| 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 | |
| 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 | /* Let 'er rip... */ |
| 271 | proceed ((CORE_ADDR)entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
| 272 | } |
| 273 | |
| 274 | /* Open a connection to a remote debugger. |
| 275 | NAME is the filename used for communication. */ |
| 276 | |
| 277 | static int baudrate = 9600; |
| 278 | static char dev_name[100]; |
| 279 | |
| 280 | static void |
| 281 | st2000_open(args, from_tty) |
| 282 | char *args; |
| 283 | int from_tty; |
| 284 | { |
| 285 | int n; |
| 286 | char junk[100]; |
| 287 | |
| 288 | target_preopen(from_tty); |
| 289 | |
| 290 | n = sscanf(args, " %s %d %s", dev_name, &baudrate, junk); |
| 291 | |
| 292 | if (n != 2) |
| 293 | error("Bad arguments. Usage: target st2000 <device> <speed>\n\ |
| 294 | or target st2000 <host> <port>\n"); |
| 295 | |
| 296 | st2000_close(0); |
| 297 | |
| 298 | st2000_desc = SERIAL_OPEN(dev_name); |
| 299 | |
| 300 | if (!st2000_desc) |
| 301 | perror_with_name(dev_name); |
| 302 | |
| 303 | SERIAL_SETBAUDRATE(st2000_desc, baudrate); |
| 304 | |
| 305 | SERIAL_RAW(st2000_desc); |
| 306 | |
| 307 | push_target(&st2000_ops); |
| 308 | |
| 309 | #if defined (LOG_FILE) |
| 310 | log_file = fopen (LOG_FILE, "w"); |
| 311 | if (log_file == NULL) |
| 312 | perror_with_name (LOG_FILE); |
| 313 | #endif |
| 314 | |
| 315 | /* Hello? Are you there? */ |
| 316 | printf_stdebug("\003"); /* ^C wakes up dbug */ |
| 317 | |
| 318 | expect_prompt(1); |
| 319 | |
| 320 | if (from_tty) |
| 321 | printf("Remote %s connected to %s\n", target_shortname, |
| 322 | dev_name); |
| 323 | } |
| 324 | |
| 325 | /* Close out all files and local state before this target loses control. */ |
| 326 | |
| 327 | static void |
| 328 | st2000_close (quitting) |
| 329 | int quitting; |
| 330 | { |
| 331 | SERIAL_CLOSE(st2000_desc); |
| 332 | |
| 333 | #if defined (LOG_FILE) |
| 334 | if (log_file) { |
| 335 | if (ferror(log_file)) |
| 336 | fprintf(stderr, "Error writing log file.\n"); |
| 337 | if (fclose(log_file) != 0) |
| 338 | fprintf(stderr, "Error closing log file.\n"); |
| 339 | } |
| 340 | #endif |
| 341 | } |
| 342 | |
| 343 | /* Terminate the open connection to the remote debugger. |
| 344 | Use this when you want to detach and do something else |
| 345 | with your gdb. */ |
| 346 | static void |
| 347 | st2000_detach (from_tty) |
| 348 | int from_tty; |
| 349 | { |
| 350 | pop_target(); /* calls st2000_close to do the real work */ |
| 351 | if (from_tty) |
| 352 | printf ("Ending remote %s debugging\n", target_shortname); |
| 353 | } |
| 354 | |
| 355 | /* Tell the remote machine to resume. */ |
| 356 | |
| 357 | static void |
| 358 | st2000_resume (pid, step, sig) |
| 359 | int pid, step; |
| 360 | enum target_signal sig; |
| 361 | { |
| 362 | if (step) |
| 363 | { |
| 364 | printf_stdebug ("ST\r"); |
| 365 | /* Wait for the echo. */ |
| 366 | expect ("ST\r", 1); |
| 367 | } |
| 368 | else |
| 369 | { |
| 370 | printf_stdebug ("GO\r"); |
| 371 | /* Swallow the echo. */ |
| 372 | expect ("GO\r", 1); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | /* Wait until the remote machine stops, then return, |
| 377 | storing status in STATUS just as `wait' would. */ |
| 378 | |
| 379 | static int |
| 380 | st2000_wait (status) |
| 381 | struct target_waitstatus *status; |
| 382 | { |
| 383 | int old_timeout = timeout; |
| 384 | |
| 385 | status->kind = TARGET_WAITKIND_EXITED; |
| 386 | status->value.integer = 0; |
| 387 | |
