| 1 | /* Remote utility routines for the remote server for GDB. |
| 2 | Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "server.h" |
| 22 | #include "terminal.h" |
| 23 | #include "target.h" |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | #if HAVE_SYS_IOCTL_H |
| 27 | #include <sys/ioctl.h> |
| 28 | #endif |
| 29 | #if HAVE_SYS_FILE_H |
| 30 | #include <sys/file.h> |
| 31 | #endif |
| 32 | #if HAVE_NETINET_IN_H |
| 33 | #include <netinet/in.h> |
| 34 | #endif |
| 35 | #if HAVE_SYS_SOCKET_H |
| 36 | #include <sys/socket.h> |
| 37 | #endif |
| 38 | #if HAVE_NETDB_H |
| 39 | #include <netdb.h> |
| 40 | #endif |
| 41 | #if HAVE_NETINET_TCP_H |
| 42 | #include <netinet/tcp.h> |
| 43 | #endif |
| 44 | #if HAVE_SYS_IOCTL_H |
| 45 | #include <sys/ioctl.h> |
| 46 | #endif |
| 47 | #if HAVE_SIGNAL_H |
| 48 | #include <signal.h> |
| 49 | #endif |
| 50 | #if HAVE_FCNTL_H |
| 51 | #include <fcntl.h> |
| 52 | #endif |
| 53 | #include <sys/time.h> |
| 54 | #if HAVE_UNISTD_H |
| 55 | #include <unistd.h> |
| 56 | #endif |
| 57 | #if HAVE_ARPA_INET_H |
| 58 | #include <arpa/inet.h> |
| 59 | #endif |
| 60 | #include <sys/stat.h> |
| 61 | #if HAVE_ERRNO_H |
| 62 | #include <errno.h> |
| 63 | #endif |
| 64 | |
| 65 | #if USE_WIN32API |
| 66 | #include <winsock.h> |
| 67 | #endif |
| 68 | |
| 69 | #if __QNX__ |
| 70 | #include <sys/iomgr.h> |
| 71 | #endif /* __QNX__ */ |
| 72 | |
| 73 | #ifndef HAVE_SOCKLEN_T |
| 74 | typedef int socklen_t; |
| 75 | #endif |
| 76 | |
| 77 | #if USE_WIN32API |
| 78 | # define INVALID_DESCRIPTOR INVALID_SOCKET |
| 79 | #else |
| 80 | # define INVALID_DESCRIPTOR -1 |
| 81 | #endif |
| 82 | |
| 83 | /* A cache entry for a successfully looked-up symbol. */ |
| 84 | struct sym_cache |
| 85 | { |
| 86 | char *name; |
| 87 | CORE_ADDR addr; |
| 88 | struct sym_cache *next; |
| 89 | }; |
| 90 | |
| 91 | int remote_debug = 0; |
| 92 | struct ui_file *gdb_stdlog; |
| 93 | |
| 94 | static int remote_desc = INVALID_DESCRIPTOR; |
| 95 | |
| 96 | /* FIXME headerize? */ |
| 97 | extern int using_threads; |
| 98 | extern int debug_threads; |
| 99 | |
| 100 | /* If true, then GDB has requested noack mode. */ |
| 101 | int noack_mode = 0; |
| 102 | /* If true, then we tell GDB to use noack mode by default. */ |
| 103 | int transport_is_reliable = 0; |
| 104 | |
| 105 | #ifdef USE_WIN32API |
| 106 | # define read(fd, buf, len) recv (fd, (char *) buf, len, 0) |
| 107 | # define write(fd, buf, len) send (fd, (char *) buf, len, 0) |
| 108 | #endif |
| 109 | |
| 110 | /* Open a connection to a remote debugger. |
| 111 | NAME is the filename used for communication. */ |
| 112 | |
| 113 | void |
| 114 | remote_open (char *name) |
| 115 | { |
| 116 | #if defined(F_SETFL) && defined (FASYNC) |
| 117 | int save_fcntl_flags; |
| 118 | #endif |
| 119 | char *port_str; |
| 120 | |
| 121 | port_str = strchr (name, ':'); |
| 122 | if (port_str == NULL) |
| 123 | { |
| 124 | #ifdef USE_WIN32API |
| 125 | error ("Only <host>:<port> is supported on this platform."); |
| 126 | #else |
| 127 | struct stat statbuf; |
| 128 | |
| 129 | if (stat (name, &statbuf) == 0 |
| 130 | && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode))) |
| 131 | remote_desc = open (name, O_RDWR); |
| 132 | else |
| 133 | { |
| 134 | errno = EINVAL; |
| 135 | remote_desc = -1; |
| 136 | } |
| 137 | |
| 138 | if (remote_desc < 0) |
| 139 | perror_with_name ("Could not open remote device"); |
| 140 | |
| 141 | #ifdef HAVE_TERMIOS |
| 142 | { |
| 143 | struct termios termios; |
| 144 | tcgetattr (remote_desc, &termios); |
| 145 | |
| 146 | termios.c_iflag = 0; |
| 147 | termios.c_oflag = 0; |
| 148 | termios.c_lflag = 0; |
| 149 | termios.c_cflag &= ~(CSIZE | PARENB); |
| 150 | termios.c_cflag |= CLOCAL | CS8; |
| 151 | termios.c_cc[VMIN] = 1; |
| 152 | termios.c_cc[VTIME] = 0; |
| 153 | |
| 154 | tcsetattr (remote_desc, TCSANOW, &termios); |
| 155 | } |
| 156 | #endif |
| 157 | |
| 158 | #ifdef HAVE_TERMIO |
| 159 | { |
| 160 | struct termio termio; |
| 161 | ioctl (remote_desc, TCGETA, &termio); |
| 162 | |
| 163 | termio.c_iflag = 0; |
| 164 | termio.c_oflag = 0; |
| 165 | termio.c_lflag = 0; |
| 166 | termio.c_cflag &= ~(CSIZE | PARENB); |
| 167 | termio.c_cflag |= CLOCAL | CS8; |
| 168 | termio.c_cc[VMIN] = 1; |
| 169 | termio.c_cc[VTIME] = 0; |
| 170 | |
| 171 | ioctl (remote_desc, TCSETA, &termio); |
| 172 | } |
| 173 | #endif |
| 174 | |
| 175 | #ifdef HAVE_SGTTY |
| 176 | { |
| 177 | struct sgttyb sg; |
| 178 | |
| 179 | ioctl (remote_desc, TIOCGETP, &sg); |
| 180 | sg.sg_flags = RAW; |
| 181 | ioctl (remote_desc, TIOCSETP, &sg); |
| 182 | } |
| 183 | #endif |
| 184 | |
| 185 | fprintf (stderr, "Remote debugging using %s\n", name); |
| 186 | #endif /* USE_WIN32API */ |
| 187 | |
| 188 | transport_is_reliable = 0; |
| 189 | } |
| 190 | else |
| 191 | { |
| 192 | #ifdef USE_WIN32API |
| 193 | static int winsock_initialized; |
| 194 | #endif |
| 195 | int port; |
| 196 | struct sockaddr_in sockaddr; |
| 197 | socklen_t tmp; |
| 198 | int tmp_desc; |
| 199 | char *port_end; |
| 200 | |
| 201 | port = strtoul (port_str + 1, &port_end, 10); |
| 202 | if (port_str[1] == '\0' || *port_end != '\0') |
| 203 | fatal ("Bad port argument: %s", name); |
| 204 | |
| 205 | #ifdef USE_WIN32API |
| 206 | if (!winsock_initialized) |
| 207 | { |
| 208 | WSADATA wsad; |
| 209 | |
| 210 | WSAStartup (MAKEWORD (1, 0), &wsad); |
| 211 | winsock_initialized = 1; |
| 212 | } |
| 213 | #endif |
| 214 | |
| 215 | tmp_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 216 | if (tmp_desc < 0) |
| 217 | perror_with_name ("Can't open socket"); |
| 218 | |
| 219 | /* Allow rapid reuse of this port. */ |
| 220 | tmp = 1; |
| 221 | setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, |
| 222 | sizeof (tmp)); |
| 223 | |
