| 1 | /* Remote utility routines for the remote server for GDB. |
| 2 | Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 3 | 2002, 2003, 2004 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include "server.h" |
| 24 | #include "terminal.h" |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
| 27 | #include <sys/ioctl.h> |
| 28 | #include <sys/file.h> |
| 29 | #include <netinet/in.h> |
| 30 | #include <sys/socket.h> |
| 31 | #include <netdb.h> |
| 32 | #include <netinet/tcp.h> |
| 33 | #include <sys/ioctl.h> |
| 34 | #include <signal.h> |
| 35 | #include <fcntl.h> |
| 36 | #include <sys/time.h> |
| 37 | #include <unistd.h> |
| 38 | #include <arpa/inet.h> |
| 39 | |
| 40 | int remote_debug = 0; |
| 41 | struct ui_file *gdb_stdlog; |
| 42 | |
| 43 | static int remote_desc; |
| 44 | |
| 45 | /* FIXME headerize? */ |
| 46 | extern int using_threads; |
| 47 | extern int debug_threads; |
| 48 | |
| 49 | /* Open a connection to a remote debugger. |
| 50 | NAME is the filename used for communication. */ |
| 51 | |
| 52 | void |
| 53 | remote_open (char *name) |
| 54 | { |
| 55 | int save_fcntl_flags; |
| 56 | |
| 57 | if (!strchr (name, ':')) |
| 58 | { |
| 59 | remote_desc = open (name, O_RDWR); |
| 60 | if (remote_desc < 0) |
| 61 | perror_with_name ("Could not open remote device"); |
| 62 | |
| 63 | #ifdef HAVE_TERMIOS |
| 64 | { |
| 65 | struct termios termios; |
| 66 | tcgetattr (remote_desc, &termios); |
| 67 | |
| 68 | termios.c_iflag = 0; |
| 69 | termios.c_oflag = 0; |
| 70 | termios.c_lflag = 0; |
| 71 | termios.c_cflag &= ~(CSIZE | PARENB); |
| 72 | termios.c_cflag |= CLOCAL | CS8; |
| 73 | termios.c_cc[VMIN] = 1; |
| 74 | termios.c_cc[VTIME] = 0; |
| 75 | |
| 76 | tcsetattr (remote_desc, TCSANOW, &termios); |
| 77 | } |
| 78 | #endif |
| 79 | |
| 80 | #ifdef HAVE_TERMIO |
| 81 | { |
| 82 | struct termio termio; |
| 83 | ioctl (remote_desc, TCGETA, &termio); |
| 84 | |
| 85 | termio.c_iflag = 0; |
| 86 | termio.c_oflag = 0; |
| 87 | termio.c_lflag = 0; |
| 88 | termio.c_cflag &= ~(CSIZE | PARENB); |
| 89 | termio.c_cflag |= CLOCAL | CS8; |
| 90 | termio.c_cc[VMIN] = 1; |
| 91 | termio.c_cc[VTIME] = 0; |
| 92 | |
| 93 | ioctl (remote_desc, TCSETA, &termio); |
| 94 | } |
| 95 | #endif |
| 96 | |
| 97 | #ifdef HAVE_SGTTY |
| 98 | { |
| 99 | struct sgttyb sg; |
| 100 | |
| 101 | ioctl (remote_desc, TIOCGETP, &sg); |
| 102 | sg.sg_flags = RAW; |
| 103 | ioctl (remote_desc, TIOCSETP, &sg); |
| 104 | } |
| 105 | #endif |
| 106 | |
| 107 | fprintf (stderr, "Remote debugging using %s\n", name); |
| 108 | } |
| 109 | else |
| 110 | { |
| 111 | char *port_str; |
| 112 | int port; |
| 113 | struct sockaddr_in sockaddr; |
| 114 | int tmp; |
| 115 | int tmp_desc; |
| 116 | |
| 117 | port_str = strchr (name, ':'); |
| 118 | |
| 119 | port = atoi (port_str + 1); |
| 120 | |
| 121 | tmp_desc = socket (PF_INET, SOCK_STREAM, 0); |
| 122 | if (tmp_desc < 0) |
| 123 | perror_with_name ("Can't open socket"); |
| 124 | |
| 125 | /* Allow rapid reuse of this port. */ |
| 126 | tmp = 1; |
| 127 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
| 128 | sizeof (tmp)); |
| 129 | |
| 130 | sockaddr.sin_family = PF_INET; |
