| 1 | /* Remote File-I/O communications |
| 2 | |
| 3 | Copyright 2003 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 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | /* See the GDB User Guide for details of the GDB remote protocol. */ |
| 23 | |
| 24 | #include "defs.h" |
| 25 | #include "gdb_string.h" |
| 26 | #include "gdbcmd.h" |
| 27 | #include "remote.h" |
| 28 | #include "gdb/fileio.h" |
| 29 | #include "gdb_wait.h" |
| 30 | #include "gdb_stat.h" |
| 31 | #include "exceptions.h" |
| 32 | #include "remote-fileio.h" |
| 33 | |
| 34 | #include <fcntl.h> |
| 35 | #include <sys/time.h> |
| 36 | #ifdef __CYGWIN__ |
| 37 | #include <sys/cygwin.h> /* For cygwin_conv_to_full_posix_path. */ |
| 38 | #endif |
| 39 | #include <signal.h> |
| 40 | |
| 41 | static struct { |
| 42 | int *fd_map; |
| 43 | int fd_map_size; |
| 44 | } remote_fio_data; |
| 45 | |
| 46 | #define FIO_FD_INVALID -1 |
| 47 | #define FIO_FD_CONSOLE_IN -2 |
| 48 | #define FIO_FD_CONSOLE_OUT -3 |
| 49 | |
| 50 | static int remote_fio_system_call_allowed = 0; |
| 51 | |
| 52 | static int |
| 53 | remote_fileio_init_fd_map (void) |
| 54 | { |
| 55 | int i; |
| 56 | |
| 57 | if (!remote_fio_data.fd_map) |
| 58 | { |
| 59 | remote_fio_data.fd_map = (int *) xmalloc (10 * sizeof (int)); |
| 60 | remote_fio_data.fd_map_size = 10; |
| 61 | remote_fio_data.fd_map[0] = FIO_FD_CONSOLE_IN; |
| 62 | remote_fio_data.fd_map[1] = FIO_FD_CONSOLE_OUT; |
| 63 | remote_fio_data.fd_map[2] = FIO_FD_CONSOLE_OUT; |
| 64 | for (i = 3; i < 10; ++i) |
| 65 | remote_fio_data.fd_map[i] = FIO_FD_INVALID; |
| 66 | } |
| 67 | return 3; |
| 68 | } |
| 69 | |
| 70 | static int |
| 71 | remote_fileio_resize_fd_map (void) |
| 72 | { |
| 73 | if (!remote_fio_data.fd_map) |
| 74 | return remote_fileio_init_fd_map (); |
| 75 | remote_fio_data.fd_map_size += 10; |
| 76 | remote_fio_data.fd_map = |
| 77 | (int *) xrealloc (remote_fio_data.fd_map, |
| 78 | remote_fio_data.fd_map_size * sizeof (int)); |
| 79 | return remote_fio_data.fd_map_size - 10; |
| 80 | } |
| 81 | |
| 82 | static int |
| 83 | remote_fileio_next_free_fd (void) |
| 84 | { |
| 85 | int i; |
| 86 | |
| 87 | for (i = 0; i < remote_fio_data.fd_map_size; ++i) |
| 88 | if (remote_fio_data.fd_map[i] == FIO_FD_INVALID) |
| 89 | return i; |
| 90 | return remote_fileio_resize_fd_map (); |
| 91 | } |
| 92 | |
| 93 | static int |
| 94 | remote_fileio_fd_to_targetfd (int fd) |
| 95 | { |
| 96 | int target_fd = remote_fileio_next_free_fd (); |
| 97 | remote_fio_data.fd_map[target_fd] = fd; |
| 98 | return target_fd; |
| 99 | } |
| 100 | |
| 101 | static int |
| 102 | remote_fileio_map_fd (int target_fd) |
| 103 | { |
| 104 | remote_fileio_init_fd_map (); |
| 105 | if (target_fd < 0 || target_fd >= remote_fio_data.fd_map_size) |
| 106 | return FIO_FD_INVALID; |
| 107 | return remote_fio_data.fd_map[target_fd]; |
| 108 | } |
| 109 | |
| 110 | static void |
| 111 | remote_fileio_close_target_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 | remote_fio_data.fd_map[target_fd] = FIO_FD_INVALID; |
| 116 | } |
| 117 | |
| 118 | static int |
| 119 | remote_fileio_oflags_to_host (long flags) |
| 120 | { |
| 121 | int hflags = 0; |
| 122 | |
| 123 | if (flags & FILEIO_O_CREAT) |
| 124 | hflags |= O_CREAT; |
| 125 | if (flags & FILEIO_O_EXCL) |
| 126 | hflags |= O_EXCL; |
| 127 | if (flags & FILEIO_O_TRUNC) |
| 128 | hflags |= O_TRUNC; |
| 129 | if (flags & FILEIO_O_APPEND) |
| 130 | hflags |= O_APPEND; |
| 131 | if (flags & FILEIO_O_RDONLY) |
| 132 | hflags |= O_RDONLY; |
| 133 | if (flags & FILEIO_O_WRONLY) |
| 134 | hflags |= O_WRONLY; |
| 135 | if (flags & FILEIO_O_RDWR) |
| 136 | hflags |= O_RDWR; |
| 137 | /* On systems supporting binary and text mode, always open files in |
| 138 | binary mode. */ |
| 139 | #ifdef O_BINARY |
| 140 | hflags |= O_BINARY; |
| 141 | #endif |
| 142 | return hflags; |
| 143 | } |
| 144 | |
| 145 | static mode_t |
| 146 | remote_fileio_mode_to_host (long mode, int open_call) |
| 147 | { |
| 148 | mode_t hmode = 0; |
| 149 | |
| 150 | if (!open_call) |
| 151 | { |
| 152 | if (mode & FILEIO_S_IFREG) |
| 153 | hmode |= S_IFREG; |
| 154 | if (mode & FILEIO_S_IFDIR) |
| 155 | hmode |= S_IFDIR; |
| 156 | if (mode & FILEIO_S_IFCHR) |
