| 1010 | /* Define the target subroutine names */ |
| 1011 | |
| 1012 | struct target_ops eb_ops; |
| 1013 | |
| 1014 | static void |
| 1015 | init_eb_ops (void) |
| 1016 | { |
| 1017 | eb_ops.to_shortname = "amd-eb"; |
| 1018 | eb_ops.to_longname = "Remote serial AMD EBMON target"; |
| 1019 | eb_ops.to_doc = "Use a remote computer running EBMON connected by a serial line.\n\ |
| 1020 | Arguments are the name of the device for the serial line,\n\ |
| 1021 | the speed to connect at in bits per second, and the filename of the\n\ |
| 1022 | executable as it exists on the remote computer. For example,\n\ |
| 1023 | target amd-eb /dev/ttya 9600 demo", |
| 1024 | eb_ops.to_open = eb_open; |
| 1025 | eb_ops.to_close = eb_close; |
| 1026 | eb_ops.to_attach = 0; |
| 1027 | eb_ops.to_post_attach = NULL; |
| 1028 | eb_ops.to_require_attach = NULL; |
| 1029 | eb_ops.to_detach = eb_detach; |
| 1030 | eb_ops.to_require_detach = NULL; |
| 1031 | eb_ops.to_resume = eb_resume; |
| 1032 | eb_ops.to_wait = eb_wait; |
| 1033 | eb_ops.to_post_wait = NULL; |
| 1034 | eb_ops.to_fetch_registers = eb_fetch_register; |
| 1035 | eb_ops.to_store_registers = eb_store_register; |
| 1036 | eb_ops.to_prepare_to_store = eb_prepare_to_store; |
| 1037 | eb_ops.to_xfer_memory = eb_xfer_inferior_memory; |
| 1038 | eb_ops.to_files_info = eb_files_info; |
| 1039 | eb_ops.to_insert_breakpoint = 0; |
| 1040 | eb_ops.to_remove_breakpoint = 0; /* Breakpoints */ |
| 1041 | eb_ops.to_terminal_init = 0; |
| 1042 | eb_ops.to_terminal_inferior = 0; |
| 1043 | eb_ops.to_terminal_ours_for_output = 0; |
| 1044 | eb_ops.to_terminal_ours = 0; |
| 1045 | eb_ops.to_terminal_info = 0; /* Terminal handling */ |
| 1046 | eb_ops.to_kill = eb_kill; |
| 1047 | eb_ops.to_load = generic_load; /* load */ |
| 1048 | eb_ops.to_lookup_symbol = 0; /* lookup_symbol */ |
| 1049 | eb_ops.to_create_inferior = eb_create_inferior; |
| 1050 | eb_ops.to_post_startup_inferior = NULL; |
| 1051 | eb_ops.to_acknowledge_created_inferior = NULL; |
| 1052 | eb_ops.to_clone_and_follow_inferior = NULL; |
| 1053 | eb_ops.to_post_follow_inferior_by_clone = NULL; |
| 1054 | eb_ops.to_insert_fork_catchpoint = NULL; |
| 1055 | eb_ops.to_remove_fork_catchpoint = NULL; |
| 1056 | eb_ops.to_insert_vfork_catchpoint = NULL; |
| 1057 | eb_ops.to_remove_vfork_catchpoint = NULL; |
| 1058 | eb_ops.to_has_forked = NULL; |
| 1059 | eb_ops.to_has_vforked = NULL; |
| 1060 | eb_ops.to_can_follow_vfork_prior_to_exec = NULL; |
| 1061 | eb_ops.to_post_follow_vfork = NULL; |
| 1062 | eb_ops.to_insert_exec_catchpoint = NULL; |
| 1063 | eb_ops.to_remove_exec_catchpoint = NULL; |
| 1064 | eb_ops.to_has_execd = NULL; |
| 1065 | eb_ops.to_reported_exec_events_per_exec_call = NULL; |
| 1066 | eb_ops.to_has_exited = NULL; |
| 1067 | eb_ops.to_mourn_inferior = eb_mourn_inferior; |
| 1068 | eb_ops.to_can_run = 0; /* can_run */ |
| 1069 | eb_ops.to_notice_signals = 0; /* notice_signals */ |
| 1070 | eb_ops.to_thread_alive = 0; /* thread-alive */ |
| 1071 | eb_ops.to_stop = 0; /* to_stop */ |
| 1072 | eb_ops.to_pid_to_exec_file = NULL; |
| 1073 | eb_ops.to_core_file_to_sym_file = NULL; |
| 1074 | eb_ops.to_stratum = process_stratum; |
| 1075 | eb_ops.DONT_USE = 0; /* next */ |
| 1076 | eb_ops.to_has_all_memory = 1; |
| 1077 | eb_ops.to_has_memory = 1; |
| 1078 | eb_ops.to_has_stack = 1; |
| 1079 | eb_ops.to_has_registers = 1; |
| 1080 | eb_ops.to_has_execution = 1; /* all mem, mem, stack, regs, exec */ |
| 1081 | eb_ops.to_sections = 0; /* sections */ |
| 1082 | eb_ops.to_sections_end = 0; /* sections end */ |
| 1083 | eb_ops.to_magic = OPS_MAGIC; /* Always the last thing */ |
| 1084 | }; |
| 1085 | |
| 1086 | void |
| 1087 | _initialize_remote_eb (void) |
| 1088 | { |
| 1089 | init_eb_ops (); |
| 1090 | add_target (&eb_ops); |
| 1091 | } |