| 224 | sockaddr.sin_family = PF_INET; |
| 225 | sockaddr.sin_port = htons (port); |
| 226 | sockaddr.sin_addr.s_addr = INADDR_ANY; |
| 227 | |
| 228 | if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) |
| 229 | || listen (tmp_desc, 1)) |
| 230 | perror_with_name ("Can't bind address"); |
| 231 | |
| 232 | /* If port is zero, a random port will be selected, and the |
| 233 | fprintf below needs to know what port was selected. */ |
| 234 | if (port == 0) |
| 235 | { |
| 236 | socklen_t len = sizeof (sockaddr); |
| 237 | if (getsockname (tmp_desc, (struct sockaddr *) &sockaddr, &len) < 0 |
| 238 | || len < sizeof (sockaddr)) |
| 239 | perror_with_name ("Can't determine port"); |
| 240 | port = ntohs (sockaddr.sin_port); |
| 241 | } |
| 242 | |
| 243 | fprintf (stderr, "Listening on port %d\n", port); |
| 244 | fflush (stderr); |
| 245 | |
| 246 | tmp = sizeof (sockaddr); |
| 247 | remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp); |
| 248 | if (remote_desc == -1) |
| 249 | perror_with_name ("Accept failed"); |
| 250 | |
| 251 | /* Enable TCP keep alive process. */ |
| 252 | tmp = 1; |
| 253 | setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE, |
| 254 | (char *) &tmp, sizeof (tmp)); |
| 255 | |
| 256 | /* Tell TCP not to delay small packets. This greatly speeds up |
| 257 | interactive response. */ |
| 258 | tmp = 1; |
| 259 | setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY, |
| 260 | (char *) &tmp, sizeof (tmp)); |
| 261 | |
| 262 | |
| 263 | #ifndef USE_WIN32API |
| 264 | close (tmp_desc); /* No longer need this */ |
| 265 | |
| 266 | signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply |
| 267 | exits when the remote side dies. */ |
| 268 | #else |
| 269 | closesocket (tmp_desc); /* No longer need this */ |
| 270 | #endif |
| 271 | |
| 272 | /* Convert IP address to string. */ |
| 273 | fprintf (stderr, "Remote debugging from host %s\n", |
| 274 | inet_ntoa (sockaddr.sin_addr)); |
| 275 | |
| 276 | transport_is_reliable = 1; |
| 277 | } |
| 278 | |
| 279 | #if defined(F_SETFL) && defined (FASYNC) |
| 280 | save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0); |
| 281 | fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC); |
| 282 | #if defined (F_SETOWN) |
| 283 | fcntl (remote_desc, F_SETOWN, getpid ()); |
| 284 | #endif |
| 285 | #endif |
| 286 | |
| 287 | /* Register the event loop handler. */ |
| 288 | add_file_handler (remote_desc, handle_serial_event, NULL); |
| 289 | } |
| 290 | |
| 291 | void |
| 292 | remote_close (void) |
| 293 | { |
| 294 | delete_file_handler (remote_desc); |
| 295 | |
| 296 | #ifdef USE_WIN32API |
| 297 | closesocket (remote_desc); |
| 298 | #else |
| 299 | close (remote_desc); |
| 300 | #endif |
| 301 | } |
| 302 | |
| 303 | /* Convert hex digit A to a number. */ |
| 304 | |
| 305 | static int |
| 306 | fromhex (int a) |
| 307 | { |
| 308 | if (a >= '0' && a <= '9') |
| 309 | return a - '0'; |
| 310 | else if (a >= 'a' && a <= 'f') |
| 311 | return a - 'a' + 10; |
| 312 | else |
| 313 | error ("Reply contains invalid hex digit"); |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | static const char hexchars[] = "0123456789abcdef"; |
| 318 | |
| 319 | static int |
| 320 | ishex (int ch, int *val) |
| 321 | { |
| 322 | if ((ch >= 'a') && (ch <= 'f')) |
| 323 | { |
| 324 | *val = ch - 'a' + 10; |
| 325 | return 1; |
| 326 | } |
| 327 | if ((ch >= 'A') && (ch <= 'F')) |
| 328 | { |
| 329 | *val = ch - 'A' + 10; |
| 330 | return 1; |
| 331 | } |
| 332 | if ((ch >= '0') && (ch <= '9')) |
| 333 | { |
| 334 | *val = ch - '0'; |
| 335 | return 1; |
| 336 | } |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | int |
| 341 | unhexify (char *bin, const char *hex, int count) |
| 342 | { |
| 343 | int i; |
| 344 | |
| 345 | for (i = 0; i < count; i++) |
| 346 | { |
| 347 | if (hex[0] == 0 || hex[1] == 0) |
| 348 | { |
| 349 | /* Hex string is short, or of uneven length. |
| 350 | Return the count that has been converted so far. */ |
| 351 | return i; |
| 352 | } |
| 353 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); |
| 354 | hex += 2; |
| 355 | } |
| 356 | return i; |
| 357 | } |
| 358 | |
| 359 | void |
| 360 | decode_address (CORE_ADDR *addrp, const char *start, int len) |
| 361 | { |
| 362 | CORE_ADDR addr; |
| 363 | char ch; |
| 364 | int i; |
| 365 | |
| 366 | addr = 0; |
| 367 | for (i = 0; i < len; i++) |
| 368 | { |
| 369 | ch = start[i]; |
| 370 | addr = addr << 4; |
| 371 | addr = addr | (fromhex (ch) & 0x0f); |
| 372 | } |
| 373 | *addrp = addr; |
| 374 | } |
| 375 | |
| 376 | const char * |
| 377 | decode_address_to_semicolon (CORE_ADDR *addrp, const char *start) |
| 378 | { |
| 379 | const char *end; |
| 380 | |
| 381 | end = start; |
| 382 | while (*end != '\0' && *end != ';') |
| 383 | end++; |
| 384 | |
| 385 | decode_address (addrp, start, end - start); |
| 386 | |
| 387 | if (*end == ';') |
| 388 | end++; |
| 389 | return end; |
| 390 | } |
| 391 | |
| 392 | /* Convert number NIB to a hex digit. */ |
| 393 | |
| 394 | static int |
| 395 | tohex (int nib) |
| 396 | { |
| 397 | if (nib < 10) |
| 398 | return '0' + nib; |
| 399 | else |
| 400 | return 'a' + nib - 10; |
| 401 | } |
| 402 | |
| 403 | int |
| 404 | hexify (char *hex, const char *bin, int count) |
| 405 | { |
| 406 | int i; |
| 407 | |
| 408 | /* May use a length, or a nul-terminated string as input. */ |
| 409 | if (count == 0) |
| 410 | count = strlen (bin); |
| 411 | |
| 412 | for (i = 0; i < count; i++) |
| 413 | { |
| 414 | *hex++ = tohex ((*bin >> 4) & 0xf); |
| 415 | *hex++ = tohex (*bin++ & 0xf); |
| 416 | } |
| 417 | *hex = 0; |
| 418 | return i; |
| 419 | } |
| 420 | |
| 421 | /* Convert BUFFER, binary data at least LEN bytes long, into escaped |
| 422 | binary data in OUT_BUF. Set *OUT_LEN to the length of the data |