| 157 | hmode |= S_IFCHR; |
| 158 | } |
| 159 | if (mode & FILEIO_S_IRUSR) |
| 160 | hmode |= S_IRUSR; |
| 161 | if (mode & FILEIO_S_IWUSR) |
| 162 | hmode |= S_IWUSR; |
| 163 | if (mode & FILEIO_S_IXUSR) |
| 164 | hmode |= S_IXUSR; |
| 165 | if (mode & FILEIO_S_IRGRP) |
| 166 | hmode |= S_IRGRP; |
| 167 | if (mode & FILEIO_S_IWGRP) |
| 168 | hmode |= S_IWGRP; |
| 169 | if (mode & FILEIO_S_IXGRP) |
| 170 | hmode |= S_IXGRP; |
| 171 | if (mode & FILEIO_S_IROTH) |
| 172 | hmode |= S_IROTH; |
| 173 | if (mode & FILEIO_S_IWOTH) |
| 174 | hmode |= S_IWOTH; |
| 175 | if (mode & FILEIO_S_IXOTH) |
| 176 | hmode |= S_IXOTH; |
| 177 | return hmode; |
| 178 | } |
| 179 | |
| 180 | static LONGEST |
| 181 | remote_fileio_mode_to_target (mode_t mode) |
| 182 | { |
| 183 | mode_t tmode = 0; |
| 184 | |
| 185 | if (mode & S_IFREG) |
| 186 | tmode |= FILEIO_S_IFREG; |
| 187 | if (mode & S_IFDIR) |
| 188 | tmode |= FILEIO_S_IFDIR; |
| 189 | if (mode & S_IFCHR) |
| 190 | tmode |= FILEIO_S_IFCHR; |
| 191 | if (mode & S_IRUSR) |
| 192 | tmode |= FILEIO_S_IRUSR; |
| 193 | if (mode & S_IWUSR) |
| 194 | tmode |= FILEIO_S_IWUSR; |
| 195 | if (mode & S_IXUSR) |
| 196 | tmode |= FILEIO_S_IXUSR; |
| 197 | if (mode & S_IRGRP) |
| 198 | tmode |= FILEIO_S_IRGRP; |
| 199 | if (mode & S_IWGRP) |
| 200 | tmode |= FILEIO_S_IWGRP; |
| 201 | if (mode & S_IXGRP) |
| 202 | tmode |= FILEIO_S_IXGRP; |
| 203 | if (mode & S_IROTH) |
| 204 | tmode |= FILEIO_S_IROTH; |
| 205 | if (mode & S_IWOTH) |
| 206 | tmode |= FILEIO_S_IWOTH; |
| 207 | if (mode & S_IXOTH) |
| 208 | tmode |= FILEIO_S_IXOTH; |
| 209 | return tmode; |
| 210 | } |
| 211 | |
| 212 | static int |
| 213 | remote_fileio_errno_to_target (int error) |
| 214 | { |
| 215 | switch (error) |
| 216 | { |
| 217 | case EPERM: |
| 218 | return FILEIO_EPERM; |
| 219 | case ENOENT: |
| 220 | return FILEIO_ENOENT; |
| 221 | case EINTR: |
| 222 | return FILEIO_EINTR; |
| 223 | case EIO: |
| 224 | return FILEIO_EIO; |
| 225 | case EBADF: |
| 226 | return FILEIO_EBADF; |
| 227 | case EACCES: |
| 228 | return FILEIO_EACCES; |
| 229 | case EFAULT: |
| 230 | return FILEIO_EFAULT; |
| 231 | case EBUSY: |
| 232 | return FILEIO_EBUSY; |
| 233 | case EEXIST: |
| 234 | return FILEIO_EEXIST; |
| 235 | case ENODEV: |
| 236 | return FILEIO_ENODEV; |
| 237 | case ENOTDIR: |
| 238 | return FILEIO_ENOTDIR; |
| 239 | case EISDIR: |
| 240 | return FILEIO_EISDIR; |
| 241 | case EINVAL: |
| 242 | return FILEIO_EINVAL; |
| 243 | case ENFILE: |
| 244 | return FILEIO_ENFILE; |
| 245 | case EMFILE: |
| 246 | return FILEIO_EMFILE; |
| 247 | case EFBIG: |
| 248 | return FILEIO_EFBIG; |
| 249 | case ENOSPC: |
| 250 | return FILEIO_ENOSPC; |
| 251 | case ESPIPE: |
| 252 | return FILEIO_ESPIPE; |
| 253 | case EROFS: |
| 254 | return FILEIO_EROFS; |
| 255 | case ENOSYS: |
| 256 | return FILEIO_ENOSYS; |
| 257 | case ENAMETOOLONG: |
| 258 | return FILEIO_ENAMETOOLONG; |
| 259 | } |
| 260 | return FILEIO_EUNKNOWN; |
| 261 | } |
| 262 | |
| 263 | static int |
| 264 | remote_fileio_seek_flag_to_host (long num, int *flag) |
| 265 | { |
| 266 | if (!flag) |
| 267 | return 0; |
| 268 | switch (num) |
| 269 | { |
| 270 | case FILEIO_SEEK_SET: |
| 271 | *flag = SEEK_SET; |
| 272 | break; |
| 273 | case FILEIO_SEEK_CUR: |
| 274 | *flag = SEEK_CUR; |
| 275 | break; |
| 276 | case FILEIO_SEEK_END: |
| 277 | *flag = SEEK_END; |
| 278 | break; |
| 279 | default: |
| 280 | return -1; |
| 281 | } |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | static int |
| 286 | remote_fileio_extract_long (char **buf, LONGEST *retlong) |
| 287 | { |
| 288 | char *c; |
| 289 | int sign = 1; |
| 290 | |
| 291 | if (!buf || !*buf || !**buf || !retlong) |
| 292 | return -1; |
| 293 | c = strchr (*buf, ','); |
| 294 | if (c) |
| 295 | *c++ = '\0'; |
| 296 | else |
| 297 | c = strchr (*buf, '\0'); |
| 298 | while (strchr ("+-", **buf)) |
| 299 | { |
| 300 | if (**buf == '-') |
| 301 | sign = -sign; |
| 302 | ++*buf; |
| 303 | } |
| 304 | for (*retlong = 0; **buf; ++*buf) |
| 305 | { |
| 306 | *retlong <<= 4; |
| 307 | if (**buf >= '0' && **buf <= '9') |
| 308 | *retlong += **buf - '0'; |
| 309 | else if (**buf >= 'a' && **buf <= 'f') |
| 310 | *retlong += **buf - 'a' + 10; |
| 311 | else if (**buf >= 'A' && **buf <= 'F') |
