| 1 | /* Remote File-I/O communications |
| 2 | |
| 3 | Copyright (C) 2003-2013 Free Software Foundation, Inc. |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | /* See the GDB User Guide for details of the GDB remote protocol. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include <string.h> |
| 24 | #include "gdbcmd.h" |
| 25 | #include "remote.h" |
| 26 | #include "gdb/fileio.h" |
| 27 | #include "gdb_wait.h" |
| 28 | #include <sys/stat.h> |
| 29 | #include "exceptions.h" |
| 30 | #include "remote-fileio.h" |
| 31 | #include "event-loop.h" |
| 32 | #include "target.h" |
| 33 | #include "filenames.h" |
| 34 | #include "filestuff.h" |
| 35 | |
| 36 | #include <fcntl.h> |
| 37 | #include <sys/time.h> |
| 38 | #ifdef __CYGWIN__ |
| 39 | #include <sys/cygwin.h> /* For cygwin_conv_path. */ |
| 40 | #endif |
| 41 | #include <signal.h> |
| 42 | |
| 43 | static struct { |
| 44 | int *fd_map; |
| 45 | int fd_map_size; |
| 46 | } remote_fio_data; |
| 47 | |
| 48 | #define FIO_FD_INVALID -1 |
| 49 | #define FIO_FD_CONSOLE_IN -2 |
| 50 | #define FIO_FD_CONSOLE_OUT -3 |
| 51 | |
| 52 | static int remote_fio_system_call_allowed = 0; |
| 53 | |
| 54 | static struct async_signal_handler *sigint_fileio_token; |
| 55 | |
| 56 | static int |
| 57 | remote_fileio_init_fd_map (void) |
| 58 | { |
| 59 | int i; |
| 60 | |
| 61 | if (!remote_fio_data.fd_map) |
| 62 | { |
| 63 | remote_fio_data.fd_map = (int *) xmalloc (10 * sizeof (int)); |
| 64 | remote_fio_data.fd_map_size = 10; |
| 65 | remote_fio_data.fd_map[0] = FIO_FD_CONSOLE_IN; |
| 66 | remote_fio_data.fd_map[1] = FIO_FD_CONSOLE_OUT; |
| 67 | remote_fio_data.fd_map[2] = FIO_FD_CONSOLE_OUT; |
| 68 | for (i = 3; i < 10; ++i) |
| 69 | remote_fio_data.fd_map[i] = FIO_FD_INVALID; |
| 70 | } |
| 71 | return 3; |
| 72 | } |
| 73 | |
| 74 | static int |
| 75 | remote_fileio_resize_fd_map (void) |
| 76 | { |
| 77 | int i = remote_fio_data.fd_map_size; |
| 78 | |
| 79 | if (!remote_fio_data.fd_map) |
| 80 | return remote_fileio_init_fd_map (); |
| 81 | remote_fio_data.fd_map_size += 10; |
| 82 | remote_fio_data.fd_map = |
| 83 | (int *) xrealloc (remote_fio_data.fd_map, |
| 84 | remote_fio_data.fd_map_size * sizeof (int)); |
| 85 | for (; i < remote_fio_data.fd_map_size; i++) |
| 86 | remote_fio_data.fd_map[i] = FIO_FD_INVALID; |
| 87 | return remote_fio_data.fd_map_size - 10; |
| 88 | } |
| 89 | |
| 90 | static int |
| 91 | remote_fileio_next_free_fd (void) |
| 92 | { |
| 93 | int i; |
| 94 | |
| 95 | for (i = 0; i < remote_fio_data.fd_map_size; ++i) |
| 96 | if (remote_fio_data.fd_map[i] == FIO_FD_INVALID) |
| 97 | return i; |
| 98 | return remote_fileio_resize_fd_map (); |
| 99 | } |
| 100 | |
| 101 | static int |
| 102 | remote_fileio_fd_to_targetfd (int fd) |
| 103 | { |
| 104 | int target_fd = remote_fileio_next_free_fd (); |
| 105 | |
| 106 | remote_fio_data.fd_map[target_fd] = fd; |
| 107 | return target_fd; |
| 108 | } |
| 109 | |
| 110 | static int |
| 111 | remote_fileio_map_fd (int target_fd) |
| 112 | { |
| 113 | remote_fileio_init_fd_map (); |
| 114 | if (target_fd < 0 || target_fd >= remote_fio_data.fd_map_size) |
| 115 | return FIO_FD_INVALID; |
| 116 | return remote_fio_data.fd_map[target_fd]; |
| 117 | } |
| 118 | |
| 119 | static void |
| 120 | remote_fileio_close_target_fd (int target_fd) |
| 121 | { |
| 122 | remote_fileio_init_fd_map (); |
| 123 | if (target_fd >= 0 && target_fd < remote_fio_data.fd_map_size) |
| 124 | remote_fio_data.fd_map[target_fd] = FIO_FD_INVALID; |
| 125 | } |
| 126 | |
| 127 | static int |
| 128 | remote_fileio_oflags_to_host (long flags) |
| 129 | { |
| 130 | int hflags = 0; |
| 131 | |
| 132 | if (flags & FILEIO_O_CREAT) |
| 133 | hflags |= O_CREAT; |
| 134 | if (flags & FILEIO_O_EXCL) |
| 135 | hflags |= O_EXCL; |
| 136 | if (flags & FILEIO_O_TRUNC) |
| 137 | hflags |= O_TRUNC; |
| 138 | if (flags & FILEIO_O_APPEND) |
| 139 | hflags |= O_APPEND; |
| 140 | if (flags & FILEIO_O_RDONLY) |
| 141 | hflags |= O_RDONLY; |
| 142 | if (flags & FILEIO_O_WRONLY) |
| 143 | hflags |= O_WRONLY; |
| 144 | if (flags & FILEIO_O_RDWR) |
| 145 | hflags |= O_RDWR; |
| 146 | /* On systems supporting binary and text mode, always open files in |
| 147 | binary mode. */ |
| 148 | #ifdef O_BINARY |
| 149 | hflags |= O_BINARY; |
| 150 | #endif |
| 151 | return hflags; |
| 152 | } |
| 153 | |
| 154 | static mode_t |
| 155 | remote_fileio_mode_to_host (long mode, int open_call) |
| 156 | { |
| 157 | mode_t hmode = 0; |
| 158 | |
| 159 | if (!open_call) |
| 160 | { |
| 161 | if (mode & FILEIO_S_IFREG) |
| 162 | hmode |= S_IFREG; |
| 163 | if (mode & FILEIO_S_IFDIR) |
| 164 | hmode |= S_IFDIR; |
| 165 | if (mode & FILEIO_S_IFCHR) |
| 166 | hmode |= S_IFCHR; |
| 167 | } |
| 168 | if (mode & FILEIO_S_IRUSR) |
| 169 | hmode |= S_IRUSR; |
| 170 | if (mode & FILEIO_S_IWUSR) |
| 171 | hmode |= S_IWUSR; |
| 172 | if (mode & FILEIO_S_IXUSR) |
| 173 | hmode |= S_IXUSR; |
| 174 | #ifdef S_IRGRP |
| 175 | if (mode & FILEIO_S_IRGRP) |
| 176 | hmode |= S_IRGRP; |
| 177 | #endif |
| 178 | #ifdef S_IWGRP |
| 179 | if (mode & FILEIO_S_IWGRP) |
| 180 | hmode |= S_IWGRP; |
| 181 | #endif |
| 182 | #ifdef S_IXGRP |
| 183 | if (mode & FILEIO_S_IXGRP) |
| 184 | hmode |= S_IXGRP; |
| 185 | #endif |
| 186 | if (mode & FILEIO_S_IROTH) |
| 187 | hmode |= S_IROTH; |
| 188 | #ifdef S_IWOTH |
| 189 | if (mode & FILEIO_S_IWOTH) |
| 190 | hmode |= S_IWOTH; |
| 191 | #endif |
| 192 | #ifdef S_IXOTH |
| 193 | if (mode & FILEIO_S_IXOTH) |
| 194 | hmode |= S_IXOTH; |
| 195 | #endif |
| 196 | return hmode; |
| 197 | } |
| 198 | |
| 199 | static LONGEST |
| 200 | remote_fileio_mode_to_target (mode_t mode) |
| 201 | { |