| 423 | encoded in OUT_BUF, and return the number of bytes in OUT_BUF |
| 424 | (which may be more than *OUT_LEN due to escape characters). The |
| 425 | total number of bytes in the output buffer will be at most |
| 426 | OUT_MAXLEN. */ |
| 427 | |
| 428 | int |
| 429 | remote_escape_output (const gdb_byte *buffer, int len, |
| 430 | gdb_byte *out_buf, int *out_len, |
| 431 | int out_maxlen) |
| 432 | { |
| 433 | int input_index, output_index; |
| 434 | |
| 435 | output_index = 0; |
| 436 | for (input_index = 0; input_index < len; input_index++) |
| 437 | { |
| 438 | gdb_byte b = buffer[input_index]; |
| 439 | |
| 440 | if (b == '$' || b == '#' || b == '}' || b == '*') |
| 441 | { |
| 442 | /* These must be escaped. */ |
| 443 | if (output_index + 2 > out_maxlen) |
| 444 | break; |
| 445 | out_buf[output_index++] = '}'; |
| 446 | out_buf[output_index++] = b ^ 0x20; |
| 447 | } |
| 448 | else |
| 449 | { |
| 450 | if (output_index + 1 > out_maxlen) |
| 451 | break; |
| 452 | out_buf[output_index++] = b; |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | *out_len = input_index; |
| 457 | return output_index; |
| 458 | } |
| 459 | |
| 460 | /* Convert BUFFER, escaped data LEN bytes long, into binary data |
| 461 | in OUT_BUF. Return the number of bytes written to OUT_BUF. |
| 462 | Raise an error if the total number of bytes exceeds OUT_MAXLEN. |
| 463 | |
| 464 | This function reverses remote_escape_output. It allows more |
| 465 | escaped characters than that function does, in particular because |
| 466 | '*' must be escaped to avoid the run-length encoding processing |
| 467 | in reading packets. */ |
| 468 | |
| 469 | static int |
| 470 | remote_unescape_input (const gdb_byte *buffer, int len, |
| 471 | gdb_byte *out_buf, int out_maxlen) |
| 472 | { |
| 473 | int input_index, output_index; |
| 474 | int escaped; |
| 475 | |
| 476 | output_index = 0; |
| 477 | escaped = 0; |
| 478 | for (input_index = 0; input_index < len; input_index++) |
| 479 | { |
| 480 | gdb_byte b = buffer[input_index]; |
| 481 | |
| 482 | if (output_index + 1 > out_maxlen) |
| 483 | error ("Received too much data from the target."); |
| 484 | |
| 485 | if (escaped) |
| 486 | { |
| 487 | out_buf[output_index++] = b ^ 0x20; |
| 488 | escaped = 0; |
| 489 | } |
| 490 | else if (b == '}') |
| 491 | escaped = 1; |
| 492 | else |
| 493 | out_buf[output_index++] = b; |
| 494 | } |
| 495 | |
| 496 | if (escaped) |
| 497 | error ("Unmatched escape character in target response."); |
| 498 | |
| 499 | return output_index; |
| 500 | } |
| 501 | |
| 502 | /* Look for a sequence of characters which can be run-length encoded. |
| 503 | If there are any, update *CSUM and *P. Otherwise, output the |
| 504 | single character. Return the number of characters consumed. */ |
| 505 | |
| 506 | static int |
| 507 | try_rle (char *buf, int remaining, unsigned char *csum, char **p) |
| 508 | { |
| 509 | int n; |
| 510 | |
| 511 | /* Always output the character. */ |
| 512 | *csum += buf[0]; |
| 513 | *(*p)++ = buf[0]; |
| 514 | |
| 515 | /* Don't go past '~'. */ |
| 516 | if (remaining > 97) |
| 517 | remaining = 97; |
| 518 | |
| 519 | for (n = 1; n < remaining; n++) |
| 520 | if (buf[n] != buf[0]) |
| 521 | break; |
| 522 | |
| 523 | /* N is the index of the first character not the same as buf[0]. |
| 524 | buf[0] is counted twice, so by decrementing N, we get the number |
| 525 | of characters the RLE sequence will replace. */ |
| 526 | n--; |
| 527 | |
| 528 | if (n < 3) |
| 529 | return 1; |
| 530 | |
| 531 | /* Skip the frame characters. The manual says to skip '+' and '-' |
| 532 | also, but there's no reason to. Unfortunately these two unusable |
| 533 | characters double the encoded length of a four byte zero |
| 534 | value. */ |
| 535 | while (n + 29 == '$' || n + 29 == '#') |
| 536 | n--; |
| 537 | |
| 538 | *csum += '*'; |
| 539 | *(*p)++ = '*'; |
| 540 | *csum += n + 29; |
| 541 | *(*p)++ = n + 29; |
| 542 | |
| 543 | return n + 1; |
| 544 | } |
| 545 | |
| 546 | char * |
| 547 | unpack_varlen_hex (char *buff, /* packet to parse */ |
| 548 | ULONGEST *result) |
| 549 | { |
| 550 | int nibble; |
| 551 | ULONGEST retval = 0; |
| 552 | |
| 553 | while (ishex (*buff, &nibble)) |
| 554 | { |
| 555 | buff++; |
| 556 | retval = retval << 4; |
| 557 | retval |= nibble & 0x0f; |
| 558 | } |
| 559 | *result = retval; |
| 560 | return buff; |
| 561 | } |
| 562 | |
| 563 | /* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */ |
| 564 | |
| 565 | char * |
| 566 | write_ptid (char *buf, ptid_t ptid) |
| 567 | { |
| 568 | int pid, tid; |
| 569 | |
| 570 | if (multi_process) |
| 571 | { |
| 572 | pid = ptid_get_pid (ptid); |
| 573 | if (pid < 0) |
| 574 | buf += sprintf (buf, "p-%x.", -pid); |
| 575 | else |
| 576 | buf += sprintf (buf, "p%x.", pid); |
| 577 | } |
| 578 | tid = ptid_get_lwp (ptid); |
| 579 | if (tid < 0) |
| 580 | buf += sprintf (buf, "-%x", -tid); |
| 581 | else |
| 582 | buf += sprintf (buf, "%x", tid); |
| 583 | |
| 584 | return buf; |
| 585 | } |
| 586 | |
| 587 | ULONGEST |
| 588 | hex_or_minus_one (char *buf, char **obuf) |
| 589 | { |
| 590 | ULONGEST ret; |
| 591 | |
| 592 | if (strncmp (buf, "-1", 2) == 0) |
| 593 | { |
| 594 | ret = (ULONGEST) -1; |
| 595 | buf += 2; |
| 596 | } |
| 597 | else |
| 598 | buf = unpack_varlen_hex (buf, &ret); |
| 599 | |
| 600 | if (obuf) |
| 601 | *obuf = buf; |
| 602 | |
| 603 | return ret; |
| 604 | } |
| 605 | |
| 606 | /* Extract a PTID from BUF. If non-null, OBUF is set to the to one |
| 607 | passed the last parsed char. Returns null_ptid on error. */ |
| 608 | ptid_t |
| 609 | read_ptid (char *buf, char **obuf) |
| 610 | { |
| 611 | char *p = buf; |
| 612 | char *pp; |
| 613 | ULONGEST pid = 0, tid = 0; |
| 614 | |
| 615 | if (*p == 'p') |
| 616 | { |