| 312 | *retlong += **buf - 'A' + 10; |
| 313 | else |
| 314 | return -1; |
| 315 | } |
| 316 | *retlong *= sign; |
| 317 | *buf = c; |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | static int |
| 322 | remote_fileio_extract_int (char **buf, long *retint) |
| 323 | { |
| 324 | int ret; |
| 325 | LONGEST retlong; |
| 326 | |
| 327 | if (!retint) |
| 328 | return -1; |
| 329 | ret = remote_fileio_extract_long (buf, &retlong); |
| 330 | if (!ret) |
| 331 | *retint = (long) retlong; |
| 332 | return ret; |
| 333 | } |
| 334 | |
| 335 | static int |
| 336 | remote_fileio_extract_ptr_w_len (char **buf, CORE_ADDR *ptrval, int *length) |
| 337 | { |
| 338 | char *c; |
| 339 | LONGEST retlong; |
| 340 | |
| 341 | if (!buf || !*buf || !**buf || !ptrval || !length) |
| 342 | return -1; |
| 343 | c = strchr (*buf, '/'); |
| 344 | if (!c) |
| 345 | return -1; |
| 346 | *c++ = '\0'; |
| 347 | if (remote_fileio_extract_long (buf, &retlong)) |
| 348 | return -1; |
| 349 | *ptrval = (CORE_ADDR) retlong; |
| 350 | *buf = c; |
| 351 | if (remote_fileio_extract_long (buf, &retlong)) |
| 352 | return -1; |
| 353 | *length = (int) retlong; |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | /* Convert to big endian */ |
| 358 | static void |
| 359 | remote_fileio_to_be (LONGEST num, char *buf, int bytes) |
| 360 | { |
| 361 | int i; |
| 362 | |
| 363 | for (i = 0; i < bytes; ++i) |
| 364 | buf[i] = (num >> (8 * (bytes - i - 1))) & 0xff; |
| 365 | } |
| 366 | |
| 367 | static void |
| 368 | remote_fileio_to_fio_uint (long num, fio_uint_t fnum) |
| 369 | { |
| 370 | remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); |
| 371 | } |
| 372 | |
| 373 | static void |
| 374 | remote_fileio_to_fio_mode (mode_t num, fio_mode_t fnum) |
| 375 | { |
| 376 | remote_fileio_to_be (remote_fileio_mode_to_target(num), (char *) fnum, 4); |
| 377 | } |
| 378 | |
| 379 | static void |
| 380 | remote_fileio_to_fio_time (time_t num, fio_time_t fnum) |
| 381 | { |
| 382 | remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); |
| 383 | } |
| 384 | |
| 385 | static void |
| 386 | remote_fileio_to_fio_long (LONGEST num, fio_long_t fnum) |
| 387 | { |
| 388 | remote_fileio_to_be (num, (char *) fnum, 8); |
| 389 | } |
| 390 | |
| 391 | static void |
| 392 | remote_fileio_to_fio_ulong (LONGEST num, fio_ulong_t fnum) |
| 393 | { |
| 394 | remote_fileio_to_be (num, (char *) fnum, 8); |
| 395 | } |
| 396 | |
| 397 | static void |
| 398 | remote_fileio_to_fio_stat (struct stat *st, struct fio_stat *fst) |
| 399 | { |
| 400 | /* `st_dev' is set in the calling function */ |
| 401 | remote_fileio_to_fio_uint ((long) st->st_ino, fst->fst_ino); |
| 402 | remote_fileio_to_fio_mode (st->st_mode, fst->fst_mode); |
| 403 | remote_fileio_to_fio_uint ((long) st->st_nlink, fst->fst_nlink); |
| 404 | remote_fileio_to_fio_uint ((long) st->st_uid, fst->fst_uid); |
| 405 | remote_fileio_to_fio_uint ((long) st->st_gid, fst->fst_gid); |
| 406 | remote_fileio_to_fio_uint ((long) st->st_rdev, fst->fst_rdev); |
| 407 | remote_fileio_to_fio_ulong ((LONGEST) st->st_size, fst->fst_size); |
| 408 | remote_fileio_to_fio_ulong ((LONGEST) st->st_blksize, fst->fst_blksize); |
| 409 | #if HAVE_STRUCT_STAT_ST_BLOCKS |
| 410 | remote_fileio_to_fio_ulong ((LONGEST) st->st_blocks, fst->fst_blocks); |
| 411 | #else |
| 412 | /* FIXME: This is correct for DJGPP, but other systems that don't |
| 413 | have st_blocks, if any, might prefer 512 instead of st_blksize. |
| 414 | (eliz, 30-12-2003) */ |
| 415 | remote_fileio_to_fio_ulong (((LONGEST) st->st_size + st->st_blksize - 1) |
| 416 | / (LONGEST) st->st_blksize, |
| 417 | fst->fst_blocks); |
| 418 | #endif |
| 419 | remote_fileio_to_fio_time (st->st_atime, fst->fst_atime); |
| 420 | remote_fileio_to_fio_time (st->st_mtime, fst->fst_mtime); |
| 421 | remote_fileio_to_fio_time (st->st_ctime, fst->fst_ctime); |
| 422 | } |
| 423 | |
| 424 | static void |
| 425 | remote_fileio_to_fio_timeval (struct timeval *tv, struct fio_timeval *ftv) |
| 426 | { |
| 427 | remote_fileio_to_fio_time (tv->tv_sec, ftv->ftv_sec); |
| 428 | remote_fileio_to_fio_long (tv->tv_usec, ftv->ftv_usec); |
| 429 | } |
| 430 | |
| 431 | static int remote_fio_ctrl_c_flag = 0; |
| 432 | static int remote_fio_no_longjmp = 0; |