| 388 | timeout = 0; /* Don't time out -- user program is running. */ |
| 389 | |
| 390 | expect_prompt(0); /* Wait for prompt, outputting extraneous text */ |
| 391 | |
| 392 | status->kind = TARGET_WAITKIND_STOPPED; |
| 393 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 394 | |
| 395 | timeout = old_timeout; |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 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! */ |
| 403 | |
| 404 | static char * |
| 405 | get_reg_name (regno) |
| 406 | int regno; |
| 407 | { |
| 408 | static char buf[50]; |
| 409 | const char *p; |
| 410 | char *b; |
| 411 | |
| 412 | b = buf; |
| 413 | |
| 414 | for (p = reg_names[regno]; *p; p++) |
| 415 | *b++ = toupper(*p); |
| 416 | *b = '\000'; |
| 417 | |
| 418 | return buf; |
| 419 | } |
| 420 | |
| 421 | /* Read the remote registers into the block REGS. */ |
| 422 | |
| 423 | static void |
| 424 | st2000_fetch_registers () |
| 425 | { |
| 426 | int regno; |
| 427 | |
| 428 | /* Yeah yeah, I know this is horribly inefficient. But it isn't done |
| 429 | very often... I'll clean it up later. */ |
| 430 | |
| 431 | for (regno = 0; regno <= PC_REGNUM; regno++) |
| 432 | st2000_fetch_register(regno); |
| 433 | } |
| 434 | |
| 435 | /* Fetch register REGNO, or all registers if REGNO is -1. |
| 436 | Returns errno value. */ |
| 437 | static void |
| 438 | st2000_fetch_register (regno) |
| 439 | int regno; |
| 440 | { |
| 441 | if (regno == -1) |
| 442 | st2000_fetch_registers (); |
| 443 | else |
| 444 | { |
| 445 | char *name = get_reg_name (regno); |
| 446 | printf_stdebug ("DR %s\r", name); |
| 447 | expect (name, 1); |
| 448 | expect (" : ", 1); |
| 449 | get_hex_regs (1, regno); |
| 450 | expect_prompt (1); |
| 451 | } |
| 452 | return; |
| 453 | } |
| 454 | |
| 455 | /* Store the remote registers from the contents of the block REGS. */ |
| 456 | |
| 457 | static void |
| 458 | st2000_store_registers () |
| 459 | { |
| 460 | int regno; |
| 461 | |
| 462 | for (regno = 0; regno <= PC_REGNUM; regno++) |
| 463 | st2000_store_register(regno); |
| 464 | |
| 465 | registers_changed (); |
| 466 | } |
| 467 | |
| 468 | /* Store register REGNO, or all if REGNO == 0. |
| 469 | Return errno value. */ |
| 470 | static void |
| 471 | st2000_store_register (regno) |
| 472 | int regno; |
| 473 | { |
| 474 | if (regno == -1) |
| 475 | st2000_store_registers (); |
| 476 | else |
| 477 | { |
| 478 | printf_stdebug ("PR %s %x\r", get_reg_name (regno), |
| 479 | read_register (regno)); |
| 480 | |
| 481 | expect_prompt (1); |
| 482 | } |
| 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 | |
| 491 | static void |
| 492 | st2000_prepare_to_store () |
| 493 | { |
| 494 | /* Do nothing, since we can store individual regs */ |
| 495 | } |
| 496 | |
| 497 | static void |
| 498 | st2000_files_info () |
| 499 | { |
| 500 | printf ("\tAttached to %s at %d baud.\n", |
| 501 | dev_name, baudrate); |
| 502 | } |
| 503 | |
| 504 | /* Copy LEN bytes of data from debugger memory at MYADDR |
| 505 | to inferior's memory at MEMADDR. Returns length moved. */ |
| 506 | static int |
| 507 | st2000_write_inferior_memory (memaddr, myaddr, len) |
| 508 | CORE_ADDR memaddr; |
| 509 | unsigned char *myaddr; |
| 510 | int len; |
| 511 | { |
| 512 | int i; |
| 513 | |
| 514 | for (i = 0; i < len; i++) |
| 515 | { |
| 516 | printf_stdebug ("PM.B %x %x\r", memaddr + i, myaddr[i]); |
| 517 | expect_prompt (1); |
| 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. */ |
| 524 | static int |
| 525 | st2000_read_inferior_memory(memaddr, myaddr, len) |