| 131 | sockaddr.sin_port = htons (port); |
| 132 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
| 133 | |
| 134 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
| 135 | || listen (tmp_desc, 1)) |
| 136 | perror_with_name ("Can't bind address"); |
| 137 | |
| 138 | tmp = sizeof (sockaddr); |
| 139 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
| 140 | if (remote_desc == -1) |
| 141 | perror_with_name ("Accept failed"); |
| 142 | |
| 143 | /* Enable TCP keep alive process. */ |
| 144 | tmp = 1; |
| 145 | setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); |
| 146 | |
| 147 | /* Tell TCP not to delay small packets. This greatly speeds up |
| 148 | interactive response. */ |
| 149 | tmp = 1; |
| 150 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, |
| 151 | (char *) &tmp, sizeof (tmp)); |
| 152 | |
| 153 | close (tmp_desc); /* No longer need this */ |
| 154 | |
| 155 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
| 156 | exits when the remote side dies. */ |
| 157 | |
| 158 | /* Convert IP address to string. */ |
| 159 | fprintf (stderr, "Remote debugging from host %s\n", |
| 160 | inet_ntoa (sockaddr.sin_addr)); |
| 161 | } |
| 162 | |
| 163 | #if defined(F_SETFL) && defined (FASYNC) |
| 164 | save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0); |
| 165 | fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC); |
| 166 | #if defined (F_SETOWN) |
| 167 | fcntl (remote_desc, F_SETOWN, getpid ()); |
| 168 | #endif |
| 169 | #endif |
| 170 | disable_async_io (); |
| 171 | } |
| 172 | |
| 173 | void |
| 174 | remote_close (void) |
| 175 | { |
| 176 | close (remote_desc); |
| 177 | } |
| 178 | |
| 179 | /* Convert hex digit A to a number. */ |
| 180 | |
| 181 | static int |
| 182 | fromhex (int a) |
| 183 | { |
| 184 | if (a >= '0' && a <= '9') |
| 185 | return a - '0'; |
| 186 | else if (a >= 'a' && a <= 'f') |
| 187 | return a - 'a' + 10; |
| 188 | else |
| 189 | error ("Reply contains invalid hex digit"); |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | int |
| 194 | unhexify (char *bin, const char *hex, int count) |
| 195 | { |
| 196 | int i; |
| 197 | |
| 198 | for (i = 0; i < count; i++) |
| 199 | { |
| 200 | if (hex[0] == 0 || hex[1] == 0) |
| 201 | { |
| 202 | /* Hex string is short, or of uneven length. |
| 203 | Return the count that has been converted so far. */ |
| 204 | return i; |
| 205 | } |
| 206 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); |
| 207 | hex += 2; |
| 208 | } |
| 209 | return i; |
| 210 | } |
| 211 | |
| 212 | static void |
| 213 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
| 214 | { |
| 215 | CORE_ADDR addr; |
| 216 | char ch; |
| 217 | int i; |
| 218 | |
| 219 | addr = 0; |
| 220 | for (i = 0; i < len; i++) |
| 221 | { |
| 222 | ch = start[i]; |
| 223 | addr = addr << 4; |
| 224 | addr = addr | (fromhex (ch) & 0x0f); |
| 225 | } |
| 226 | *addrp = addr; |
| 227 | } |
| 228 | |
| 229 | /* Convert number NIB to a hex digit. */ |
| 230 | |
| 231 | static int |
| 232 | tohex (int nib) |
| 233 | { |
| 234 | if (nib < 10) |
| 235 | return '0' + nib; |
| 236 | else |
| 237 | return 'a' + nib - 10; |