| 433 | |
| 434 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 435 | static struct sigaction remote_fio_sa; |
| 436 | static struct sigaction remote_fio_osa; |
| 437 | #else |
| 438 | static void (*remote_fio_ofunc)(int); |
| 439 | #endif |
| 440 | |
| 441 | static void |
| 442 | remote_fileio_sig_init (void) |
| 443 | { |
| 444 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 445 | remote_fio_sa.sa_handler = SIG_IGN; |
| 446 | sigemptyset (&remote_fio_sa.sa_mask); |
| 447 | remote_fio_sa.sa_flags = 0; |
| 448 | sigaction (SIGINT, &remote_fio_sa, &remote_fio_osa); |
| 449 | #else |
| 450 | remote_fio_ofunc = signal (SIGINT, SIG_IGN); |
| 451 | #endif |
| 452 | } |
| 453 | |
| 454 | static void |
| 455 | remote_fileio_sig_set (void (*sigint_func)(int)) |
| 456 | { |
| 457 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 458 | remote_fio_sa.sa_handler = sigint_func; |
| 459 | sigemptyset (&remote_fio_sa.sa_mask); |
| 460 | remote_fio_sa.sa_flags = 0; |
| 461 | sigaction (SIGINT, &remote_fio_sa, NULL); |
| 462 | #else |
| 463 | signal (SIGINT, sigint_func); |
| 464 | #endif |
| 465 | } |
| 466 | |
| 467 | static void |
| 468 | remote_fileio_sig_exit (void) |
| 469 | { |
| 470 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 471 | sigaction (SIGINT, &remote_fio_osa, NULL); |
| 472 | #else |
| 473 | signal (SIGINT, remote_fio_ofunc); |
| 474 | #endif |
| 475 | } |
| 476 | |
| 477 | static void |
| 478 | remote_fileio_ctrl_c_signal_handler (int signo) |
| 479 | { |
| 480 | remote_fileio_sig_set (SIG_IGN); |
| 481 | remote_fio_ctrl_c_flag = 1; |
| 482 | if (!remote_fio_no_longjmp) |
| 483 | deprecated_throw_reason (RETURN_QUIT); |
| 484 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); |
| 485 | } |
| 486 | |
| 487 | static void |
| 488 | remote_fileio_reply (int retcode, int error) |
| 489 | { |
| 490 | char buf[32]; |
| 491 | |
| 492 | remote_fileio_sig_set (SIG_IGN); |
| 493 | strcpy (buf, "F"); |
| 494 | if (retcode < 0) |
| 495 | { |
| 496 | strcat (buf, "-"); |
| 497 | retcode = -retcode; |
| 498 | } |
| 499 | sprintf (buf + strlen (buf), "%x", retcode); |
| 500 | if (error || remote_fio_ctrl_c_flag) |
| 501 | { |
| 502 | if (error && remote_fio_ctrl_c_flag) |
| 503 | error = FILEIO_EINTR; |
| 504 | if (error < 0) |
| 505 | { |
| 506 | strcat (buf, "-"); |
| 507 | error = -error; |
| 508 | } |
| 509 | sprintf (buf + strlen (buf), ",%x", error); |
| 510 | if (remote_fio_ctrl_c_flag) |
| 511 | strcat (buf, ",C"); |
| 512 | } |
| 513 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); |
| 514 | putpkt (buf); |
| 515 | } |
| 516 | |
| 517 | static void |
| 518 | remote_fileio_ioerror (void) |
| 519 | { |
| 520 | remote_fileio_reply (-1, FILEIO_EIO); |
| 521 | } |
| 522 | |
| 523 | static void |
| 524 | remote_fileio_badfd (void) |
| 525 | { |
| 526 | remote_fileio_reply (-1, FILEIO_EBADF); |
| 527 | } |
| 528 | |
| 529 | static void |
| 530 | remote_fileio_return_errno (int retcode) |
| 531 | { |
| 532 | remote_fileio_reply (retcode, |
| 533 | retcode < 0 ? remote_fileio_errno_to_target (errno) : 0); |
| 534 | } |
| 535 | |
| 536 | static void |
| 537 | remote_fileio_return_success (int retcode) |
| 538 | { |
| 539 | remote_fileio_reply (retcode, 0); |
| 540 | } |
| 541 | |
| 542 | /* Wrapper function for remote_write_bytes() which has the disadvantage to |
| 543 | write only one packet, regardless of the requested number of bytes to |
| 544 | transfer. This wrapper calls remote_write_bytes() as often as needed. */ |
| 545 | static int |
| 546 | remote_fileio_write_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
| 547 | { |
| 548 | int ret = 0, written; |
| 549 | |
| 550 | while (len > 0 && (written = remote_write_bytes (memaddr, myaddr, len)) > 0) |
| 551 | { |
| 552 | len -= written; |
| 553 | memaddr += written; |
| 554 | myaddr += written; |
| 555 | ret += written; |
| 556 | } |
| 557 | return ret; |
| 558 | } |
| 559 | |
| 560 | static void |
| 561 | remote_fileio_func_open (char *buf) |
| 562 | { |
| 563 | CORE_ADDR ptrval; |
| 564 | int length, retlength; |
| 565 | long num; |
| 566 | int flags, fd; |
| 567 | mode_t mode; |
| 568 | char *pathname; |
| 569 | struct stat st; |
| 570 | |