| 202 | mode_t tmode = 0; |
| 203 | |
| 204 | if (S_ISREG(mode)) |
| 205 | tmode |= FILEIO_S_IFREG; |
| 206 | if (S_ISDIR(mode)) |
| 207 | tmode |= FILEIO_S_IFDIR; |
| 208 | if (S_ISCHR(mode)) |
| 209 | tmode |= FILEIO_S_IFCHR; |
| 210 | if (mode & S_IRUSR) |
| 211 | tmode |= FILEIO_S_IRUSR; |
| 212 | if (mode & S_IWUSR) |
| 213 | tmode |= FILEIO_S_IWUSR; |
| 214 | if (mode & S_IXUSR) |
| 215 | tmode |= FILEIO_S_IXUSR; |
| 216 | #ifdef S_IRGRP |
| 217 | if (mode & S_IRGRP) |
| 218 | tmode |= FILEIO_S_IRGRP; |
| 219 | #endif |
| 220 | #ifdef S_IWRGRP |
| 221 | if (mode & S_IWGRP) |
| 222 | tmode |= FILEIO_S_IWGRP; |
| 223 | #endif |
| 224 | #ifdef S_IXGRP |
| 225 | if (mode & S_IXGRP) |
| 226 | tmode |= FILEIO_S_IXGRP; |
| 227 | #endif |
| 228 | if (mode & S_IROTH) |
| 229 | tmode |= FILEIO_S_IROTH; |
| 230 | #ifdef S_IWOTH |
| 231 | if (mode & S_IWOTH) |
| 232 | tmode |= FILEIO_S_IWOTH; |
| 233 | #endif |
| 234 | #ifdef S_IXOTH |
| 235 | if (mode & S_IXOTH) |
| 236 | tmode |= FILEIO_S_IXOTH; |
| 237 | #endif |
| 238 | return tmode; |
| 239 | } |
| 240 | |
| 241 | static int |
| 242 | remote_fileio_errno_to_target (int error) |
| 243 | { |
| 244 | switch (error) |
| 245 | { |
| 246 | case EPERM: |
| 247 | return FILEIO_EPERM; |
| 248 | case ENOENT: |
| 249 | return FILEIO_ENOENT; |
| 250 | case EINTR: |
| 251 | return FILEIO_EINTR; |
| 252 | case EIO: |
| 253 | return FILEIO_EIO; |
| 254 | case EBADF: |
| 255 | return FILEIO_EBADF; |
| 256 | case EACCES: |
| 257 | return FILEIO_EACCES; |
| 258 | case EFAULT: |
| 259 | return FILEIO_EFAULT; |
| 260 | case EBUSY: |
| 261 | return FILEIO_EBUSY; |
| 262 | case EEXIST: |
| 263 | return FILEIO_EEXIST; |
| 264 | case ENODEV: |
| 265 | return FILEIO_ENODEV; |
| 266 | case ENOTDIR: |
| 267 | return FILEIO_ENOTDIR; |
| 268 | case EISDIR: |
| 269 | return FILEIO_EISDIR; |
| 270 | case EINVAL: |
| 271 | return FILEIO_EINVAL; |
| 272 | case ENFILE: |
| 273 | return FILEIO_ENFILE; |
| 274 | case EMFILE: |
| 275 | return FILEIO_EMFILE; |
| 276 | case EFBIG: |
| 277 | return FILEIO_EFBIG; |
| 278 | case ENOSPC: |
| 279 | return FILEIO_ENOSPC; |
| 280 | case ESPIPE: |
| 281 | return FILEIO_ESPIPE; |
| 282 | case EROFS: |
| 283 | return FILEIO_EROFS; |
| 284 | case ENOSYS: |
| 285 | return FILEIO_ENOSYS; |
| 286 | case ENAMETOOLONG: |
| 287 | return FILEIO_ENAMETOOLONG; |
| 288 | } |
| 289 | return FILEIO_EUNKNOWN; |
| 290 | } |
| 291 | |
| 292 | static int |
| 293 | remote_fileio_seek_flag_to_host (long num, int *flag) |
| 294 | { |
| 295 | if (!flag) |
| 296 | return 0; |
| 297 | switch (num) |
| 298 | { |
| 299 | case FILEIO_SEEK_SET: |
| 300 | *flag = SEEK_SET; |
| 301 | break; |
| 302 | case FILEIO_SEEK_CUR: |
| 303 | *flag = SEEK_CUR; |
| 304 | break; |
| 305 | case FILEIO_SEEK_END: |
| 306 | *flag = SEEK_END; |
| 307 | break; |
| 308 | default: |
| 309 | return -1; |
| 310 | } |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | static int |
| 315 | remote_fileio_extract_long (char **buf, LONGEST *retlong) |
| 316 | { |
| 317 | char *c; |
| 318 | int sign = 1; |
| 319 | |
| 320 | if (!buf || !*buf || !**buf || !retlong) |
| 321 | return -1; |
| 322 | c = strchr (*buf, ','); |
| 323 | if (c) |
| 324 | *c++ = '\0'; |
| 325 | else |
| 326 | c = strchr (*buf, '\0'); |
| 327 | while (strchr ("+-", **buf)) |
| 328 | { |
| 329 | if (**buf == '-') |
| 330 | sign = -sign; |
| 331 | ++*buf; |
| 332 | } |
| 333 | for (*retlong = 0; **buf; ++*buf) |
| 334 | { |
| 335 | *retlong <<= 4; |
| 336 | if (**buf >= '0' && **buf <= '9') |
| 337 | *retlong += **buf - '0'; |
| 338 | else if (**buf >= 'a' && **buf <= 'f') |
| 339 | *retlong += **buf - 'a' + 10; |
| 340 | else if (**buf >= 'A' && **buf <= 'F') |
| 341 | *retlong += **buf - 'A' + 10; |
| 342 | else |
| 343 | return -1; |
| 344 | } |
| 345 | *retlong *= sign; |
| 346 | *buf = c; |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | static int |
| 351 | remote_fileio_extract_int (char **buf, long *retint) |
| 352 | { |
| 353 | int ret; |
| 354 | LONGEST retlong; |
| 355 | |
| 356 | if (!retint) |
| 357 | return -1; |
| 358 | ret = remote_fileio_extract_long (buf, &retlong); |
| 359 | if (!ret) |
| 360 | *retint = (long) retlong; |
| 361 | return ret; |
| 362 | } |
| 363 | |
| 364 | static int |
| 365 | remote_fileio_extract_ptr_w_len (char **buf, CORE_ADDR *ptrval, int *length) |
| 366 | { |
| 367 | char *c; |
| 368 | LONGEST retlong; |
| 369 | |
| 370 | if (!buf || !*buf || !**buf || !ptrval || !length) |
| 371 | return -1; |
| 372 | c = strchr (*buf, '/'); |
| 373 | if (!c) |
| 374 | return -1; |
| 375 | *c++ = '\0'; |
| 376 | if (remote_fileio_extract_long (buf, &retlong)) |
| 377 | return -1; |
| 378 | *ptrval = (CORE_ADDR) retlong; |
| 379 | *buf = c; |
| 380 | if (remote_fileio_extract_long (buf, &retlong)) |
| 381 | return -1; |
| 382 | *length = (int) retlong; |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | /* Convert to big endian. */ |
| 387 | static void |
| 388 | remote_fileio_to_be (LONGEST num, char *buf, int bytes) |
| 389 | { |
| 390 | int i; |
| 391 | |
| 392 | for (i = 0; i < bytes; ++i) |
| 393 | buf[i] = (num >> (8 * (bytes - i - 1))) & 0xff; |
| 394 | } |
| 395 | |
| 396 | static void |
| 397 | remote_fileio_to_fio_uint (long num, fio_uint_t fnum) |
| 398 | { |
| 399 | remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); |
| 400 | } |
| 401 | |
| 402 | static void |
| 403 | remote_fileio_to_fio_mode (mode_t num, fio_mode_t fnum) |
| 404 | { |
| 405 | remote_fileio_to_be (remote_fileio_mode_to_target(num), (char *) fnum, 4); |
| 406 | } |
| 407 | |
| 408 | static void |
| 409 | remote_fileio_to_fio_time (time_t num, fio_time_t fnum) |
| 410 | { |