| 238 | } |
| 239 | |
| 240 | int |
| 241 | hexify (char *hex, const char *bin, int count) |
| 242 | { |
| 243 | int i; |
| 244 | |
| 245 | /* May use a length, or a nul-terminated string as input. */ |
| 246 | if (count == 0) |
| 247 | count = strlen (bin); |
| 248 | |
| 249 | for (i = 0; i < count; i++) |
| 250 | { |
| 251 | *hex++ = tohex ((*bin >> 4) & 0xf); |
| 252 | *hex++ = tohex (*bin++ & 0xf); |
| 253 | } |
| 254 | *hex = 0; |
| 255 | return i; |
| 256 | } |
| 257 | |
| 258 | /* Send a packet to the remote machine, with error checking. |
| 259 | The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */ |
| 260 | |
| 261 | int |
| 262 | putpkt (char *buf) |
| 263 | { |
| 264 | int i; |
| 265 | unsigned char csum = 0; |
| 266 | char *buf2; |
| 267 | char buf3[1]; |
| 268 | int cnt = strlen (buf); |
| 269 | char *p; |
| 270 | |
| 271 | buf2 = malloc (PBUFSIZ); |
| 272 | |
| 273 | /* Copy the packet into buffer BUF2, encapsulating it |
| 274 | and giving it a checksum. */ |
| 275 | |
| 276 | p = buf2; |
| 277 | *p++ = '$'; |
| 278 | |
| 279 | for (i = 0; i < cnt; i++) |
| 280 | { |
| 281 | csum += buf[i]; |
| 282 | *p++ = buf[i]; |
| 283 | } |
| 284 | *p++ = '#'; |
| 285 | *p++ = tohex ((csum >> 4) & 0xf); |
| 286 | *p++ = tohex (csum & 0xf); |
| 287 | |
| 288 | *p = '\0'; |
| 289 | |
| 290 | /* Send it over and over until we get a positive ack. */ |
| 291 | |
| 292 | do |
| 293 | { |
| 294 | int cc; |
| 295 | |
| 296 | if (write (remote_desc, buf2, p - buf2) != p - buf2) |
| 297 | { |
| 298 | perror ("putpkt(write)"); |
| 299 | return -1; |
| 300 | } |
| 301 | |
| 302 | if (remote_debug) |
| 303 | { |
| 304 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); |
| 305 | fflush (stderr); |
| 306 | } |
| 307 | cc = read (remote_desc, buf3, 1); |
| 308 | if (remote_debug) |
| 309 | { |
| 310 | fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]); |
| 311 | fflush (stderr); |
| 312 | } |
| 313 | |
| 314 | if (cc <= 0) |
| 315 | { |
| 316 | if (cc == 0) |
| 317 | fprintf (stderr, "putpkt(read): Got EOF\n"); |
| 318 | else |
| 319 | perror ("putpkt(read)"); |
| 320 | |
| 321 | free (buf2); |
| 322 | return -1; |
| 323 | } |
| 324 | |
| 325 | /* Check for an input interrupt while we're here. */ |
| 326 | if (buf3[0] == '\003') |
| 327 | (*the_target->send_signal) (SIGINT); |
| 328 | } |
| 329 | while (buf3[0] != '+'); |
| 330 | |
| 331 | free (buf2); |
| 332 | return 1; /* Success! */ |
| 333 | } |
| 334 | |
| 335 | /* Come here when we get an input interrupt from the remote side. This |
| 336 | interrupt should only be active while we are waiting for the child to do |
| 337 | something. About the only thing that should come through is a ^C, which |
| 338 | will cause us to send a SIGINT to the child. */ |
| 339 | |
| 340 | static void |
| 341 | input_interrupt (int unused) |
| 342 | { |
| 343 | fd_set readset; |
| 344 | struct timeval immediate = { 0, 0 }; |
| 345 | |
| 346 | /* Protect against spurious interrupts. This has been observed to |
| 347 | be a problem under NetBSD 1.4 and 1.5. */ |
| 348 | |
| 349 | FD_ZERO (&readset); |
| 350 | FD_SET (remote_desc, &readset); |