| 571 | /* 1. Parameter: Ptr to pathname / length incl. trailing zero */ |
| 572 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 573 | { |
| 574 | remote_fileio_ioerror (); |
| 575 | return; |
| 576 | } |
| 577 | /* 2. Parameter: open flags */ |
| 578 | if (remote_fileio_extract_int (&buf, &num)) |
| 579 | { |
| 580 | remote_fileio_ioerror (); |
| 581 | return; |
| 582 | } |
| 583 | flags = remote_fileio_oflags_to_host (num); |
| 584 | /* 3. Parameter: open mode */ |
| 585 | if (remote_fileio_extract_int (&buf, &num)) |
| 586 | { |
| 587 | remote_fileio_ioerror (); |
| 588 | return; |
| 589 | } |
| 590 | mode = remote_fileio_mode_to_host (num, 1); |
| 591 | |
| 592 | /* Request pathname using 'm' packet */ |
| 593 | pathname = alloca (length); |
| 594 | retlength = remote_read_bytes (ptrval, pathname, length); |
| 595 | if (retlength != length) |
| 596 | { |
| 597 | remote_fileio_ioerror (); |
| 598 | return; |
| 599 | } |
| 600 | |
| 601 | /* Check if pathname exists and is not a regular file or directory. If so, |
| 602 | return an appropriate error code. Same for trying to open directories |
| 603 | for writing. */ |
| 604 | if (!stat (pathname, &st)) |
| 605 | { |
| 606 | if (!S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) |
| 607 | { |
| 608 | remote_fileio_reply (-1, FILEIO_ENODEV); |
| 609 | return; |
| 610 | } |
| 611 | if (S_ISDIR (st.st_mode) |
| 612 | && ((flags & O_WRONLY) == O_WRONLY || (flags & O_RDWR) == O_RDWR)) |
| 613 | { |
| 614 | remote_fileio_reply (-1, FILEIO_EISDIR); |
| 615 | return; |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | remote_fio_no_longjmp = 1; |
| 620 | fd = open (pathname, flags, mode); |
| 621 | if (fd < 0) |
| 622 | { |
| 623 | remote_fileio_return_errno (-1); |
| 624 | return; |
| 625 | } |
| 626 | |
| 627 | fd = remote_fileio_fd_to_targetfd (fd); |
| 628 | remote_fileio_return_success (fd); |
| 629 | } |
| 630 | |
| 631 | static void |
| 632 | remote_fileio_func_close (char *buf) |
| 633 | { |
| 634 | long num; |
| 635 | int fd; |
| 636 | |
| 637 | /* Parameter: file descriptor */ |
| 638 | if (remote_fileio_extract_int (&buf, &num)) |
| 639 | { |
| 640 | remote_fileio_ioerror (); |
| 641 | return; |
| 642 | } |
| 643 | fd = remote_fileio_map_fd ((int) num); |
| 644 | if (fd == FIO_FD_INVALID) |
| 645 | { |
| 646 | remote_fileio_badfd (); |
| 647 | return; |
| 648 | } |
| 649 | |
| 650 | remote_fio_no_longjmp = 1; |
| 651 | if (fd != FIO_FD_CONSOLE_IN && fd != FIO_FD_CONSOLE_OUT && close (fd)) |
| 652 | remote_fileio_return_errno (-1); |
| 653 | remote_fileio_close_target_fd ((int) num); |
| 654 | remote_fileio_return_success (0); |
| 655 | } |
| 656 | |
| 657 | static void |
| 658 | remote_fileio_func_read (char *buf) |
| 659 | { |
| 660 | long target_fd, num; |
| 661 | LONGEST lnum; |
| 662 | CORE_ADDR ptrval; |
| 663 | int fd, ret, retlength; |
| 664 | char *buffer; |
| 665 | size_t length; |
| 666 | off_t old_offset, new_offset; |
| 667 | |
| 668 | /* 1. Parameter: file descriptor */ |
| 669 | if (remote_fileio_extract_int (&buf, &target_fd)) |
| 670 | { |
| 671 | remote_fileio_ioerror (); |
| 672 | return; |
| 673 | } |
| 674 | fd = remote_fileio_map_fd ((int) target_fd); |
| 675 | if (fd == FIO_FD_INVALID) |
| 676 | { |
| 677 | remote_fileio_badfd (); |
| 678 | return; |
| 679 | } |
| 680 | /* 2. Parameter: buffer pointer */ |
| 681 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 682 | { |
| 683 | remote_fileio_ioerror (); |
| 684 | return; |
| 685 | } |
| 686 | ptrval = (CORE_ADDR) lnum; |
| 687 | /* 3. Parameter: buffer length */ |
| 688 | if (remote_fileio_extract_int (&buf, &num)) |
| 689 | { |
| 690 | remote_fileio_ioerror (); |
| 691 | return; |
| 692 | } |
| 693 | length = (size_t) num; |
| 694 | |
| 695 | switch (fd) |
| 696 | { |
| 697 | case FIO_FD_CONSOLE_OUT: |
| 698 | remote_fileio_badfd (); |
| 699 | return; |
| 700 | case FIO_FD_CONSOLE_IN: |
| 701 | { |
| 702 | static char *remaining_buf = NULL; |
| 703 | static int remaining_length = 0; |
| 704 | |
| 705 | buffer = (char *) xmalloc (32768); |
| 706 | if (remaining_buf) |
| 707 | { |
| 708 | remote_fio_no_longjmp = 1; |
| 709 | if (remaining_length > length) |
| 710 | { |
| 711 | memcpy (buffer, remaining_buf, length); |