| 411 | remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); |
| 412 | } |
| 413 | |
| 414 | static void |
| 415 | remote_fileio_to_fio_long (LONGEST num, fio_long_t fnum) |
| 416 | { |
| 417 | remote_fileio_to_be (num, (char *) fnum, 8); |
| 418 | } |
| 419 | |
| 420 | static void |
| 421 | remote_fileio_to_fio_ulong (LONGEST num, fio_ulong_t fnum) |
| 422 | { |
| 423 | remote_fileio_to_be (num, (char *) fnum, 8); |
| 424 | } |
| 425 | |
| 426 | static void |
| 427 | remote_fileio_to_fio_stat (struct stat *st, struct fio_stat *fst) |
| 428 | { |
| 429 | LONGEST blksize; |
| 430 | |
| 431 | /* `st_dev' is set in the calling function. */ |
| 432 | remote_fileio_to_fio_uint ((long) st->st_ino, fst->fst_ino); |
| 433 | remote_fileio_to_fio_mode (st->st_mode, fst->fst_mode); |
| 434 | remote_fileio_to_fio_uint ((long) st->st_nlink, fst->fst_nlink); |
| 435 | remote_fileio_to_fio_uint ((long) st->st_uid, fst->fst_uid); |
| 436 | remote_fileio_to_fio_uint ((long) st->st_gid, fst->fst_gid); |
| 437 | remote_fileio_to_fio_uint ((long) st->st_rdev, fst->fst_rdev); |
| 438 | remote_fileio_to_fio_ulong ((LONGEST) st->st_size, fst->fst_size); |
| 439 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
| 440 | blksize = st->st_blksize; |
| 441 | #else |
| 442 | blksize = 512; |
| 443 | #endif |
| 444 | remote_fileio_to_fio_ulong (blksize, fst->fst_blksize); |
| 445 | #if HAVE_STRUCT_STAT_ST_BLOCKS |
| 446 | remote_fileio_to_fio_ulong ((LONGEST) st->st_blocks, fst->fst_blocks); |
| 447 | #else |
| 448 | /* FIXME: This is correct for DJGPP, but other systems that don't |
| 449 | have st_blocks, if any, might prefer 512 instead of st_blksize. |
| 450 | (eliz, 30-12-2003) */ |
| 451 | remote_fileio_to_fio_ulong (((LONGEST) st->st_size + blksize - 1) |
| 452 | / blksize, |
| 453 | fst->fst_blocks); |
| 454 | #endif |
| 455 | remote_fileio_to_fio_time (st->st_atime, fst->fst_atime); |
| 456 | remote_fileio_to_fio_time (st->st_mtime, fst->fst_mtime); |
| 457 | remote_fileio_to_fio_time (st->st_ctime, fst->fst_ctime); |
| 458 | } |
| 459 | |
| 460 | static void |
| 461 | remote_fileio_to_fio_timeval (struct timeval *tv, struct fio_timeval *ftv) |
| 462 | { |
| 463 | remote_fileio_to_fio_time (tv->tv_sec, ftv->ftv_sec); |
| 464 | remote_fileio_to_fio_long (tv->tv_usec, ftv->ftv_usec); |
| 465 | } |
| 466 | |
| 467 | static int remote_fio_ctrl_c_flag = 0; |
| 468 | static int remote_fio_no_longjmp = 0; |
| 469 | |
| 470 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 471 | static struct sigaction remote_fio_sa; |
| 472 | static struct sigaction remote_fio_osa; |
| 473 | #else |
| 474 | static void (*remote_fio_ofunc)(int); |
| 475 | #endif |
| 476 | |
| 477 | static void |
| 478 | remote_fileio_sig_init (void) |
| 479 | { |
| 480 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 481 | remote_fio_sa.sa_handler = SIG_IGN; |
| 482 | sigemptyset (&remote_fio_sa.sa_mask); |
| 483 | remote_fio_sa.sa_flags = 0; |
| 484 | sigaction (SIGINT, &remote_fio_sa, &remote_fio_osa); |
| 485 | #else |
| 486 | remote_fio_ofunc = signal (SIGINT, SIG_IGN); |
| 487 | #endif |
| 488 | } |
| 489 | |
| 490 | static void |
| 491 | remote_fileio_sig_set (void (*sigint_func)(int)) |
| 492 | { |
| 493 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 494 | remote_fio_sa.sa_handler = sigint_func; |
| 495 | sigemptyset (&remote_fio_sa.sa_mask); |
| 496 | remote_fio_sa.sa_flags = 0; |
| 497 | sigaction (SIGINT, &remote_fio_sa, NULL); |
| 498 | #else |
| 499 | signal (SIGINT, sigint_func); |
| 500 | #endif |
| 501 | } |
| 502 | |
| 503 | static void |
| 504 | remote_fileio_sig_exit (void) |
| 505 | { |
| 506 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 507 | sigaction (SIGINT, &remote_fio_osa, NULL); |
| 508 | #else |
| 509 | signal (SIGINT, remote_fio_ofunc); |
| 510 | #endif |
| 511 | } |
| 512 | |
| 513 | static void |
| 514 | async_remote_fileio_interrupt (gdb_client_data arg) |
| 515 | { |
| 516 | quit (); |
| 517 | } |
| 518 | |
| 519 | static void |
| 520 | remote_fileio_ctrl_c_signal_handler (int signo) |
| 521 | { |
| 522 | remote_fileio_sig_set (SIG_IGN); |
| 523 | remote_fio_ctrl_c_flag = 1; |
| 524 | if (!remote_fio_no_longjmp) |
| 525 | gdb_call_async_signal_handler (sigint_fileio_token, 1); |
| 526 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); |
| 527 | } |
| 528 | |
| 529 | static void |
| 530 | remote_fileio_reply (int retcode, int error) |
| 531 | { |
| 532 | char buf[32]; |
| 533 | |
| 534 | remote_fileio_sig_set (SIG_IGN); |
| 535 | strcpy (buf, "F"); |
| 536 | if (retcode < 0) |
| 537 | { |
| 538 | strcat (buf, "-"); |
| 539 | retcode = -retcode; |
| 540 | } |
| 541 | sprintf (buf + strlen (buf), "%x", retcode); |
| 542 | if (error || remote_fio_ctrl_c_flag) |
| 543 | { |
| 544 | if (error && remote_fio_ctrl_c_flag) |
| 545 | error = FILEIO_EINTR; |
| 546 | if (error < 0) |
| 547 | { |
| 548 | strcat (buf, "-"); |
| 549 | error = -error; |
| 550 | } |
| 551 | sprintf (buf + strlen (buf), ",%x", error); |
| 552 | if (remote_fio_ctrl_c_flag) |
| 553 | strcat (buf, ",C"); |
| 554 | } |
| 555 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); |
| 556 | putpkt (buf); |
| 557 | } |
| 558 | |
| 559 | static void |
| 560 | remote_fileio_ioerror (void) |
| 561 | { |
| 562 | remote_fileio_reply (-1, FILEIO_EIO); |
| 563 | } |
| 564 | |
| 565 | static void |
| 566 | remote_fileio_badfd (void) |
| 567 | { |
| 568 | remote_fileio_reply (-1, FILEIO_EBADF); |
| 569 | } |
| 570 | |
| 571 | static void |
| 572 | remote_fileio_return_errno (int retcode) |
| 573 | { |
| 574 | remote_fileio_reply (retcode, retcode < 0 |
| 575 | ? remote_fileio_errno_to_target (errno) : 0); |