| 351 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) |
| 352 | { |
| 353 | int cc; |
| 354 | char c; |
| 355 | |
| 356 | cc = read (remote_desc, &c, 1); |
| 357 | |
| 358 | if (cc != 1 || c != '\003') |
| 359 | { |
| 360 | fprintf (stderr, "input_interrupt, cc = %d c = %d\n", cc, c); |
| 361 | return; |
| 362 | } |
| 363 | |
| 364 | (*the_target->send_signal) (SIGINT); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | void |
| 369 | enable_async_io (void) |
| 370 | { |
| 371 | signal (SIGIO, input_interrupt); |
| 372 | } |
| 373 | |
| 374 | void |
| 375 | disable_async_io (void) |
| 376 | { |
| 377 | signal (SIGIO, SIG_IGN); |
| 378 | } |
| 379 | |
| 380 | /* Returns next char from remote GDB. -1 if error. */ |
| 381 | |
| 382 | static int |
| 383 | readchar (void) |
| 384 | { |
| 385 | static char buf[BUFSIZ]; |
| 386 | static int bufcnt = 0; |
| 387 | static char *bufp; |
| 388 | |
| 389 | if (bufcnt-- > 0) |
| 390 | return *bufp++ & 0x7f; |
| 391 | |
| 392 | bufcnt = read (remote_desc, buf, sizeof (buf)); |
| 393 | |
| 394 | if (bufcnt <= 0) |
| 395 | { |
| 396 | if (bufcnt == 0) |
| 397 | fprintf (stderr, "readchar: Got EOF\n"); |
| 398 | else |
| 399 | perror ("readchar"); |
| 400 | |
| 401 | return -1; |
| 402 | } |
| 403 | |
| 404 | bufp = buf; |
| 405 | bufcnt--; |
| 406 | return *bufp++ & 0x7f; |
| 407 | } |
| 408 | |
| 409 | /* Read a packet from the remote machine, with error checking, |
| 410 | and store it in BUF. Returns length of packet, or negative if error. */ |
| 411 | |
| 412 | int |
| 413 | getpkt (char *buf) |
| 414 | { |
| 415 | char *bp; |
| 416 | unsigned char csum, c1, c2; |
| 417 | int c; |
| 418 | |
| 419 | while (1) |
| 420 | { |
| 421 | csum = 0; |
| 422 | |
| 423 | while (1) |
| 424 | { |
| 425 | c = readchar (); |
| 426 | if (c == '$') |
| 427 | break; |
| 428 | if (remote_debug) |
| 429 | { |
| 430 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); |
| 431 | fflush (stderr); |
| 432 | } |
| 433 | |
| 434 | if (c < 0) |
| 435 | return -1; |
| 436 | } |
| 437 | |
| 438 | bp = buf; |
| 439 | while (1) |
| 440 | { |
| 441 | c = readchar (); |
| 442 | if (c < 0) |
| 443 | return -1; |
| 444 | if (c == '#') |
| 445 | break; |
| 446 | *bp++ = c; |
| 447 | csum += c; |
| 448 | } |
| 449 | *bp = 0; |
| 450 | |
| 451 | c1 = fromhex (readchar ()); |
| 452 | c2 = fromhex (readchar ()); |
| 453 | |
| 454 | if (csum == (c1 << 4) + c2) |
| 455 | break; |
| 456 | |
| 457 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
| 458 | (c1 << 4) + c2, csum, buf); |
| 459 | write (remote_desc, "-", 1); |
| 460 | } |
| 461 | |
| 462 | if (remote_debug) |
| 463 | { |
| 464 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); |
| 465 | fflush (stderr); |
| 466 | } |
| 467 | |
| 468 | write (remote_desc, "+", 1); |
| 469 | |
| 470 | if (remote_debug) |
| 471 | { |
| 472 | fprintf (stderr, "[sent ack]\n"); |
| 473 | fflush (stderr); |
| 474 | } |
| 475 | |
| 476 | return bp - buf; |
| 477 | } |
| 478 | |
| 479 | void |
| 480 | write_ok (char *buf) |
| 481 | { |
| 482 | buf[0] = 'O'; |
| 483 | buf[1] = 'K'; |
| 484 | buf[2] = '\0'; |
| 485 | } |
| 486 | |
| 487 | void |