| 617 | /* Multi-process ptid. */ |
| 618 | pp = unpack_varlen_hex (p + 1, &pid); |
| 619 | if (*pp != '.') |
| 620 | error ("invalid remote ptid: %s\n", p); |
| 621 | |
| 622 | p = pp + 1; |
| 623 | |
| 624 | tid = hex_or_minus_one (p, &pp); |
| 625 | |
| 626 | if (obuf) |
| 627 | *obuf = pp; |
| 628 | return ptid_build (pid, tid, 0); |
| 629 | } |
| 630 | |
| 631 | /* No multi-process. Just a tid. */ |
| 632 | tid = hex_or_minus_one (p, &pp); |
| 633 | |
| 634 | /* Since the stub is not sending a process id, then default to |
| 635 | what's in the current inferior. */ |
| 636 | pid = ptid_get_pid (((struct inferior_list_entry *) current_inferior)->id); |
| 637 | |
| 638 | if (obuf) |
| 639 | *obuf = pp; |
| 640 | return ptid_build (pid, tid, 0); |
| 641 | } |
| 642 | |
| 643 | /* Send a packet to the remote machine, with error checking. |
| 644 | The data of the packet is in BUF, and the length of the |
| 645 | packet is in CNT. Returns >= 0 on success, -1 otherwise. */ |
| 646 | |
| 647 | static int |
| 648 | putpkt_binary_1 (char *buf, int cnt, int is_notif) |
| 649 | { |
| 650 | int i; |
| 651 | unsigned char csum = 0; |
| 652 | char *buf2; |
| 653 | char buf3[1]; |
| 654 | char *p; |
| 655 | |
| 656 | buf2 = xmalloc (PBUFSIZ); |
| 657 | |
| 658 | /* Copy the packet into buffer BUF2, encapsulating it |
| 659 | and giving it a checksum. */ |
| 660 | |
| 661 | p = buf2; |
| 662 | if (is_notif) |
| 663 | *p++ = '%'; |
| 664 | else |
| 665 | *p++ = '$'; |
| 666 | |
| 667 | for (i = 0; i < cnt;) |
| 668 | i += try_rle (buf + i, cnt - i, &csum, &p); |
| 669 | |
| 670 | *p++ = '#'; |
| 671 | *p++ = tohex ((csum >> 4) & 0xf); |
| 672 | *p++ = tohex (csum & 0xf); |
| 673 | |
| 674 | *p = '\0'; |
| 675 | |
| 676 | /* Send it over and over until we get a positive ack. */ |
| 677 | |
| 678 | do |
| 679 | { |
| 680 | int cc; |
| 681 | |
| 682 | if (write (remote_desc, buf2, p - buf2) != p - buf2) |
| 683 | { |
| 684 | perror ("putpkt(write)"); |
| 685 | free (buf2); |
| 686 | return -1; |
| 687 | } |
| 688 | |
| 689 | if (noack_mode || is_notif) |
| 690 | { |
| 691 | /* Don't expect an ack then. */ |
| 692 | if (remote_debug) |
| 693 | { |
| 694 | if (is_notif) |
| 695 | fprintf (stderr, "putpkt (\"%s\"); [notif]\n", buf2); |
| 696 | else |
| 697 | fprintf (stderr, "putpkt (\"%s\"); [noack mode]\n", buf2); |
| 698 | fflush (stderr); |
| 699 | } |
| 700 | break; |
| 701 | } |
| 702 | |
| 703 | if (remote_debug) |
| 704 | { |
| 705 | fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2); |
| 706 | fflush (stderr); |
| 707 | } |
| 708 | cc = read (remote_desc, buf3, 1); |
| 709 | if (remote_debug) |
| 710 | { |
| 711 | fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]); |
| 712 | fflush (stderr); |
| 713 | } |
| 714 | |
| 715 | if (cc <= 0) |
| 716 | { |
| 717 | if (cc == 0) |
| 718 | fprintf (stderr, "putpkt(read): Got EOF\n"); |
| 719 | else |
| 720 | perror ("putpkt(read)"); |
| 721 | |
| 722 | free (buf2); |
| 723 | return -1; |
| 724 | } |
| 725 | |
| 726 | /* Check for an input interrupt while we're here. */ |
| 727 | if (buf3[0] == '\003' && current_inferior != NULL) |
| 728 | (*the_target->request_interrupt) (); |
| 729 | } |
| 730 | while (buf3[0] != '+'); |
| 731 | |
| 732 | free (buf2); |
| 733 | return 1; /* Success! */ |
| 734 | } |
| 735 | |
| 736 | int |
| 737 | putpkt_binary (char *buf, int cnt) |
| 738 | { |
| 739 | return putpkt_binary_1 (buf, cnt, 0); |
| 740 | } |
| 741 | |
| 742 | /* Send a packet to the remote machine, with error checking. The data |
| 743 | of the packet is in BUF, and the packet should be a NUL-terminated |
| 744 | string. Returns >= 0 on success, -1 otherwise. */ |
| 745 | |
| 746 | int |
| 747 | putpkt (char *buf) |
| 748 | { |
| 749 | return putpkt_binary (buf, strlen (buf)); |
| 750 | } |
| 751 | |
| 752 | int |
| 753 | putpkt_notif (char *buf) |
| 754 | { |
| 755 | return putpkt_binary_1 (buf, strlen (buf), 1); |
| 756 | } |
| 757 | |
| 758 | /* Come here when we get an input interrupt from the remote side. This |
| 759 | interrupt should only be active while we are waiting for the child to do |
| 760 | something. About the only thing that should come through is a ^C, which |
| 761 | will cause us to request child interruption. */ |
| 762 | |
| 763 | static void |
| 764 | input_interrupt (int unused) |
| 765 | { |
| 766 | fd_set readset; |
| 767 | struct timeval immediate = { 0, 0 }; |
| 768 | |
| 769 | /* Protect against spurious interrupts. This has been observed to |
| 770 | be a problem under NetBSD 1.4 and 1.5. */ |
| 771 | |
| 772 | FD_ZERO (&readset); |
| 773 | FD_SET (remote_desc, &readset); |
| 774 | if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0) |
| 775 | { |
| 776 | int cc; |
| 777 | char c = 0; |
| 778 | |
| 779 | cc = read (remote_desc, &c, 1); |
| 780 | |
| 781 | if (cc != 1 || c != '\003' || current_inferior == NULL) |
| 782 | { |
| 783 | fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n", |
| 784 | cc, c, c); |
| 785 | return; |
| 786 | } |
| 787 | |
| 788 | (*the_target->request_interrupt) (); |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | /* Check if the remote side sent us an interrupt request (^C). */ |
| 793 | void |
| 794 | check_remote_input_interrupt_request (void) |
| 795 | { |
| 796 | /* This function may be called before establishing communications, |
| 797 | therefore we need to validate the remote descriptor. */ |
| 798 | |
| 799 | if (remote_desc == INVALID_DESCRIPTOR) |
| 800 | return; |
| 801 | |
| 802 | input_interrupt (0); |
| 803 | } |
| 804 | |
| 805 | /* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to |
| 806 | accept Control-C from the client, and must be disabled when talking to |
| 807 | the client. */ |
| 808 | |
| 809 | static void |
| 810 | unblock_async_io (void) |
| 811 | { |