| 576 | } |
| 577 | |
| 578 | static void |
| 579 | remote_fileio_return_success (int retcode) |
| 580 | { |
| 581 | remote_fileio_reply (retcode, 0); |
| 582 | } |
| 583 | |
| 584 | static void |
| 585 | remote_fileio_func_open (char *buf) |
| 586 | { |
| 587 | CORE_ADDR ptrval; |
| 588 | int length; |
| 589 | long num; |
| 590 | int flags, fd; |
| 591 | mode_t mode; |
| 592 | char *pathname; |
| 593 | struct stat st; |
| 594 | |
| 595 | /* 1. Parameter: Ptr to pathname / length incl. trailing zero. */ |
| 596 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 597 | { |
| 598 | remote_fileio_ioerror (); |
| 599 | return; |
| 600 | } |
| 601 | /* 2. Parameter: open flags */ |
| 602 | if (remote_fileio_extract_int (&buf, &num)) |
| 603 | { |
| 604 | remote_fileio_ioerror (); |
| 605 | return; |
| 606 | } |
| 607 | flags = remote_fileio_oflags_to_host (num); |
| 608 | /* 3. Parameter: open mode */ |
| 609 | if (remote_fileio_extract_int (&buf, &num)) |
| 610 | { |
| 611 | remote_fileio_ioerror (); |
| 612 | return; |
| 613 | } |
| 614 | mode = remote_fileio_mode_to_host (num, 1); |
| 615 | |
| 616 | /* Request pathname. */ |
| 617 | pathname = alloca (length); |
| 618 | if (target_read_memory (ptrval, (gdb_byte *) pathname, length) != 0) |
| 619 | { |
| 620 | remote_fileio_ioerror (); |
| 621 | return; |
| 622 | } |
| 623 | |
| 624 | /* Check if pathname exists and is not a regular file or directory. If so, |
| 625 | return an appropriate error code. Same for trying to open directories |
| 626 | for writing. */ |
| 627 | if (!stat (pathname, &st)) |
| 628 | { |
| 629 | if (!S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) |
| 630 | { |
| 631 | remote_fileio_reply (-1, FILEIO_ENODEV); |
| 632 | return; |
| 633 | } |
| 634 | if (S_ISDIR (st.st_mode) |
| 635 | && ((flags & O_WRONLY) == O_WRONLY || (flags & O_RDWR) == O_RDWR)) |
| 636 | { |
| 637 | remote_fileio_reply (-1, FILEIO_EISDIR); |
| 638 | return; |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | remote_fio_no_longjmp = 1; |
| 643 | fd = gdb_open_cloexec (pathname, flags, mode); |
| 644 | if (fd < 0) |
| 645 | { |
| 646 | remote_fileio_return_errno (-1); |
| 647 | return; |
| 648 | } |
| 649 | |
| 650 | fd = remote_fileio_fd_to_targetfd (fd); |
| 651 | remote_fileio_return_success (fd); |
| 652 | } |
| 653 | |
| 654 | static void |
| 655 | remote_fileio_func_close (char *buf) |
| 656 | { |
| 657 | long num; |
| 658 | int fd; |
| 659 | |
| 660 | /* Parameter: file descriptor */ |
| 661 | if (remote_fileio_extract_int (&buf, &num)) |
| 662 | { |
| 663 | remote_fileio_ioerror (); |
| 664 | return; |
| 665 | } |
| 666 | fd = remote_fileio_map_fd ((int) num); |
| 667 | if (fd == FIO_FD_INVALID) |
| 668 | { |
| 669 | remote_fileio_badfd (); |
| 670 | return; |
| 671 | } |
| 672 | |
| 673 | remote_fio_no_longjmp = 1; |
| 674 | if (fd != FIO_FD_CONSOLE_IN && fd != FIO_FD_CONSOLE_OUT && close (fd)) |
| 675 | remote_fileio_return_errno (-1); |
| 676 | remote_fileio_close_target_fd ((int) num); |
| 677 | remote_fileio_return_success (0); |
| 678 | } |
| 679 | |
| 680 | static void |
| 681 | remote_fileio_func_read (char *buf) |
| 682 | { |
| 683 | long target_fd, num; |
| 684 | LONGEST lnum; |
| 685 | CORE_ADDR ptrval; |
| 686 | int fd, ret; |
| 687 | gdb_byte *buffer; |
| 688 | size_t length; |
| 689 | off_t old_offset, new_offset; |
| 690 | |
| 691 | /* 1. Parameter: file descriptor */ |
| 692 | if (remote_fileio_extract_int (&buf, &target_fd)) |
| 693 | { |
| 694 | remote_fileio_ioerror (); |
| 695 | return; |
| 696 | } |
| 697 | fd = remote_fileio_map_fd ((int) target_fd); |
| 698 | if (fd == FIO_FD_INVALID) |
| 699 | { |
| 700 | remote_fileio_badfd (); |
| 701 | return; |
| 702 | } |
| 703 | /* 2. Parameter: buffer pointer */ |
| 704 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 705 | { |
| 706 | remote_fileio_ioerror (); |
| 707 | return; |
| 708 | } |
| 709 | ptrval = (CORE_ADDR) lnum; |
| 710 | /* 3. Parameter: buffer length */ |
| 711 | if (remote_fileio_extract_int (&buf, &num)) |
| 712 | { |
| 713 | remote_fileio_ioerror (); |
| 714 | return; |
| 715 | } |
| 716 | length = (size_t) num; |
| 717 | |
| 718 | switch (fd) |
| 719 | { |
| 720 | case FIO_FD_CONSOLE_OUT: |
| 721 | remote_fileio_badfd (); |
| 722 | return; |
| 723 | case FIO_FD_CONSOLE_IN: |
| 724 | { |
| 725 | static char *remaining_buf = NULL; |
| 726 | static int remaining_length = 0; |
| 727 | |
| 728 | buffer = (gdb_byte *) xmalloc (16384); |
| 729 | if (remaining_buf) |
| 730 | { |
| 731 | remote_fio_no_longjmp = 1; |
| 732 | if (remaining_length > length) |
| 733 | { |
| 734 | memcpy (buffer, remaining_buf, length); |
| 735 | memmove (remaining_buf, remaining_buf + length, |
| 736 | remaining_length - length); |
| 737 | remaining_length -= length; |
| 738 | ret = length; |
| 739 | } |
| 740 | else |
| 741 | { |
| 742 | memcpy (buffer, remaining_buf, remaining_length); |
| 743 | xfree (remaining_buf); |
| 744 | remaining_buf = NULL; |
| 745 | ret = remaining_length; |
| 746 | } |
| 747 | } |
| 748 | else |
| 749 | { |
| 750 | /* Windows (at least XP and Server 2003) has difficulty |
| 751 | with large reads from consoles. If a handle is |
| 752 | backed by a real console device, overly large reads |
| 753 | from the handle will fail and set errno == ENOMEM. |
| 754 | On a Windows Server 2003 system where I tested, |
| 755 | reading 26608 bytes from the console was OK, but |
| 756 | anything above 26609 bytes would fail. The limit has |
| 757 | been observed to vary on different systems. So, we |
| 758 | limit this read to something smaller than that - by a |
| 759 | safe margin, in case the limit depends on system |