| 488 | write_enn (char *buf) |
| 489 | { |
| 490 | /* Some day, we should define the meanings of the error codes... */ |
| 491 | buf[0] = 'E'; |
| 492 | buf[1] = '0'; |
| 493 | buf[2] = '1'; |
| 494 | buf[3] = '\0'; |
| 495 | } |
| 496 | |
| 497 | void |
| 498 | convert_int_to_ascii (char *from, char *to, int n) |
| 499 | { |
| 500 | int nib; |
| 501 | char ch; |
| 502 | while (n--) |
| 503 | { |
| 504 | ch = *from++; |
| 505 | nib = ((ch & 0xf0) >> 4) & 0x0f; |
| 506 | *to++ = tohex (nib); |
| 507 | nib = ch & 0x0f; |
| 508 | *to++ = tohex (nib); |
| 509 | } |
| 510 | *to++ = 0; |
| 511 | } |
| 512 | |
| 513 | |
| 514 | void |
| 515 | convert_ascii_to_int (char *from, char *to, int n) |
| 516 | { |
| 517 | int nib1, nib2; |
| 518 | while (n--) |
| 519 | { |
| 520 | nib1 = fromhex (*from++); |
| 521 | nib2 = fromhex (*from++); |
| 522 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | static char * |
| 527 | outreg (int regno, char *buf) |
| 528 | { |
| 529 | if ((regno >> 12) != 0) |
| 530 | *buf++ = tohex ((regno >> 12) & 0xf); |
| 531 | if ((regno >> 8) != 0) |
| 532 | *buf++ = tohex ((regno >> 8) & 0xf); |
| 533 | *buf++ = tohex ((regno >> 4) & 0xf); |
| 534 | *buf++ = tohex (regno & 0xf); |
| 535 | *buf++ = ':'; |
| 536 | collect_register_as_string (regno, buf); |
| 537 | buf += 2 * register_size (regno); |
| 538 | *buf++ = ';'; |
| 539 | |
| 540 | return buf; |
| 541 | } |
| 542 | |
| 543 | void |
| 544 | new_thread_notify (int id) |
| 545 | { |
| 546 | char own_buf[256]; |
| 547 | |
| 548 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ |
| 549 | if (1) |
| 550 | return; |
| 551 | |
| 552 | if (server_waiting == 0) |
| 553 | return; |
| 554 | |
| 555 | sprintf (own_buf, "n%x", id); |
| 556 | disable_async_io (); |
| 557 | putpkt (own_buf); |
| 558 | enable_async_io (); |
| 559 | } |
| 560 | |
| 561 | void |
| 562 | dead_thread_notify (int id) |
| 563 | { |
| 564 | char own_buf[256]; |
| 565 | |
| 566 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ |
| 567 | if (1) |
| 568 | return; |
| 569 | |
| 570 | sprintf (own_buf, "x%x", id); |
| 571 | disable_async_io (); |
| 572 | putpkt (own_buf); |
| 573 | enable_async_io (); |
| 574 | } |
| 575 | |
| 576 | void |
| 577 | prepare_resume_reply (char *buf, char status, unsigned char signo) |
| 578 | { |
| 579 | int nib, sig; |
| 580 | |
| 581 | *buf++ = status; |
| 582 | |
| 583 | sig = (int)target_signal_from_host (signo); |
| 584 | |
| 585 | nib = ((sig & 0xf0) >> 4); |
| 586 | *buf++ = tohex (nib); |
| 587 | nib = sig & 0x0f; |
| 588 | *buf++ = tohex (nib); |
| 589 | |
| 590 | if (status == 'T') |
| 591 | { |
| 592 | const char **regp = gdbserver_expedite_regs; |
| 593 | while (*regp) |
| 594 | { |
| 595 | buf = outreg (find_regno (*regp), buf); |
| 596 | regp ++; |
| 597 | } |
| 598 | |
| 599 | /* Formerly, if the debugger had not used any thread features we would not |
| 600 | burden it with a thread status response. This was for the benefit of |
| 601 | GDB 4.13 and older. However, in recent GDB versions the check |
| 602 | (``if (cont_thread != 0)'') does not have the desired effect because of |