| 812 | #ifndef USE_WIN32API |
| 813 | sigset_t sigio_set; |
| 814 | |
| 815 | sigemptyset (&sigio_set); |
| 816 | sigaddset (&sigio_set, SIGIO); |
| 817 | sigprocmask (SIG_UNBLOCK, &sigio_set, NULL); |
| 818 | #endif |
| 819 | } |
| 820 | |
| 821 | #ifdef __QNX__ |
| 822 | static void |
| 823 | nto_comctrl (int enable) |
| 824 | { |
| 825 | struct sigevent event; |
| 826 | |
| 827 | if (enable) |
| 828 | { |
| 829 | event.sigev_notify = SIGEV_SIGNAL_THREAD; |
| 830 | event.sigev_signo = SIGIO; |
| 831 | event.sigev_code = 0; |
| 832 | event.sigev_value.sival_ptr = NULL; |
| 833 | event.sigev_priority = -1; |
| 834 | ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT, |
| 835 | &event); |
| 836 | } |
| 837 | else |
| 838 | ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL); |
| 839 | } |
| 840 | #endif /* __QNX__ */ |
| 841 | |
| 842 | |
| 843 | /* Current state of asynchronous I/O. */ |
| 844 | static int async_io_enabled; |
| 845 | |
| 846 | /* Enable asynchronous I/O. */ |
| 847 | void |
| 848 | enable_async_io (void) |
| 849 | { |
| 850 | if (async_io_enabled) |
| 851 | return; |
| 852 | |
| 853 | #ifndef USE_WIN32API |
| 854 | signal (SIGIO, input_interrupt); |
| 855 | #endif |
| 856 | async_io_enabled = 1; |
| 857 | #ifdef __QNX__ |
| 858 | nto_comctrl (1); |
| 859 | #endif /* __QNX__ */ |
| 860 | } |
| 861 | |
| 862 | /* Disable asynchronous I/O. */ |
| 863 | void |
| 864 | disable_async_io (void) |
| 865 | { |
| 866 | if (!async_io_enabled) |
| 867 | return; |
| 868 | |
| 869 | #ifndef USE_WIN32API |
| 870 | signal (SIGIO, SIG_IGN); |
| 871 | #endif |
| 872 | async_io_enabled = 0; |
| 873 | #ifdef __QNX__ |
| 874 | nto_comctrl (0); |
| 875 | #endif /* __QNX__ */ |
| 876 | |
| 877 | } |
| 878 | |
| 879 | void |
| 880 | initialize_async_io (void) |
| 881 | { |
| 882 | /* Make sure that async I/O starts disabled. */ |
| 883 | async_io_enabled = 1; |
| 884 | disable_async_io (); |
| 885 | |
| 886 | /* Make sure the signal is unblocked. */ |
| 887 | unblock_async_io (); |
| 888 | } |
| 889 | |
| 890 | /* Returns next char from remote GDB. -1 if error. */ |
| 891 | |
| 892 | static int |
| 893 | readchar (void) |
| 894 | { |
| 895 | static unsigned char buf[BUFSIZ]; |
| 896 | static int bufcnt = 0; |
| 897 | static unsigned char *bufp; |
| 898 | |
| 899 | if (bufcnt-- > 0) |
| 900 | return *bufp++; |
| 901 | |
| 902 | bufcnt = read (remote_desc, buf, sizeof (buf)); |
| 903 | |
| 904 | if (bufcnt <= 0) |
| 905 | { |
| 906 | if (bufcnt == 0) |
| 907 | fprintf (stderr, "readchar: Got EOF\n"); |
| 908 | else |
| 909 | perror ("readchar"); |
| 910 | |
| 911 | return -1; |
| 912 | } |
| 913 | |
| 914 | bufp = buf; |
| 915 | bufcnt--; |
| 916 | return *bufp++; |
| 917 | } |
| 918 | |
| 919 | /* Read a packet from the remote machine, with error checking, |
| 920 | and store it in BUF. Returns length of packet, or negative if error. */ |
| 921 | |
| 922 | int |
| 923 | getpkt (char *buf) |
| 924 | { |
| 925 | char *bp; |
| 926 | unsigned char csum, c1, c2; |
| 927 | int c; |
| 928 | |
| 929 | while (1) |
| 930 | { |
| 931 | csum = 0; |
| 932 | |
| 933 | while (1) |
| 934 | { |
| 935 | c = readchar (); |
| 936 | if (c == '$') |
| 937 | break; |
| 938 | if (remote_debug) |
| 939 | { |
| 940 | fprintf (stderr, "[getpkt: discarding char '%c']\n", c); |
| 941 | fflush (stderr); |
| 942 | } |
| 943 | |
| 944 | if (c < 0) |
| 945 | return -1; |
| 946 | } |
| 947 | |
| 948 | bp = buf; |
| 949 | while (1) |
| 950 | { |
| 951 | c = readchar (); |
| 952 | if (c < 0) |
| 953 | return -1; |
| 954 | if (c == '#') |
| 955 | break; |
| 956 | *bp++ = c; |
| 957 | csum += c; |
| 958 | } |
| 959 | *bp = 0; |
| 960 | |
| 961 | c1 = fromhex (readchar ()); |
| 962 | c2 = fromhex (readchar ()); |
| 963 | |
| 964 | if (csum == (c1 << 4) + c2) |
| 965 | break; |
| 966 | |
| 967 | if (noack_mode) |
| 968 | { |
| 969 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s [no-ack-mode, Bad medium?]\n", |
| 970 | (c1 << 4) + c2, csum, buf); |
| 971 | /* Not much we can do, GDB wasn't expecting an ack/nac. */ |
| 972 | break; |
| 973 | } |
| 974 | |
| 975 | fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n", |
| 976 | (c1 << 4) + c2, csum, buf); |
| 977 | write (remote_desc, "-", 1); |
| 978 | } |
| 979 | |
| 980 | if (!noack_mode) |
| 981 | { |
| 982 | if (remote_debug) |
| 983 | { |
| 984 | fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf); |
| 985 | fflush (stderr); |
| 986 | } |
| 987 | |
| 988 | write (remote_desc, "+", 1); |
| 989 | |
| 990 | if (remote_debug) |
| 991 | { |
| 992 | fprintf (stderr, "[sent ack]\n"); |
| 993 | fflush (stderr); |
| 994 | } |
| 995 | } |
| 996 | else |
| 997 | { |
| 998 | if (remote_debug) |
| 999 | { |
| 1000 | fprintf (stderr, "getpkt (\"%s\"); [no ack sent] \n", buf); |
| 1001 | fflush (stderr); |
| 1002 | } |
| 1003 | } |
| 1004 | |
| 1005 | return bp - buf; |
| 1006 | } |
| 1007 | |
| 1008 | void |
| 1009 | write_ok (char *buf) |
| 1010 | { |
| 1011 | buf[0] = 'O'; |
| 1012 | buf[1] = 'K'; |
| 1013 | buf[2] = '\0'; |
| 1014 | } |
| 1015 | |
| 1016 | void |
| 1017 | write_enn (char *buf) |
| 1018 | { |
| 1019 | /* Some day, we should define the meanings of the error codes... */ |
| 1020 | buf[0] = 'E'; |
| 1021 | buf[1] = '0'; |
| 1022 | buf[2] = '1'; |
| 1023 | buf[3] = '\0'; |
| 1024 | } |
| 1025 | |
| 1026 | void |
| 1027 | convert_int_to_ascii (unsigned char *from, char *to, int n) |
| 1028 | { |
| 1029 | int nib; |
| 1030 | int ch; |
| 1031 | while (n--) |
| 1032 | { |
| 1033 | ch = *from++; |
| 1034 | nib = ((ch & 0xf0) >> 4) & 0x0f; |
| 1035 | *to++ = tohex (nib); |
| 1036 | nib = ch & 0x0f; |
| 1037 | *to++ = tohex (nib); |
| 1038 | } |
| 1039 | *to++ = 0; |
| 1040 | } |
| 1041 | |
| 1042 | |
| 1043 | void |
| 1044 | convert_ascii_to_int (char *from, unsigned char *to, int n) |