| 760 | resources or version. */ |
| 761 | ret = ui_file_read (gdb_stdtargin, (char *) buffer, 16383); |
| 762 | remote_fio_no_longjmp = 1; |
| 763 | if (ret > 0 && (size_t)ret > length) |
| 764 | { |
| 765 | remaining_buf = (char *) xmalloc (ret - length); |
| 766 | remaining_length = ret - length; |
| 767 | memcpy (remaining_buf, buffer + length, remaining_length); |
| 768 | ret = length; |
| 769 | } |
| 770 | } |
| 771 | } |
| 772 | break; |
| 773 | default: |
| 774 | buffer = (gdb_byte *) xmalloc (length); |
| 775 | /* POSIX defines EINTR behaviour of read in a weird way. It's allowed |
| 776 | for read() to return -1 even if "some" bytes have been read. It |
| 777 | has been corrected in SUSv2 but that doesn't help us much... |
| 778 | Therefore a complete solution must check how many bytes have been |
| 779 | read on EINTR to return a more reliable value to the target */ |
| 780 | old_offset = lseek (fd, 0, SEEK_CUR); |
| 781 | remote_fio_no_longjmp = 1; |
| 782 | ret = read (fd, buffer, length); |
| 783 | if (ret < 0 && errno == EINTR) |
| 784 | { |
| 785 | new_offset = lseek (fd, 0, SEEK_CUR); |
| 786 | /* If some data has been read, return the number of bytes read. |
| 787 | The Ctrl-C flag is set in remote_fileio_reply() anyway. */ |
| 788 | if (old_offset != new_offset) |
| 789 | ret = new_offset - old_offset; |
| 790 | } |
| 791 | break; |
| 792 | } |
| 793 | |
| 794 | if (ret > 0) |
| 795 | { |
| 796 | errno = target_write_memory (ptrval, buffer, ret); |
| 797 | if (errno != 0) |
| 798 | ret = -1; |
| 799 | } |
| 800 | |
| 801 | if (ret < 0) |
| 802 | remote_fileio_return_errno (-1); |
| 803 | else |
| 804 | remote_fileio_return_success (ret); |
| 805 | |
| 806 | xfree (buffer); |
| 807 | } |
| 808 | |
| 809 | static void |
| 810 | remote_fileio_func_write (char *buf) |
| 811 | { |
| 812 | long target_fd, num; |
| 813 | LONGEST lnum; |
| 814 | CORE_ADDR ptrval; |
| 815 | int fd, ret; |
| 816 | gdb_byte *buffer; |
| 817 | size_t length; |
| 818 | |
| 819 | /* 1. Parameter: file descriptor */ |
| 820 | if (remote_fileio_extract_int (&buf, &target_fd)) |
| 821 | { |
| 822 | remote_fileio_ioerror (); |
| 823 | return; |
| 824 | } |
| 825 | fd = remote_fileio_map_fd ((int) target_fd); |
| 826 | if (fd == FIO_FD_INVALID) |
| 827 | { |
| 828 | remote_fileio_badfd (); |
| 829 | return; |
| 830 | } |
| 831 | /* 2. Parameter: buffer pointer */ |
| 832 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 833 | { |
| 834 | remote_fileio_ioerror (); |
| 835 | return; |
| 836 | } |
| 837 | ptrval = (CORE_ADDR) lnum; |
| 838 | /* 3. Parameter: buffer length */ |
| 839 | if (remote_fileio_extract_int (&buf, &num)) |
| 840 | { |
| 841 | remote_fileio_ioerror (); |
| 842 | return; |
| 843 | } |
| 844 | length = (size_t) num; |
| 845 | |
| 846 | buffer = (gdb_byte *) xmalloc (length); |
| 847 | if (target_read_memory (ptrval, buffer, length) != 0) |
| 848 | { |
| 849 | xfree (buffer); |
| 850 | remote_fileio_ioerror (); |
| 851 | return; |
| 852 | } |
| 853 | |
| 854 | remote_fio_no_longjmp = 1; |
| 855 | switch (fd) |
| 856 | { |
| 857 | case FIO_FD_CONSOLE_IN: |
| 858 | remote_fileio_badfd (); |
| 859 | xfree (buffer); |
| 860 | return; |
| 861 | case FIO_FD_CONSOLE_OUT: |
| 862 | ui_file_write (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr, |
| 863 | (char *) buffer, length); |
| 864 | gdb_flush (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr); |
| 865 | ret = length; |
| 866 | break; |
| 867 | default: |
| 868 | ret = write (fd, buffer, length); |
| 869 | if (ret < 0 && errno == EACCES) |
| 870 | errno = EBADF; /* Cygwin returns EACCESS when writing to a |
| 871 | R/O file. */ |
| 872 | break; |
| 873 | } |
| 874 | |
| 875 | if (ret < 0) |
| 876 | remote_fileio_return_errno (-1); |
| 877 | else |
| 878 | remote_fileio_return_success (ret); |
| 879 | |
| 880 | xfree (buffer); |
| 881 | } |
| 882 | |
| 883 | static void |
| 884 | remote_fileio_func_lseek (char *buf) |
| 885 | { |
| 886 | long num; |
| 887 | LONGEST lnum; |
| 888 | int fd, flag; |
| 889 | off_t offset, ret; |
| 890 | |
| 891 | /* 1. Parameter: file descriptor */ |
| 892 | if (remote_fileio_extract_int (&buf, &num)) |
| 893 | { |
| 894 | remote_fileio_ioerror (); |
| 895 | return; |
| 896 | } |
| 897 | fd = remote_fileio_map_fd ((int) num); |
| 898 | if (fd == FIO_FD_INVALID) |
| 899 | { |
| 900 | remote_fileio_badfd (); |
| 901 | return; |
| 902 | } |
| 903 | else if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) |
| 904 | { |
| 905 | remote_fileio_reply (-1, FILEIO_ESPIPE); |
| 906 | return; |
| 907 | } |
| 908 | |
| 909 | /* 2. Parameter: offset */ |
| 910 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 911 | { |
| 912 | remote_fileio_ioerror (); |
| 913 | return; |
| 914 | } |
| 915 | offset = (off_t) lnum; |
| 916 | /* 3. Parameter: flag */ |
| 917 | if (remote_fileio_extract_int (&buf, &num)) |
| 918 | { |
| 919 | remote_fileio_ioerror (); |
| 920 | return; |
| 921 | } |
| 922 | if (remote_fileio_seek_flag_to_host (num, &flag)) |
| 923 | { |
| 924 | remote_fileio_reply (-1, FILEIO_EINVAL); |
| 925 | return; |
| 926 | } |
| 927 | |
| 928 | remote_fio_no_longjmp = 1; |
| 929 | ret = lseek (fd, offset, flag); |
| 930 | |
| 931 | if (ret == (off_t) -1) |
| 932 | remote_fileio_return_errno (-1); |
| 933 | else |
| 934 | remote_fileio_return_success (ret); |
| 935 | } |
| 936 | |
| 937 | static void |
| 938 | remote_fileio_func_rename (char *buf) |
| 939 | { |
| 940 | CORE_ADDR old_ptr, new_ptr; |
| 941 | int old_len, new_len; |
| 942 | char *oldpath, *newpath; |
| 943 | int ret, of, nf; |
| 944 | struct stat ost, nst; |
| 945 | |