| 603 | sillyness in the way that the remote protocol handles specifying a thread. |
| 604 | Since thread support relies on qSymbol support anyway, assume GDB can handle |
| 605 | threads. */ |
| 606 | |
| 607 | if (using_threads) |
| 608 | { |
| 609 | /* FIXME right place to set this? */ |
| 610 | thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id; |
| 611 | if (debug_threads) |
| 612 | fprintf (stderr, "Writing resume reply for %d\n\n", thread_from_wait); |
| 613 | if (old_thread_from_wait != thread_from_wait) |
| 614 | { |
| 615 | general_thread = thread_from_wait; |
| 616 | sprintf (buf, "thread:%x;", thread_from_wait); |
| 617 | buf += strlen (buf); |
| 618 | old_thread_from_wait = thread_from_wait; |
| 619 | } |
| 620 | } |
| 621 | } |
| 622 | /* For W and X, we're done. */ |
| 623 | *buf++ = 0; |
| 624 | } |
| 625 | |
| 626 | void |
| 627 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
| 628 | { |
| 629 | int i = 0, j = 0; |
| 630 | char ch; |
| 631 | *mem_addr_ptr = *len_ptr = 0; |
| 632 | |
| 633 | while ((ch = from[i++]) != ',') |
| 634 | { |
| 635 | *mem_addr_ptr = *mem_addr_ptr << 4; |
| 636 | *mem_addr_ptr |= fromhex (ch) & 0x0f; |
| 637 | } |
| 638 | |
| 639 | for (j = 0; j < 4; j++) |
| 640 | { |
| 641 | if ((ch = from[i++]) == 0) |
| 642 | break; |
| 643 | *len_ptr = *len_ptr << 4; |
| 644 | *len_ptr |= fromhex (ch) & 0x0f; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | void |
| 649 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
| 650 | char *to) |
| 651 | { |
| 652 | int i = 0; |
| 653 | char ch; |
| 654 | *mem_addr_ptr = *len_ptr = 0; |
| 655 | |
| 656 | while ((ch = from[i++]) != ',') |
| 657 | { |
| 658 | *mem_addr_ptr = *mem_addr_ptr << 4; |
| 659 | *mem_addr_ptr |= fromhex (ch) & 0x0f; |
| 660 | } |
| 661 | |
| 662 | while ((ch = from[i++]) != ':') |
| 663 | { |
| 664 | *len_ptr = *len_ptr << 4; |
| 665 | *len_ptr |= fromhex (ch) & 0x0f; |
| 666 | } |
| 667 | |
| 668 | convert_ascii_to_int (&from[i++], to, *len_ptr); |
| 669 | } |
| 670 | |
| 671 | int |
| 672 | look_up_one_symbol (const char *name, CORE_ADDR *addrp) |
| 673 | { |
| 674 | char own_buf[266], *p, *q; |
| 675 | int len; |
| 676 | |
| 677 | /* Send the request. */ |
| 678 | strcpy (own_buf, "qSymbol:"); |
| 679 | hexify (own_buf + strlen ("qSymbol:"), name, strlen (name)); |
| 680 | if (putpkt (own_buf) < 0) |
| 681 | return -1; |
| 682 | |
| 683 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ |
| 684 | len = getpkt (own_buf); |
| 685 | if (len < 0) |
| 686 | return -1; |
| 687 | |
| 688 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) |
| 689 | { |
| 690 | /* Malformed response. */ |
| 691 | if (remote_debug) |
| 692 | { |
| 693 | fprintf (stderr, "Malformed response to qSymbol, ignoring.\n"); |
| 694 | fflush (stderr); |
| 695 | } |
| 696 | |
| 697 | return -1; |
| 698 | } |
| 699 | |
| 700 | p = own_buf + strlen ("qSymbol:"); |
| 701 | q = p; |
| 702 | while (*q && *q != ':') |
| 703 | q++; |
| 704 | |
| 705 | /* Make sure we found a value for the symbol. */ |
| 706 | if (p == q || *q == '\0') |
| 707 | return 0; |
| 708 | |
| 709 | decode_address (addrp, p, q - p); |
| 710 | return 1; |
| 711 | } |
| 712 | |