| 1045 | { |
| 1046 | int nib1, nib2; |
| 1047 | while (n--) |
| 1048 | { |
| 1049 | nib1 = fromhex (*from++); |
| 1050 | nib2 = fromhex (*from++); |
| 1051 | *to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f); |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | static char * |
| 1056 | outreg (int regno, char *buf) |
| 1057 | { |
| 1058 | if ((regno >> 12) != 0) |
| 1059 | *buf++ = tohex ((regno >> 12) & 0xf); |
| 1060 | if ((regno >> 8) != 0) |
| 1061 | *buf++ = tohex ((regno >> 8) & 0xf); |
| 1062 | *buf++ = tohex ((regno >> 4) & 0xf); |
| 1063 | *buf++ = tohex (regno & 0xf); |
| 1064 | *buf++ = ':'; |
| 1065 | collect_register_as_string (regno, buf); |
| 1066 | buf += 2 * register_size (regno); |
| 1067 | *buf++ = ';'; |
| 1068 | |
| 1069 | return buf; |
| 1070 | } |
| 1071 | |
| 1072 | void |
| 1073 | new_thread_notify (int id) |
| 1074 | { |
| 1075 | char own_buf[256]; |
| 1076 | |
| 1077 | /* The `n' response is not yet part of the remote protocol. Do nothing. */ |
| 1078 | if (1) |
| 1079 | return; |
| 1080 | |
| 1081 | if (server_waiting == 0) |
| 1082 | return; |
| 1083 | |
| 1084 | sprintf (own_buf, "n%x", id); |
| 1085 | disable_async_io (); |
| 1086 | putpkt (own_buf); |
| 1087 | enable_async_io (); |
| 1088 | } |
| 1089 | |
| 1090 | void |
| 1091 | dead_thread_notify (int id) |
| 1092 | { |
| 1093 | char own_buf[256]; |
| 1094 | |
| 1095 | /* The `x' response is not yet part of the remote protocol. Do nothing. */ |
| 1096 | if (1) |
| 1097 | return; |
| 1098 | |
| 1099 | sprintf (own_buf, "x%x", id); |
| 1100 | disable_async_io (); |
| 1101 | putpkt (own_buf); |
| 1102 | enable_async_io (); |
| 1103 | } |
| 1104 | |
| 1105 | void |
| 1106 | prepare_resume_reply (char *buf, ptid_t ptid, |
| 1107 | struct target_waitstatus *status) |
| 1108 | { |
| 1109 | if (debug_threads) |
| 1110 | fprintf (stderr, "Writing resume reply for %s:%d\n\n", |
| 1111 | target_pid_to_str (ptid), status->kind); |
| 1112 | |
| 1113 | switch (status->kind) |
| 1114 | { |
| 1115 | case TARGET_WAITKIND_STOPPED: |
| 1116 | { |
| 1117 | struct thread_info *saved_inferior; |
| 1118 | const char **regp; |
| 1119 | |
| 1120 | sprintf (buf, "T%02x", status->value.sig); |
| 1121 | buf += strlen (buf); |
| 1122 | |
| 1123 | regp = gdbserver_expedite_regs; |
| 1124 | |
| 1125 | saved_inferior = current_inferior; |
| 1126 | |
| 1127 | current_inferior = find_thread_ptid (ptid); |
| 1128 | |
| 1129 | if (the_target->stopped_by_watchpoint != NULL |
| 1130 | && (*the_target->stopped_by_watchpoint) ()) |
| 1131 | { |
| 1132 | CORE_ADDR addr; |
| 1133 | int i; |
| 1134 | |
| 1135 | strncpy (buf, "watch:", 6); |
| 1136 | buf += 6; |
| 1137 | |
| 1138 | addr = (*the_target->stopped_data_address) (); |
| 1139 | |
| 1140 | /* Convert each byte of the address into two hexadecimal |
| 1141 | chars. Note that we take sizeof (void *) instead of |
| 1142 | sizeof (addr); this is to avoid sending a 64-bit |
| 1143 | address to a 32-bit GDB. */ |
| 1144 | for (i = sizeof (void *) * 2; i > 0; i--) |
| 1145 | *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf); |
| 1146 | *buf++ = ';'; |
| 1147 | } |
| 1148 | |
| 1149 | while (*regp) |
| 1150 | { |
| 1151 | buf = outreg (find_regno (*regp), buf); |
| 1152 | regp ++; |
| 1153 | } |
| 1154 | *buf = '\0'; |
| 1155 | |
| 1156 | /* Formerly, if the debugger had not used any thread features |
| 1157 | we would not burden it with a thread status response. This |
| 1158 | was for the benefit of GDB 4.13 and older. However, in |
| 1159 | recent GDB versions the check (``if (cont_thread != 0)'') |
| 1160 | does not have the desired effect because of sillyness in |
| 1161 | the way that the remote protocol handles specifying a |
| 1162 | thread. Since thread support relies on qSymbol support |
| 1163 | anyway, assume GDB can handle threads. */ |
| 1164 | |
| 1165 | if (using_threads && !disable_packet_Tthread) |
| 1166 | { |
| 1167 | /* This if (1) ought to be unnecessary. But remote_wait |
| 1168 | in GDB will claim this event belongs to inferior_ptid |
| 1169 | if we do not specify a thread, and there's no way for |
| 1170 | gdbserver to know what inferior_ptid is. */ |
| 1171 | if (1 || !ptid_equal (general_thread, ptid)) |
| 1172 | { |
| 1173 | /* In non-stop, don't change the general thread behind |
| 1174 | GDB's back. */ |
| 1175 | if (!non_stop) |
| 1176 | general_thread = ptid; |
| 1177 | sprintf (buf, "thread:"); |
| 1178 | buf += strlen (buf); |
| 1179 | buf = write_ptid (buf, ptid); |
| 1180 | strcat (buf, ";"); |
| 1181 | buf += strlen (buf); |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | if (dlls_changed) |
| 1186 | { |
| 1187 | strcpy (buf, "library:;"); |
| 1188 | buf += strlen (buf); |
| 1189 | dlls_changed = 0; |
| 1190 | } |
| 1191 | |
| 1192 | current_inferior = saved_inferior; |
| 1193 | } |
| 1194 | break; |
| 1195 | case TARGET_WAITKIND_EXITED: |
| 1196 | if (multi_process) |
| 1197 | sprintf (buf, "W%x;process:%x", |
| 1198 | status->value.integer, ptid_get_pid (ptid)); |
| 1199 | else |
| 1200 | sprintf (buf, "W%02x", status->value.integer); |
| 1201 | break; |
| 1202 | case TARGET_WAITKIND_SIGNALLED: |
| 1203 | if (multi_process) |
| 1204 | sprintf (buf, "X%x;process:%x", |
| 1205 | status->value.sig, ptid_get_pid (ptid)); |
| 1206 | else |
| 1207 | sprintf (buf, "X%02x", status->value.sig); |
| 1208 | break; |
| 1209 | default: |
| 1210 | error ("unhandled waitkind"); |
| 1211 | break; |
| 1212 | } |
| 1213 | } |
| 1214 | |
| 1215 | void |
| 1216 | decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr) |
| 1217 | { |
| 1218 | int i = 0, j = 0; |
| 1219 | char ch; |
| 1220 | *mem_addr_ptr = *len_ptr = 0; |
| 1221 | |
| 1222 | while ((ch = from[i++]) != ',') |
| 1223 | { |