| 946 | /* 1. Parameter: Ptr to oldpath / length incl. trailing zero */ |
| 947 | if (remote_fileio_extract_ptr_w_len (&buf, &old_ptr, &old_len)) |
| 948 | { |
| 949 | remote_fileio_ioerror (); |
| 950 | return; |
| 951 | } |
| 952 | |
| 953 | /* 2. Parameter: Ptr to newpath / length incl. trailing zero */ |
| 954 | if (remote_fileio_extract_ptr_w_len (&buf, &new_ptr, &new_len)) |
| 955 | { |
| 956 | remote_fileio_ioerror (); |
| 957 | return; |
| 958 | } |
| 959 | |
| 960 | /* Request oldpath using 'm' packet */ |
| 961 | oldpath = alloca (old_len); |
| 962 | if (target_read_memory (old_ptr, (gdb_byte *) oldpath, old_len) != 0) |
| 963 | { |
| 964 | remote_fileio_ioerror (); |
| 965 | return; |
| 966 | } |
| 967 | |
| 968 | /* Request newpath using 'm' packet */ |
| 969 | newpath = alloca (new_len); |
| 970 | if (target_read_memory (new_ptr, (gdb_byte *) newpath, new_len) != 0) |
| 971 | { |
| 972 | remote_fileio_ioerror (); |
| 973 | return; |
| 974 | } |
| 975 | |
| 976 | /* Only operate on regular files and directories. */ |
| 977 | of = stat (oldpath, &ost); |
| 978 | nf = stat (newpath, &nst); |
| 979 | if ((!of && !S_ISREG (ost.st_mode) && !S_ISDIR (ost.st_mode)) |
| 980 | || (!nf && !S_ISREG (nst.st_mode) && !S_ISDIR (nst.st_mode))) |
| 981 | { |
| 982 | remote_fileio_reply (-1, FILEIO_EACCES); |
| 983 | return; |
| 984 | } |
| 985 | |
| 986 | remote_fio_no_longjmp = 1; |
| 987 | ret = rename (oldpath, newpath); |
| 988 | |
| 989 | if (ret == -1) |
| 990 | { |
| 991 | /* Special case: newpath is a non-empty directory. Some systems |
| 992 | return ENOTEMPTY, some return EEXIST. We coerce that to be |
| 993 | always EEXIST. */ |
| 994 | if (errno == ENOTEMPTY) |
| 995 | errno = EEXIST; |
| 996 | #ifdef __CYGWIN__ |
| 997 | /* Workaround some Cygwin problems with correct errnos. */ |
| 998 | if (errno == EACCES) |
| 999 | { |
| 1000 | if (!of && !nf && S_ISDIR (nst.st_mode)) |
| 1001 | { |
| 1002 | if (S_ISREG (ost.st_mode)) |
| 1003 | errno = EISDIR; |
| 1004 | else |
| 1005 | { |
| 1006 | char oldfullpath[PATH_MAX]; |
| 1007 | char newfullpath[PATH_MAX]; |
| 1008 | int len; |
| 1009 | |
| 1010 | cygwin_conv_path (CCP_WIN_A_TO_POSIX, oldpath, oldfullpath, |
| 1011 | PATH_MAX); |
| 1012 | cygwin_conv_path (CCP_WIN_A_TO_POSIX, newpath, newfullpath, |
| 1013 | PATH_MAX); |
| 1014 | len = strlen (oldfullpath); |
| 1015 | if (IS_DIR_SEPARATOR (newfullpath[len]) |
| 1016 | && !filename_ncmp (oldfullpath, newfullpath, len)) |
| 1017 | errno = EINVAL; |
| 1018 | else |
| 1019 | errno = EEXIST; |
| 1020 | } |
| 1021 | } |
| 1022 | } |
| 1023 | #endif |
| 1024 | |
| 1025 | remote_fileio_return_errno (-1); |
| 1026 | } |
| 1027 | else |
| 1028 | remote_fileio_return_success (ret); |
| 1029 | } |
| 1030 | |
| 1031 | static void |
| 1032 | remote_fileio_func_unlink (char *buf) |
| 1033 | { |
| 1034 | CORE_ADDR ptrval; |
| 1035 | int length; |
| 1036 | char *pathname; |
| 1037 | int ret; |
| 1038 | struct stat st; |
| 1039 | |
| 1040 | /* Parameter: Ptr to pathname / length incl. trailing zero */ |
| 1041 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 1042 | { |
| 1043 | remote_fileio_ioerror (); |
| 1044 | return; |
| 1045 | } |
| 1046 | /* Request pathname using 'm' packet */ |
| 1047 | pathname = alloca (length); |
| 1048 | if (target_read_memory (ptrval, (gdb_byte *) pathname, length) != 0) |
| 1049 | { |
| 1050 | remote_fileio_ioerror (); |
| 1051 | return; |
| 1052 | } |
| 1053 | |
| 1054 | /* Only operate on regular files (and directories, which allows to return |
| 1055 | the correct return code). */ |
| 1056 | if (!stat (pathname, &st) && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) |
| 1057 | { |
| 1058 | remote_fileio_reply (-1, FILEIO_ENODEV); |
| 1059 | return; |
| 1060 | } |
| 1061 | |
| 1062 | remote_fio_no_longjmp = 1; |
| 1063 | ret = unlink (pathname); |
| 1064 | |
| 1065 | if (ret == -1) |
| 1066 | remote_fileio_return_errno (-1); |
| 1067 | else |
| 1068 | remote_fileio_return_success (ret); |
| 1069 | } |
| 1070 | |
| 1071 | static void |
| 1072 | remote_fileio_func_stat (char *buf) |
| 1073 | { |
| 1074 | CORE_ADDR statptr, nameptr; |
| 1075 | int ret, namelength; |
| 1076 | char *pathname; |
| 1077 | LONGEST lnum; |
| 1078 | struct stat st; |
| 1079 | struct fio_stat fst; |
| 1080 | |
| 1081 | /* 1. Parameter: Ptr to pathname / length incl. trailing zero */ |
| 1082 | if (remote_fileio_extract_ptr_w_len (&buf, &nameptr, &namelength)) |
| 1083 | { |
| 1084 | remote_fileio_ioerror (); |
| 1085 | return; |
| 1086 | } |
| 1087 | |
| 1088 | /* 2. Parameter: Ptr to struct stat */ |
| 1089 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 1090 | { |
| 1091 | remote_fileio_ioerror (); |
| 1092 | return; |
| 1093 | } |
| 1094 | statptr = (CORE_ADDR) lnum; |
| 1095 | |
| 1096 | /* Request pathname using 'm' packet */ |
| 1097 | pathname = alloca (namelength); |
| 1098 | if (target_read_memory (nameptr, (gdb_byte *) pathname, namelength) != 0) |
| 1099 | { |
| 1100 | remote_fileio_ioerror (); |
| 1101 | return; |
| 1102 | } |
| 1103 | |
| 1104 | remote_fio_no_longjmp = 1; |
| 1105 | ret = stat (pathname, &st); |
| 1106 | |
| 1107 | if (ret == -1) |
| 1108 | { |
| 1109 | remote_fileio_return_errno (-1); |
| 1110 | return; |
| 1111 | } |
| 1112 | /* Only operate on regular files and directories. */ |
| 1113 | if (!ret && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) |
| 1114 | { |
| 1115 | remote_fileio_reply (-1, FILEIO_EACCES); |
| 1116 | return; |
| 1117 | } |
| 1118 | if (statptr) |
| 1119 | { |
| 1120 | remote_fileio_to_fio_stat (&st, &fst); |
| 1121 | remote_fileio_to_fio_uint (0, fst.fst_dev); |
| 1122 | |