| 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 |
| 544 | st2000_read_bytes (CORE_ADDR_MAX - 4, foo, 4) |
| 545 | works--it never adds len to memaddr and gets 0. */ |
| 546 | /* However, something like |
| 547 | st2000_read_bytes (CORE_ADDR_MAX - 3, foo, 4) |
| 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 | |
| 565 | printf_stdebug ("DI.L %x %x\r", startaddr, len_this_pass); |
| 566 | expect (": ", 1); |
| 567 | |
| 568 | for (i = 0; i < len_this_pass; i++) |
| 569 | get_hex_byte (&myaddr[count++]); |
| 570 | |
| 571 | expect_prompt (1); |
| 572 | |
| 573 | startaddr += len_this_pass; |
| 574 | } |
| 575 | return len; |
| 576 | } |
| 577 | |
| 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 | |
| 593 | static void |
| 594 | st2000_kill (args, from_tty) |
| 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 | |
| 607 | static void |
| 608 | st2000_mourn_inferior () |
| 609 | { |
| 610 | remove_breakpoints (); |
| 611 | unpush_target (&st2000_ops); |
| 612 | generic_mourn_inferior (); /* Do all the proper things now */ |
| 613 | } |
| 614 | |
| 615 | #define MAX_STDEBUG_BREAKPOINTS 16 |
| 616 | |
| 617 | extern int memory_breakpoint_size; |
| 618 | static CORE_ADDR breakaddr[MAX_STDEBUG_BREAKPOINTS] = {0}; |
| 619 | |
| 620 | static int |
| 621 | st2000_insert_breakpoint (addr, shadow) |
| 622 | CORE_ADDR addr; |
| 623 | char *shadow; |
| 624 | { |
| 625 | int i; |
| 626 | |
| 627 | for (i = 0; i <= MAX_STDEBUG_BREAKPOINTS; i++) |
| 628 | if (breakaddr[i] == 0) |
| 629 | { |
| 630 | breakaddr[i] = addr; |
| 631 | |
| 632 | st2000_read_inferior_memory(addr, shadow, memory_breakpoint_size); |
| 633 | printf_stdebug("BR %x H\r", addr); |
| 634 | expect_prompt(1); |
| 635 | return 0; |
| 636 | } |
| 637 | |
| 638 | fprintf(stderr, "Too many breakpoints (> 16) for STDBUG\n"); |
| 639 | return 1; |
| 640 | } |
| 641 | |
| 642 | static int |
| 643 | st2000_remove_breakpoint (addr, shadow) |
| 644 | CORE_ADDR addr; |
| 645 | char *shadow; |
| 646 | { |
| 647 | int i; |
| 648 | |
| 649 | for (i = 0; i < MAX_STDEBUG_BREAKPOINTS; i++) |
| 650 | if (breakaddr[i] == addr) |
| 651 | { |
| 652 | breakaddr[i] = 0; |
| 653 | |
| 654 | printf_stdebug("CB %d\r", i); |
| 655 | expect_prompt(1); |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr); |
| 660 | return 1; |
| 661 | } |
| 662 | |
| 663 | |
| 664 | /* Put a command string, in args, out to STDBUG. Output from STDBUG is placed |
| 665 | on the users terminal until the prompt is seen. */ |
| 666 | |
| 667 | static void |
| 668 | st2000_command (args, fromtty) |
| 669 | char *args; |
| 670 | int fromtty; |
| 671 | { |
| 672 | if (!st2000_desc) |
| 673 | error("st2000 target not open."); |
| 674 | |
| 675 | if (!args) |
| 676 | error("Missing command."); |
| 677 | |
| 678 | printf_stdebug("%s\r", args); |
| 679 | expect_prompt(0); |
| 680 | } |
| 681 | |
| 682 | /* Connect the user directly to STDBUG. This command acts just like the |
| 683 | 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */ |
| 684 | |
| 685 | /*static struct ttystate ttystate;*/ |
| 686 | |
| 687 | static void |
| 688 | cleanup_tty() |
| 689 | { |
| 690 | printf("\r\n[Exiting connect mode]\r\n"); |
| 691 | /* SERIAL_RESTORE(0, &ttystate);*/ |
| 692 | } |
| 693 | |
| 694 | #if 0 |
| 695 | /* This all should now be in serial.c */ |
| 696 | |
| 697 | static void |
| 698 | connect_command (args, fromtty) |
| 699 | char *args; |
| 700 | int fromtty; |
| 701 | { |
| 702 | fd_set readfds; |
| 703 | int numfds; |