| 712 | memmove (remaining_buf, remaining_buf + length, |
| 713 | remaining_length - length); |
| 714 | remaining_length -= length; |
| 715 | ret = length; |
| 716 | } |
| 717 | else |
| 718 | { |
| 719 | memcpy (buffer, remaining_buf, remaining_length); |
| 720 | xfree (remaining_buf); |
| 721 | remaining_buf = NULL; |
| 722 | ret = remaining_length; |
| 723 | } |
| 724 | } |
| 725 | else |
| 726 | { |
| 727 | ret = ui_file_read (gdb_stdtargin, buffer, 32767); |
| 728 | remote_fio_no_longjmp = 1; |
| 729 | if (ret > 0 && (size_t)ret > length) |
| 730 | { |
| 731 | remaining_buf = (char *) xmalloc (ret - length); |
| 732 | remaining_length = ret - length; |
| 733 | memcpy (remaining_buf, buffer + length, remaining_length); |
| 734 | ret = length; |
| 735 | } |
| 736 | } |
| 737 | } |
| 738 | break; |
| 739 | default: |
| 740 | buffer = (char *) xmalloc (length); |
| 741 | /* POSIX defines EINTR behaviour of read in a weird way. It's allowed |
| 742 | for read() to return -1 even if "some" bytes have been read. It |
| 743 | has been corrected in SUSv2 but that doesn't help us much... |
| 744 | Therefore a complete solution must check how many bytes have been |
| 745 | read on EINTR to return a more reliable value to the target */ |
| 746 | old_offset = lseek (fd, 0, SEEK_CUR); |
| 747 | remote_fio_no_longjmp = 1; |
| 748 | ret = read (fd, buffer, length); |
| 749 | if (ret < 0 && errno == EINTR) |
| 750 | { |
| 751 | new_offset = lseek (fd, 0, SEEK_CUR); |
| 752 | /* If some data has been read, return the number of bytes read. |
| 753 | The Ctrl-C flag is set in remote_fileio_reply() anyway */ |
| 754 | if (old_offset != new_offset) |
| 755 | ret = new_offset - old_offset; |
| 756 | } |
| 757 | break; |
| 758 | } |
| 759 | |
| 760 | if (ret > 0) |
| 761 | { |
| 762 | retlength = remote_fileio_write_bytes (ptrval, buffer, ret); |
| 763 | if (retlength != ret) |
| 764 | ret = -1; /* errno has been set to EIO in remote_fileio_write_bytes() */ |
| 765 | } |
| 766 | |
| 767 | if (ret < 0) |
| 768 | remote_fileio_return_errno (-1); |
| 769 | else |
| 770 | remote_fileio_return_success (ret); |
| 771 | |
| 772 | xfree (buffer); |
| 773 | } |
| 774 | |
| 775 | static void |
| 776 | remote_fileio_func_write (char *buf) |
| 777 | { |
| 778 | long target_fd, num; |
| 779 | LONGEST lnum; |
| 780 | CORE_ADDR ptrval; |
| 781 | int fd, ret, retlength; |
| 782 | char *buffer; |
| 783 | size_t length; |
| 784 | |
| 785 | /* 1. Parameter: file descriptor */ |
| 786 | if (remote_fileio_extract_int (&buf, &target_fd)) |
| 787 | { |
| 788 | remote_fileio_ioerror (); |
| 789 | return; |
| 790 | } |
| 791 | fd = remote_fileio_map_fd ((int) target_fd); |
| 792 | if (fd == FIO_FD_INVALID) |
| 793 | { |
| 794 | remote_fileio_badfd (); |
| 795 | return; |
| 796 | } |
| 797 | /* 2. Parameter: buffer pointer */ |
| 798 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 799 | { |
| 800 | remote_fileio_ioerror (); |
| 801 | return; |
| 802 | } |
| 803 | ptrval = (CORE_ADDR) lnum; |
| 804 | /* 3. Parameter: buffer length */ |
| 805 | if (remote_fileio_extract_int (&buf, &num)) |
| 806 | { |
| 807 | remote_fileio_ioerror (); |
| 808 | return; |
| 809 | } |
| 810 | length = (size_t) num; |
| 811 | |
| 812 | buffer = (char *) xmalloc (length); |
| 813 | retlength = remote_read_bytes (ptrval, buffer, length); |
| 814 | if (retlength != length) |
| 815 | { |
| 816 | xfree (buffer); |
| 817 | remote_fileio_ioerror (); |
| 818 | return; |
| 819 | } |
| 820 | |
| 821 | remote_fio_no_longjmp = 1; |
| 822 | switch (fd) |
| 823 | { |
| 824 | case FIO_FD_CONSOLE_IN: |
| 825 | remote_fileio_badfd (); |
| 826 | return; |
| 827 | case FIO_FD_CONSOLE_OUT: |
| 828 | ui_file_write (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr, buffer, |
| 829 | length); |
| 830 | gdb_flush (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr); |
| 831 | ret = length; |
| 832 | break; |
| 833 | default: |
| 834 | ret = write (fd, buffer, length); |
| 835 | if (ret < 0 && errno == EACCES) |
| 836 | errno = EBADF; /* Cygwin returns EACCESS when writing to a R/O file.*/ |
| 837 | break; |
| 838 | } |
| 839 | |
| 840 | if (ret < 0) |
| 841 | remote_fileio_return_errno (-1); |
| 842 | else |
| 843 | remote_fileio_return_success (ret); |