| 1224 | *mem_addr_ptr = *mem_addr_ptr << 4; |
| 1225 | *mem_addr_ptr |= fromhex (ch) & 0x0f; |
| 1226 | } |
| 1227 | |
| 1228 | for (j = 0; j < 4; j++) |
| 1229 | { |
| 1230 | if ((ch = from[i++]) == 0) |
| 1231 | break; |
| 1232 | *len_ptr = *len_ptr << 4; |
| 1233 | *len_ptr |= fromhex (ch) & 0x0f; |
| 1234 | } |
| 1235 | } |
| 1236 | |
| 1237 | void |
| 1238 | decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr, |
| 1239 | unsigned char *to) |
| 1240 | { |
| 1241 | int i = 0; |
| 1242 | char ch; |
| 1243 | *mem_addr_ptr = *len_ptr = 0; |
| 1244 | |
| 1245 | while ((ch = from[i++]) != ',') |
| 1246 | { |
| 1247 | *mem_addr_ptr = *mem_addr_ptr << 4; |
| 1248 | *mem_addr_ptr |= fromhex (ch) & 0x0f; |
| 1249 | } |
| 1250 | |
| 1251 | while ((ch = from[i++]) != ':') |
| 1252 | { |
| 1253 | *len_ptr = *len_ptr << 4; |
| 1254 | *len_ptr |= fromhex (ch) & 0x0f; |
| 1255 | } |
| 1256 | |
| 1257 | convert_ascii_to_int (&from[i++], to, *len_ptr); |
| 1258 | } |
| 1259 | |
| 1260 | int |
| 1261 | decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr, |
| 1262 | unsigned int *len_ptr, unsigned char *to) |
| 1263 | { |
| 1264 | int i = 0; |
| 1265 | char ch; |
| 1266 | *mem_addr_ptr = *len_ptr = 0; |
| 1267 | |
| 1268 | while ((ch = from[i++]) != ',') |
| 1269 | { |
| 1270 | *mem_addr_ptr = *mem_addr_ptr << 4; |
| 1271 | *mem_addr_ptr |= fromhex (ch) & 0x0f; |
| 1272 | } |
| 1273 | |
| 1274 | while ((ch = from[i++]) != ':') |
| 1275 | { |
| 1276 | *len_ptr = *len_ptr << 4; |
| 1277 | *len_ptr |= fromhex (ch) & 0x0f; |
| 1278 | } |
| 1279 | |
| 1280 | if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i, |
| 1281 | to, *len_ptr) != *len_ptr) |
| 1282 | return -1; |
| 1283 | |
| 1284 | return 0; |
| 1285 | } |
| 1286 | |
| 1287 | /* Decode a qXfer write request. */ |
| 1288 | int |
| 1289 | decode_xfer_write (char *buf, int packet_len, char **annex, CORE_ADDR *offset, |
| 1290 | unsigned int *len, unsigned char *data) |
| 1291 | { |
| 1292 | char ch; |
| 1293 | |
| 1294 | /* Extract and NUL-terminate the annex. */ |
| 1295 | *annex = buf; |
| 1296 | while (*buf && *buf != ':') |
| 1297 | buf++; |
| 1298 | if (*buf == '\0') |
| 1299 | return -1; |
| 1300 | *buf++ = 0; |
| 1301 | |
| 1302 | /* Extract the offset. */ |
| 1303 | *offset = 0; |
| 1304 | while ((ch = *buf++) != ':') |
| 1305 | { |
| 1306 | *offset = *offset << 4; |
| 1307 | *offset |= fromhex (ch) & 0x0f; |
| 1308 | } |
| 1309 | |
| 1310 | /* Get encoded data. */ |
| 1311 | packet_len -= buf - *annex; |
| 1312 | *len = remote_unescape_input ((const gdb_byte *) buf, packet_len, |
| 1313 | data, packet_len); |
| 1314 | return 0; |
| 1315 | } |
| 1316 | |
| 1317 | /* Decode the parameters of a qSearch:memory packet. */ |
| 1318 | |
| 1319 | int |
| 1320 | decode_search_memory_packet (const char *buf, int packet_len, |
| 1321 | CORE_ADDR *start_addrp, |
| 1322 | CORE_ADDR *search_space_lenp, |
| 1323 | gdb_byte *pattern, unsigned int *pattern_lenp) |
| 1324 | { |
| 1325 | const char *p = buf; |
| 1326 | |
| 1327 | p = decode_address_to_semicolon (start_addrp, p); |
| 1328 | p = decode_address_to_semicolon (search_space_lenp, p); |
| 1329 | packet_len -= p - buf; |
| 1330 | *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len, |
| 1331 | pattern, packet_len); |
| 1332 | return 0; |
| 1333 | } |
| 1334 | |
| 1335 | static void |
| 1336 | free_sym_cache (struct sym_cache *sym) |
| 1337 | { |
| 1338 | if (sym != NULL) |
| 1339 | { |
| 1340 | free (sym->name); |
| 1341 | free (sym); |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | void |
| 1346 | clear_symbol_cache (struct sym_cache **symcache_p) |
| 1347 | { |
| 1348 | struct sym_cache *sym, *next; |
| 1349 | |
| 1350 | /* Check the cache first. */ |
| 1351 | for (sym = *symcache_p; sym; sym = next) |
| 1352 | { |
| 1353 | next = sym->next; |
| 1354 | free_sym_cache (sym); |
| 1355 | } |
| 1356 | |
| 1357 | *symcache_p = NULL; |
| 1358 | } |
| 1359 | |
| 1360 | /* Ask GDB for the address of NAME, and return it in ADDRP if found. |
| 1361 | Returns 1 if the symbol is found, 0 if it is not, -1 on error. */ |
| 1362 | |
| 1363 | int |
| 1364 | look_up_one_symbol (const char *name, CORE_ADDR *addrp) |
| 1365 | { |
| 1366 | char own_buf[266], *p, *q; |
| 1367 | int len; |
| 1368 | struct sym_cache *sym; |
| 1369 | struct process_info *proc; |
| 1370 | |
| 1371 | proc = current_process (); |
| 1372 | |
| 1373 | /* Check the cache first. */ |
| 1374 | for (sym = proc->symbol_cache; sym; sym = sym->next) |
| 1375 | if (strcmp (name, sym->name) == 0) |
| 1376 | { |
| 1377 | *addrp = sym->addr; |
| 1378 | return 1; |
| 1379 | } |
| 1380 | |
| 1381 | /* If we've passed the call to thread_db_look_up_symbols, then |
| 1382 | anything not in the cache must not exist; we're not interested |
| 1383 | in any libraries loaded after that point, only in symbols in |
| 1384 | libpthread.so. It might not be an appropriate time to look |
| 1385 | up a symbol, e.g. while we're trying to fetch registers. */ |
| 1386 | if (proc->all_symbols_looked_up) |
| 1387 | return 0; |
| 1388 | |
| 1389 | /* Send the request. */ |
| 1390 | strcpy (own_buf, "qSymbol:"); |
| 1391 | hexify (own_buf + strlen ("qSymbol:"), name, strlen (name)); |
| 1392 | if (putpkt (own_buf) < 0) |
| 1393 | return -1; |
| 1394 | |
| 1395 | /* FIXME: Eventually add buffer overflow checking (to getpkt?) */ |
| 1396 | len = getpkt (own_buf); |
| 1397 | if (len < 0) |
| 1398 | return -1; |
| 1399 | |
| 1400 | /* We ought to handle pretty much any packet at this point while we |
| 1401 | wait for the qSymbol "response". That requires re-entering the |
| 1402 | main loop. For now, this is an adequate approximation; allow |
| 1403 | GDB to read from memory while it figures out the address of the |
| 1404 | symbol. */ |
| 1405 | while (own_buf[0] == 'm') |