| 704 | int c; |
| 705 | char cur_esc = 0; |
| 706 | |
| 707 | dont_repeat(); |
| 708 | |
| 709 | if (st2000_desc < 0) |
| 710 | error("st2000 target not open."); |
| 711 | |
| 712 | if (args) |
| 713 | fprintf("This command takes no args. They have been ignored.\n"); |
| 714 | |
| 715 | printf("[Entering connect mode. Use ~. or ~^D to escape]\n"); |
| 716 | |
| 717 | serial_raw(0, &ttystate); |
| 718 | |
| 719 | make_cleanup(cleanup_tty, 0); |
| 720 | |
| 721 | FD_ZERO(&readfds); |
| 722 | |
| 723 | while (1) |
| 724 | { |
| 725 | do |
| 726 | { |
| 727 | FD_SET(0, &readfds); |
| 728 | FD_SET(st2000_desc, &readfds); |
| 729 | numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0); |
| 730 | } |
| 731 | while (numfds == 0); |
| 732 | |
| 733 | if (numfds < 0) |
| 734 | perror_with_name("select"); |
| 735 | |
| 736 | if (FD_ISSET(0, &readfds)) |
| 737 | { /* tty input, send to stdebug */ |
| 738 | c = getchar(); |
| 739 | if (c < 0) |
| 740 | perror_with_name("connect"); |
| 741 | |
| 742 | printf_stdebug("%c", c); |
| 743 | switch (cur_esc) |
| 744 | { |
| 745 | case 0: |
| 746 | if (c == '\r') |
| 747 | cur_esc = c; |
| 748 | break; |
| 749 | case '\r': |
| 750 | if (c == '~') |
| 751 | cur_esc = c; |
| 752 | else |
| 753 | cur_esc = 0; |
| 754 | break; |
| 755 | case '~': |
| 756 | if (c == '.' || c == '\004') |
| 757 | return; |
| 758 | else |
| 759 | cur_esc = 0; |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | if (FD_ISSET(st2000_desc, &readfds)) |
| 764 | { |
| 765 | while (1) |
| 766 | { |
| 767 | c = readchar(0); |
| 768 | if (c < 0) |
| 769 | break; |
| 770 | putchar(c); |
| 771 | } |
| 772 | fflush(stdout); |
| 773 | } |
| 774 | } |
| 775 | } |
| 776 | #endif /* 0 */ |
| 777 | |
| 778 | /* Define the target subroutine names */ |
| 779 | |
| 780 | struct target_ops st2000_ops = { |
| 781 | "st2000", |
| 782 | "Remote serial Tandem ST2000 target", |
| 783 | "Use a remote computer running STDEBUG connected by a serial line,\n\ |
| 784 | or a network connection.\n\ |
| 785 | Arguments are the name of the device for the serial line,\n\ |
| 786 | the speed to connect at in bits per second.", |
| 787 | st2000_open, |
| 788 | st2000_close, |
| 789 | 0, |
| 790 | st2000_detach, |
| 791 | st2000_resume, |
| 792 | st2000_wait, |
| 793 | st2000_fetch_register, |
| 794 | st2000_store_register, |
| 795 | st2000_prepare_to_store, |
| 796 | st2000_xfer_inferior_memory, |
| 797 | st2000_files_info, |
| 798 | st2000_insert_breakpoint, |
| 799 | st2000_remove_breakpoint, /* Breakpoints */ |
| 800 | 0, |
| 801 | 0, |
| 802 | 0, |
| 803 | 0, |
| 804 | 0, /* Terminal handling */ |
| 805 | st2000_kill, |
| 806 | 0, /* load */ |
| 807 | 0, /* lookup_symbol */ |
| 808 | st2000_create_inferior, |
| 809 | st2000_mourn_inferior, |
| 810 | 0, /* can_run */ |
| 811 | 0, /* notice_signals */ |
| 812 | process_stratum, |
| 813 | 0, /* next */ |
| 814 | 1, |
| 815 | 1, |
| 816 | 1, |
| 817 | 1, |
| 818 | 1, /* all mem, mem, stack, regs, exec */ |
| 819 | 0, |
| 820 | 0, /* Section pointers */ |
| 821 | OPS_MAGIC, /* Always the last thing */ |
| 822 | }; |
| 823 | |
| 824 | void |
| 825 | _initialize_remote_st2000 () |
| 826 | { |
| 827 | add_target (&st2000_ops); |
| 828 | add_com ("st2000 <command>", class_obscure, st2000_command, |
| 829 | "Send a command to the STDBUG monitor."); |
| 830 | add_com ("connect", class_obscure, connect_command, |
| 831 | "Connect the terminal directly up to the STDBUG command monitor.\n\ |
| 832 | Use <CR>~. or <CR>~^D to break out."); |
| 833 | } |