| 844 | |
| 845 | xfree (buffer); |
| 846 | } |
| 847 | |
| 848 | static void |
| 849 | remote_fileio_func_lseek (char *buf) |
| 850 | { |
| 851 | long num; |
| 852 | LONGEST lnum; |
| 853 | int fd, flag; |
| 854 | off_t offset, ret; |
| 855 | |
| 856 | /* 1. Parameter: file descriptor */ |
| 857 | if (remote_fileio_extract_int (&buf, &num)) |
| 858 | { |
| 859 | remote_fileio_ioerror (); |
| 860 | return; |
| 861 | } |
| 862 | fd = remote_fileio_map_fd ((int) num); |
| 863 | if (fd == FIO_FD_INVALID) |
| 864 | { |
| 865 | remote_fileio_badfd (); |
| 866 | return; |
| 867 | } |
| 868 | else if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) |
| 869 | { |
| 870 | remote_fileio_reply (-1, FILEIO_ESPIPE); |
| 871 | return; |
| 872 | } |
| 873 | |
| 874 | /* 2. Parameter: offset */ |
| 875 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 876 | { |
| 877 | remote_fileio_ioerror (); |
| 878 | return; |
| 879 | } |
| 880 | offset = (off_t) lnum; |
| 881 | /* 3. Parameter: flag */ |
| 882 | if (remote_fileio_extract_int (&buf, &num)) |
| 883 | { |
| 884 | remote_fileio_ioerror (); |
| 885 | return; |
| 886 | } |
| 887 | if (remote_fileio_seek_flag_to_host (num, &flag)) |
| 888 | { |
| 889 | remote_fileio_reply (-1, FILEIO_EINVAL); |
| 890 | return; |
| 891 | } |
| 892 | |
| 893 | remote_fio_no_longjmp = 1; |
| 894 | ret = lseek (fd, offset, flag); |
| 895 | |
| 896 | if (ret == (off_t) -1) |
| 897 | remote_fileio_return_errno (-1); |
| 898 | else |
| 899 | remote_fileio_return_success (ret); |
| 900 | } |
| 901 | |
| 902 | static void |
| 903 | remote_fileio_func_rename (char *buf) |
| 904 | { |
| 905 | CORE_ADDR ptrval; |
| 906 | int length, retlength; |
| 907 | char *oldpath, *newpath; |
| 908 | int ret, of, nf; |
| 909 | struct stat ost, nst; |
| 910 | |
| 911 | /* 1. Parameter: Ptr to oldpath / length incl. trailing zero */ |
| 912 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 913 | { |
| 914 | remote_fileio_ioerror (); |
| 915 | return; |
| 916 | } |
| 917 | /* Request oldpath using 'm' packet */ |
| 918 | oldpath = alloca (length); |
| 919 | retlength = remote_read_bytes (ptrval, oldpath, length); |
| 920 | if (retlength != length) |
| 921 | { |
| 922 | remote_fileio_ioerror (); |
| 923 | return; |
| 924 | } |
| 925 | /* 2. Parameter: Ptr to newpath / length incl. trailing zero */ |
| 926 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 927 | { |
| 928 | remote_fileio_ioerror (); |
| 929 | return; |
| 930 | } |
| 931 | /* Request newpath using 'm' packet */ |
| 932 | newpath = alloca (length); |
| 933 | retlength = remote_read_bytes (ptrval, newpath, length); |
| 934 | if (retlength != length) |
| 935 | { |
| 936 | remote_fileio_ioerror (); |
| 937 | return; |
| 938 | } |
| 939 | |
| 940 | /* Only operate on regular files and directories */ |
| 941 | of = stat (oldpath, &ost); |
| 942 | nf = stat (newpath, &nst); |
| 943 | if ((!of && !S_ISREG (ost.st_mode) && !S_ISDIR (ost.st_mode)) |
| 944 | || (!nf && !S_ISREG (nst.st_mode) && !S_ISDIR (nst.st_mode))) |
| 945 | { |
| 946 | remote_fileio_reply (-1, FILEIO_EACCES); |
| 947 | return; |
| 948 | } |
| 949 | |
| 950 | remote_fio_no_longjmp = 1; |
| 951 | ret = rename (oldpath, newpath); |
| 952 | |
| 953 | if (ret == -1) |
| 954 | { |
| 955 | /* Special case: newpath is a non-empty directory. Some systems |
| 956 | return ENOTEMPTY, some return EEXIST. We coerce that to be |
| 957 | always EEXIST. */ |
| 958 | if (errno == ENOTEMPTY) |
| 959 | errno = EEXIST; |
| 960 | #ifdef __CYGWIN__ |
| 961 | /* Workaround some Cygwin problems with correct errnos. */ |
| 962 | if (errno == EACCES) |
| 963 | { |
| 964 | if (!of && !nf && S_ISDIR (nst.st_mode)) |
| 965 | { |
| 966 | if (S_ISREG (ost.st_mode)) |
| 967 | errno = EISDIR; |
| 968 | else |
| 969 | { |
| 970 | char oldfullpath[PATH_MAX + 1]; |
| 971 | char newfullpath[PATH_MAX + 1]; |
| 972 | int len; |
| 973 | |
| 974 | cygwin_conv_to_full_posix_path (oldpath, oldfullpath); |
| 975 | cygwin_conv_to_full_posix_path (newpath, newfullpath); |
| 976 | len = strlen (oldfullpath); |
| 977 | if (newfullpath[len] == '/' |
| 978 | && !strncmp (oldfullpath, newfullpath, len)) |
| 979 | errno = EINVAL; |
| 980 | else |
| 981 | errno = EEXIST; |