| 1123 | errno = target_write_memory (statptr, (gdb_byte *) &fst, sizeof fst); |
| 1124 | if (errno != 0) |
| 1125 | { |
| 1126 | remote_fileio_return_errno (-1); |
| 1127 | return; |
| 1128 | } |
| 1129 | } |
| 1130 | remote_fileio_return_success (ret); |
| 1131 | } |
| 1132 | |
| 1133 | static void |
| 1134 | remote_fileio_func_fstat (char *buf) |
| 1135 | { |
| 1136 | CORE_ADDR ptrval; |
| 1137 | int fd, ret; |
| 1138 | long target_fd; |
| 1139 | LONGEST lnum; |
| 1140 | struct stat st; |
| 1141 | struct fio_stat fst; |
| 1142 | struct timeval tv; |
| 1143 | |
| 1144 | /* 1. Parameter: file descriptor */ |
| 1145 | if (remote_fileio_extract_int (&buf, &target_fd)) |
| 1146 | { |
| 1147 | remote_fileio_ioerror (); |
| 1148 | return; |
| 1149 | } |
| 1150 | fd = remote_fileio_map_fd ((int) target_fd); |
| 1151 | if (fd == FIO_FD_INVALID) |
| 1152 | { |
| 1153 | remote_fileio_badfd (); |
| 1154 | return; |
| 1155 | } |
| 1156 | /* 2. Parameter: Ptr to struct stat */ |
| 1157 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 1158 | { |
| 1159 | remote_fileio_ioerror (); |
| 1160 | return; |
| 1161 | } |
| 1162 | ptrval = (CORE_ADDR) lnum; |
| 1163 | |
| 1164 | remote_fio_no_longjmp = 1; |
| 1165 | if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) |
| 1166 | { |
| 1167 | remote_fileio_to_fio_uint (1, fst.fst_dev); |
| 1168 | memset (&st, 0, sizeof (st)); |
| 1169 | st.st_mode = S_IFCHR | (fd == FIO_FD_CONSOLE_IN ? S_IRUSR : S_IWUSR); |
| 1170 | st.st_nlink = 1; |
| 1171 | #ifdef HAVE_GETUID |
| 1172 | st.st_uid = getuid (); |
| 1173 | #endif |
| 1174 | #ifdef HAVE_GETGID |
| 1175 | st.st_gid = getgid (); |
| 1176 | #endif |
| 1177 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
| 1178 | st.st_blksize = 512; |
| 1179 | #endif |
| 1180 | #if HAVE_STRUCT_STAT_ST_BLOCKS |
| 1181 | st.st_blocks = 0; |
| 1182 | #endif |
| 1183 | if (!gettimeofday (&tv, NULL)) |
| 1184 | st.st_atime = st.st_mtime = st.st_ctime = tv.tv_sec; |
| 1185 | else |
| 1186 | st.st_atime = st.st_mtime = st.st_ctime = (time_t) 0; |
| 1187 | ret = 0; |
| 1188 | } |
| 1189 | else |
| 1190 | ret = fstat (fd, &st); |
| 1191 | |
| 1192 | if (ret == -1) |
| 1193 | { |
| 1194 | remote_fileio_return_errno (-1); |
| 1195 | return; |
| 1196 | } |
| 1197 | if (ptrval) |
| 1198 | { |
| 1199 | remote_fileio_to_fio_stat (&st, &fst); |
| 1200 | |
| 1201 | errno = target_write_memory (ptrval, (gdb_byte *) &fst, sizeof fst); |
| 1202 | if (errno != 0) |
| 1203 | { |
| 1204 | remote_fileio_return_errno (-1); |
| 1205 | return; |
| 1206 | } |
| 1207 | } |
| 1208 | remote_fileio_return_success (ret); |
| 1209 | } |
| 1210 | |
| 1211 | static void |
| 1212 | remote_fileio_func_gettimeofday (char *buf) |
| 1213 | { |
| 1214 | LONGEST lnum; |
| 1215 | CORE_ADDR ptrval; |
| 1216 | int ret; |
| 1217 | struct timeval tv; |
| 1218 | struct fio_timeval ftv; |
| 1219 | |
| 1220 | /* 1. Parameter: struct timeval pointer */ |
| 1221 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 1222 | { |
| 1223 | remote_fileio_ioerror (); |
| 1224 | return; |
| 1225 | } |
| 1226 | ptrval = (CORE_ADDR) lnum; |
| 1227 | /* 2. Parameter: some pointer value... */ |
| 1228 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 1229 | { |
| 1230 | remote_fileio_ioerror (); |
| 1231 | return; |
| 1232 | } |
| 1233 | /* ...which has to be NULL. */ |
| 1234 | if (lnum) |
| 1235 | { |
| 1236 | remote_fileio_reply (-1, FILEIO_EINVAL); |
| 1237 | return; |
| 1238 | } |
| 1239 | |
| 1240 | remote_fio_no_longjmp = 1; |
| 1241 | ret = gettimeofday (&tv, NULL); |
| 1242 | |
| 1243 | if (ret == -1) |
| 1244 | { |
| 1245 | remote_fileio_return_errno (-1); |
| 1246 | return; |
| 1247 | } |
| 1248 | |
| 1249 | if (ptrval) |
| 1250 | { |
| 1251 | remote_fileio_to_fio_timeval (&tv, &ftv); |
| 1252 | |
| 1253 | errno = target_write_memory (ptrval, (gdb_byte *) &ftv, sizeof ftv); |
| 1254 | if (errno != 0) |
| 1255 | { |
| 1256 | remote_fileio_return_errno (-1); |
| 1257 | return; |
| 1258 | } |
| 1259 | } |
| 1260 | remote_fileio_return_success (ret); |
| 1261 | } |
| 1262 | |
| 1263 | static void |
| 1264 | remote_fileio_func_isatty (char *buf) |
| 1265 | { |
| 1266 | long target_fd; |
| 1267 | int fd; |
| 1268 | |
| 1269 | /* Parameter: file descriptor */ |
| 1270 | if (remote_fileio_extract_int (&buf, &target_fd)) |
| 1271 | { |
| 1272 | remote_fileio_ioerror (); |
| 1273 | return; |
| 1274 | } |
| 1275 | remote_fio_no_longjmp = 1; |
| 1276 | fd = remote_fileio_map_fd ((int) target_fd); |
| 1277 | remote_fileio_return_success (fd == FIO_FD_CONSOLE_IN || |
| 1278 | fd == FIO_FD_CONSOLE_OUT ? 1 : 0); |
| 1279 | } |
| 1280 | |
| 1281 | static void |
| 1282 | remote_fileio_func_system (char *buf) |
| 1283 | { |
| 1284 | CORE_ADDR ptrval; |
| 1285 | int ret, length; |
| 1286 | char *cmdline = NULL; |
| 1287 | |
| 1288 | /* Parameter: Ptr to commandline / length incl. trailing zero */ |
| 1289 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 1290 | { |
| 1291 | remote_fileio_ioerror (); |
| 1292 | return; |
| 1293 | } |
| 1294 | |
| 1295 | if (length) |
| 1296 | { |
| 1297 | /* Request commandline using 'm' packet */ |
| 1298 | cmdline = alloca (length); |
| 1299 | if (target_read_memory (ptrval, (gdb_byte *) cmdline, length) != 0) |
| 1300 | { |
| 1301 | remote_fileio_ioerror (); |
| 1302 | return; |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | /* Check if system(3) has been explicitely allowed using the |
| 1307 | `set remote system-call-allowed 1' command. If length is 0, |
| 1308 | indicating a NULL parameter to the system call, return zero to |
| 1309 | indicate a shell is not available. Otherwise fail with EPERM. */ |