| 1406 | { |
| 1407 | CORE_ADDR mem_addr; |
| 1408 | unsigned char *mem_buf; |
| 1409 | unsigned int mem_len; |
| 1410 | |
| 1411 | decode_m_packet (&own_buf[1], &mem_addr, &mem_len); |
| 1412 | mem_buf = xmalloc (mem_len); |
| 1413 | if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0) |
| 1414 | convert_int_to_ascii (mem_buf, own_buf, mem_len); |
| 1415 | else |
| 1416 | write_enn (own_buf); |
| 1417 | free (mem_buf); |
| 1418 | if (putpkt (own_buf) < 0) |
| 1419 | return -1; |
| 1420 | len = getpkt (own_buf); |
| 1421 | if (len < 0) |
| 1422 | return -1; |
| 1423 | } |
| 1424 | |
| 1425 | if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0) |
| 1426 | { |
| 1427 | warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf); |
| 1428 | return -1; |
| 1429 | } |
| 1430 | |
| 1431 | p = own_buf + strlen ("qSymbol:"); |
| 1432 | q = p; |
| 1433 | while (*q && *q != ':') |
| 1434 | q++; |
| 1435 | |
| 1436 | /* Make sure we found a value for the symbol. */ |
| 1437 | if (p == q || *q == '\0') |
| 1438 | return 0; |
| 1439 | |
| 1440 | decode_address (addrp, p, q - p); |
| 1441 | |
| 1442 | /* Save the symbol in our cache. */ |
| 1443 | sym = xmalloc (sizeof (*sym)); |
| 1444 | sym->name = xstrdup (name); |
| 1445 | sym->addr = *addrp; |
| 1446 | sym->next = proc->symbol_cache; |
| 1447 | proc->symbol_cache = sym; |
| 1448 | |
| 1449 | return 1; |
| 1450 | } |
| 1451 | |
| 1452 | void |
| 1453 | monitor_output (const char *msg) |
| 1454 | { |
| 1455 | char *buf = xmalloc (strlen (msg) * 2 + 2); |
| 1456 | |
| 1457 | buf[0] = 'O'; |
| 1458 | hexify (buf + 1, msg, 0); |
| 1459 | |
| 1460 | putpkt (buf); |
| 1461 | free (buf); |
| 1462 | } |
| 1463 | |
| 1464 | /* Return a malloc allocated string with special characters from TEXT |
| 1465 | replaced by entity references. */ |
| 1466 | |
| 1467 | char * |
| 1468 | xml_escape_text (const char *text) |
| 1469 | { |
| 1470 | char *result; |
| 1471 | int i, special; |
| 1472 | |
| 1473 | /* Compute the length of the result. */ |
| 1474 | for (i = 0, special = 0; text[i] != '\0'; i++) |
| 1475 | switch (text[i]) |
| 1476 | { |
| 1477 | case '\'': |
| 1478 | case '\"': |
| 1479 | special += 5; |
| 1480 | break; |
| 1481 | case '&': |
| 1482 | special += 4; |
| 1483 | break; |
| 1484 | case '<': |
| 1485 | case '>': |
| 1486 | special += 3; |
| 1487 | break; |
| 1488 | default: |
| 1489 | break; |
| 1490 | } |
| 1491 | |
| 1492 | /* Expand the result. */ |
| 1493 | result = xmalloc (i + special + 1); |
| 1494 | for (i = 0, special = 0; text[i] != '\0'; i++) |
| 1495 | switch (text[i]) |
| 1496 | { |
| 1497 | case '\'': |
| 1498 | strcpy (result + i + special, "'"); |
| 1499 | special += 5; |
| 1500 | break; |
| 1501 | case '\"': |
| 1502 | strcpy (result + i + special, """); |
| 1503 | special += 5; |
| 1504 | break; |
| 1505 | case '&': |
| 1506 | strcpy (result + i + special, "&"); |
| 1507 | special += 4; |
| 1508 | break; |
| 1509 | case '<': |
| 1510 | strcpy (result + i + special, "<"); |
| 1511 | special += 3; |
| 1512 | break; |
| 1513 | case '>': |
| 1514 | strcpy (result + i + special, ">"); |
| 1515 | special += 3; |
| 1516 | break; |
| 1517 | default: |
| 1518 | result[i + special] = text[i]; |
| 1519 | break; |
| 1520 | } |
| 1521 | result[i + special] = '\0'; |
| 1522 | |
| 1523 | return result; |
| 1524 | } |
| 1525 | |
| 1526 | void |
| 1527 | buffer_grow (struct buffer *buffer, const char *data, size_t size) |
| 1528 | { |
| 1529 | char *new_buffer; |
| 1530 | size_t new_buffer_size; |
| 1531 | |
| 1532 | if (size == 0) |
| 1533 | return; |
| 1534 | |
| 1535 | new_buffer_size = buffer->buffer_size; |
| 1536 | |
| 1537 | if (new_buffer_size == 0) |
| 1538 | new_buffer_size = 1; |
| 1539 | |
| 1540 | while (buffer->used_size + size > new_buffer_size) |
| 1541 | new_buffer_size *= 2; |
| 1542 | new_buffer = realloc (buffer->buffer, new_buffer_size); |
| 1543 | if (!new_buffer) |
| 1544 | abort (); |
| 1545 | memcpy (new_buffer + buffer->used_size, data, size); |
| 1546 | buffer->buffer = new_buffer; |
| 1547 | buffer->buffer_size = new_buffer_size; |
| 1548 | buffer->used_size += size; |
| 1549 | } |
| 1550 | |
| 1551 | void |
| 1552 | buffer_free (struct buffer *buffer) |
| 1553 | { |
| 1554 | if (!buffer) |
| 1555 | return; |
| 1556 | |
| 1557 | free (buffer->buffer); |
| 1558 | buffer->buffer = NULL; |
| 1559 | buffer->buffer_size = 0; |
| 1560 | buffer->used_size = 0; |
| 1561 | } |
| 1562 | |
| 1563 | void |
| 1564 | buffer_init (struct buffer *buffer) |
| 1565 | { |
| 1566 | memset (buffer, 0, sizeof (*buffer)); |
| 1567 | } |
| 1568 | |
| 1569 | char* |
| 1570 | buffer_finish (struct buffer *buffer) |
| 1571 | { |
| 1572 | char *ret = buffer->buffer; |
| 1573 | buffer->buffer = NULL; |
| 1574 | buffer->buffer_size = 0; |
| 1575 | buffer->used_size = 0; |
| 1576 | return ret; |
| 1577 | } |
| 1578 | |
| 1579 | void |
| 1580 | buffer_xml_printf (struct buffer *buffer, const char *format, ...) |
| 1581 | { |
| 1582 | va_list ap; |
| 1583 | const char *f; |
| 1584 | const char *prev; |
| 1585 | int percent = 0; |
| 1586 | |
| 1587 | va_start (ap, format); |
| 1588 | |
| 1589 | prev = format; |
| 1590 | for (f = format; *f; f++) |
| 1591 | { |
| 1592 | if (percent) |
| 1593 | { |
| 1594 | switch (*f) |
| 1595 | { |
| 1596 | case 's': |
| 1597 | { |
| 1598 | char *p; |
| 1599 | char *a = va_arg (ap, char *); |
| 1600 | buffer_grow (buffer, prev, f - prev - 1); |
| 1601 | p = xml_escape_text (a); |
| 1602 | buffer_grow_str (buffer, p); |
| 1603 | free (p); |
| 1604 | prev = f + 1; |
| 1605 | } |
| 1606 | break; |
| 1607 | } |
| 1608 | percent = 0; |
| 1609 | } |
| 1610 | else if (*f == '%') |
| 1611 | percent = 1; |
| 1612 | } |
| 1613 | |
| 1614 | buffer_grow_str (buffer, prev); |
| 1615 | va_end (ap); |
| 1616 | } |