| 1310 | if (!remote_fio_system_call_allowed) |
| 1311 | { |
| 1312 | if (!length) |
| 1313 | remote_fileio_return_success (0); |
| 1314 | else |
| 1315 | remote_fileio_reply (-1, FILEIO_EPERM); |
| 1316 | return; |
| 1317 | } |
| 1318 | |
| 1319 | remote_fio_no_longjmp = 1; |
| 1320 | ret = system (cmdline); |
| 1321 | |
| 1322 | if (!length) |
| 1323 | remote_fileio_return_success (ret); |
| 1324 | else if (ret == -1) |
| 1325 | remote_fileio_return_errno (-1); |
| 1326 | else |
| 1327 | remote_fileio_return_success (WEXITSTATUS (ret)); |
| 1328 | } |
| 1329 | |
| 1330 | static struct { |
| 1331 | char *name; |
| 1332 | void (*func)(char *); |
| 1333 | } remote_fio_func_map[] = { |
| 1334 | { "open", remote_fileio_func_open }, |
| 1335 | { "close", remote_fileio_func_close }, |
| 1336 | { "read", remote_fileio_func_read }, |
| 1337 | { "write", remote_fileio_func_write }, |
| 1338 | { "lseek", remote_fileio_func_lseek }, |
| 1339 | { "rename", remote_fileio_func_rename }, |
| 1340 | { "unlink", remote_fileio_func_unlink }, |
| 1341 | { "stat", remote_fileio_func_stat }, |
| 1342 | { "fstat", remote_fileio_func_fstat }, |
| 1343 | { "gettimeofday", remote_fileio_func_gettimeofday }, |
| 1344 | { "isatty", remote_fileio_func_isatty }, |
| 1345 | { "system", remote_fileio_func_system }, |
| 1346 | { NULL, NULL } |
| 1347 | }; |
| 1348 | |
| 1349 | static int |
| 1350 | do_remote_fileio_request (struct ui_out *uiout, void *buf_arg) |
| 1351 | { |
| 1352 | char *buf = buf_arg; |
| 1353 | char *c; |
| 1354 | int idx; |
| 1355 | |
| 1356 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); |
| 1357 | |
| 1358 | c = strchr (++buf, ','); |
| 1359 | if (c) |
| 1360 | *c++ = '\0'; |
| 1361 | else |
| 1362 | c = strchr (buf, '\0'); |
| 1363 | for (idx = 0; remote_fio_func_map[idx].name; ++idx) |
| 1364 | if (!strcmp (remote_fio_func_map[idx].name, buf)) |
| 1365 | break; |
| 1366 | if (!remote_fio_func_map[idx].name) /* ERROR: No such function. */ |
| 1367 | return RETURN_ERROR; |
| 1368 | remote_fio_func_map[idx].func (c); |
| 1369 | return 0; |
| 1370 | } |
| 1371 | |
| 1372 | /* Close any open descriptors, and reinitialize the file mapping. */ |
| 1373 | |
| 1374 | void |
| 1375 | remote_fileio_reset (void) |
| 1376 | { |
| 1377 | int ix; |
| 1378 | |
| 1379 | for (ix = 0; ix != remote_fio_data.fd_map_size; ix++) |
| 1380 | { |
| 1381 | int fd = remote_fio_data.fd_map[ix]; |
| 1382 | |
| 1383 | if (fd >= 0) |
| 1384 | close (fd); |
| 1385 | } |
| 1386 | if (remote_fio_data.fd_map) |
| 1387 | { |
| 1388 | xfree (remote_fio_data.fd_map); |
| 1389 | remote_fio_data.fd_map = NULL; |
| 1390 | remote_fio_data.fd_map_size = 0; |
| 1391 | } |
| 1392 | } |
| 1393 | |
| 1394 | /* Handle a file I/O request. BUF points to the packet containing the |
| 1395 | request. CTRLC_PENDING_P should be nonzero if the target has not |
| 1396 | acknowledged the Ctrl-C sent asynchronously earlier. */ |
| 1397 | |
| 1398 | void |
| 1399 | remote_fileio_request (char *buf, int ctrlc_pending_p) |
| 1400 | { |
| 1401 | int ex; |
| 1402 | |
| 1403 | remote_fileio_sig_init (); |
| 1404 | |
| 1405 | if (ctrlc_pending_p) |
| 1406 | { |
| 1407 | /* If the target hasn't responded to the Ctrl-C sent |
| 1408 | asynchronously earlier, take this opportunity to send the |
| 1409 | Ctrl-C synchronously. */ |
| 1410 | remote_fio_ctrl_c_flag = 1; |
| 1411 | remote_fio_no_longjmp = 0; |
| 1412 | remote_fileio_reply (-1, FILEIO_EINTR); |
| 1413 | } |
| 1414 | else |
| 1415 | { |
| 1416 | remote_fio_ctrl_c_flag = 0; |
| 1417 | remote_fio_no_longjmp = 0; |
| 1418 | |
| 1419 | ex = catch_exceptions (current_uiout, |
| 1420 | do_remote_fileio_request, (void *)buf, |
| 1421 | RETURN_MASK_ALL); |
| 1422 | switch (ex) |
| 1423 | { |
| 1424 | case RETURN_ERROR: |
| 1425 | remote_fileio_reply (-1, FILEIO_ENOSYS); |
| 1426 | break; |
| 1427 | case RETURN_QUIT: |
| 1428 | remote_fileio_reply (-1, FILEIO_EINTR); |
| 1429 | break; |
| 1430 | default: |
| 1431 | break; |
| 1432 | } |
| 1433 | } |
| 1434 | |
| 1435 | remote_fileio_sig_exit (); |
| 1436 | } |
| 1437 | |
| 1438 | static void |
| 1439 | set_system_call_allowed (char *args, int from_tty) |
| 1440 | { |
| 1441 | if (args) |
| 1442 | { |
| 1443 | char *arg_end; |
| 1444 | int val = strtoul (args, &arg_end, 10); |
| 1445 | |
| 1446 | if (*args && *arg_end == '\0') |
| 1447 | { |
| 1448 | remote_fio_system_call_allowed = !!val; |
| 1449 | return; |
| 1450 | } |
| 1451 | } |
| 1452 | error (_("Illegal argument for \"set remote system-call-allowed\" command")); |
| 1453 | } |
| 1454 | |
| 1455 | static void |
| 1456 | show_system_call_allowed (char *args, int from_tty) |
| 1457 | { |
| 1458 | if (args) |
| 1459 | error (_("Garbage after \"show remote " |
| 1460 | "system-call-allowed\" command: `%s'"), args); |
| 1461 | printf_unfiltered ("Calling host system(3) call from target is %sallowed\n", |
| 1462 | remote_fio_system_call_allowed ? "" : "not "); |
| 1463 | } |
| 1464 | |
| 1465 | void |
| 1466 | initialize_remote_fileio (struct cmd_list_element *remote_set_cmdlist, |
| 1467 | struct cmd_list_element *remote_show_cmdlist) |
| 1468 | { |
| 1469 | sigint_fileio_token = |
| 1470 | create_async_signal_handler (async_remote_fileio_interrupt, NULL); |
| 1471 | |
| 1472 | add_cmd ("system-call-allowed", no_class, |
| 1473 | set_system_call_allowed, |
| 1474 | _("Set if the host system(3) call is allowed for the target."), |
| 1475 | &remote_set_cmdlist); |
| 1476 | add_cmd ("system-call-allowed", no_class, |
| 1477 | show_system_call_allowed, |
| 1478 | _("Show if the host system(3) call is allowed for the target."), |
| 1479 | &remote_show_cmdlist); |
| 1480 | } |