| 982 | } |
| 983 | } |
| 984 | } |
| 985 | #endif |
| 986 | |
| 987 | remote_fileio_return_errno (-1); |
| 988 | } |
| 989 | else |
| 990 | remote_fileio_return_success (ret); |
| 991 | } |
| 992 | |
| 993 | static void |
| 994 | remote_fileio_func_unlink (char *buf) |
| 995 | { |
| 996 | CORE_ADDR ptrval; |
| 997 | int length, retlength; |
| 998 | char *pathname; |
| 999 | int ret; |
| 1000 | struct stat st; |
| 1001 | |
| 1002 | /* Parameter: Ptr to pathname / length incl. trailing zero */ |
| 1003 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 1004 | { |
| 1005 | remote_fileio_ioerror (); |
| 1006 | return; |
| 1007 | } |
| 1008 | /* Request pathname using 'm' packet */ |
| 1009 | pathname = alloca (length); |
| 1010 | retlength = remote_read_bytes (ptrval, pathname, length); |
| 1011 | if (retlength != length) |
| 1012 | { |
| 1013 | remote_fileio_ioerror (); |
| 1014 | return; |
| 1015 | } |
| 1016 | |
| 1017 | /* Only operate on regular files (and directories, which allows to return |
| 1018 | the correct return code) */ |
| 1019 | if (!stat (pathname, &st) && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) |
| 1020 | { |
| 1021 | remote_fileio_reply (-1, FILEIO_ENODEV); |
| 1022 | return; |
| 1023 | } |
| 1024 | |
| 1025 | remote_fio_no_longjmp = 1; |
| 1026 | ret = unlink (pathname); |
| 1027 | |
| 1028 | if (ret == -1) |
| 1029 | remote_fileio_return_errno (-1); |
| 1030 | else |
| 1031 | remote_fileio_return_success (ret); |
| 1032 | } |
| 1033 | |
| 1034 | static void |
| 1035 | remote_fileio_func_stat (char *buf) |
| 1036 | { |
| 1037 | CORE_ADDR ptrval; |
| 1038 | int ret, length, retlength; |
| 1039 | char *pathname; |
| 1040 | LONGEST lnum; |
| 1041 | struct stat st; |
| 1042 | struct fio_stat fst; |
| 1043 | |
| 1044 | /* 1. Parameter: Ptr to pathname / length incl. trailing zero */ |
| 1045 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 1046 | { |
| 1047 | remote_fileio_ioerror (); |
| 1048 | return; |
| 1049 | } |
| 1050 | /* Request pathname using 'm' packet */ |
| 1051 | pathname = alloca (length); |
| 1052 | retlength = remote_read_bytes (ptrval, pathname, length); |
| 1053 | if (retlength != length) |
| 1054 | { |
| 1055 | remote_fileio_ioerror (); |
| 1056 | return; |
| 1057 | } |
| 1058 | |
| 1059 | /* 2. Parameter: Ptr to struct stat */ |
| 1060 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 1061 | { |
| 1062 | remote_fileio_ioerror (); |
| 1063 | return; |
| 1064 | } |
| 1065 | ptrval = (CORE_ADDR) lnum; |
| 1066 | |
| 1067 | remote_fio_no_longjmp = 1; |
| 1068 | ret = stat (pathname, &st); |
| 1069 | |
| 1070 | if (ret == -1) |
| 1071 | { |
| 1072 | remote_fileio_return_errno (-1); |
| 1073 | return; |
| 1074 | } |
| 1075 | /* Only operate on regular files and directories */ |
| 1076 | if (!ret && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) |
| 1077 | { |
| 1078 | remote_fileio_reply (-1, FILEIO_EACCES); |
| 1079 | return; |
| 1080 | } |
| 1081 | if (ptrval) |
| 1082 | { |
| 1083 | remote_fileio_to_fio_stat (&st, &fst); |
| 1084 | remote_fileio_to_fio_uint (0, fst.fst_dev); |
| 1085 | |
| 1086 | retlength = remote_fileio_write_bytes (ptrval, (char *) &fst, sizeof fst); |
| 1087 | if (retlength != sizeof fst) |
| 1088 | { |
| 1089 | remote_fileio_return_errno (-1); |
| 1090 | return; |
| 1091 | } |
| 1092 | } |
| 1093 | remote_fileio_return_success (ret); |
| 1094 | } |
| 1095 | |
| 1096 | static void |
| 1097 | remote_fileio_func_fstat (char *buf) |
| 1098 | { |
| 1099 | CORE_ADDR ptrval; |
| 1100 | int fd, ret, retlength; |
| 1101 | long target_fd; |
| 1102 | LONGEST lnum; |
| 1103 | struct stat st; |
| 1104 | struct fio_stat fst; |
| 1105 | struct timeval tv; |
| 1106 | |
| 1107 | /* 1. Parameter: file descriptor */ |
| 1108 | if (remote_fileio_extract_int (&buf, &target_fd)) |
| 1109 | { |
| 1110 | remote_fileio_ioerror (); |
| 1111 | return; |
| 1112 | } |
| 1113 | fd = remote_fileio_map_fd ((int) target_fd); |
| 1114 | if (fd == FIO_FD_INVALID) |
| 1115 | { |
| 1116 | remote_fileio_badfd (); |
| 1117 | return; |
| 1118 | } |
| 1119 | /* 2. Parameter: Ptr to struct stat */ |
| 1120 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 1121 | { |
| 1122 | remote_fileio_ioerror (); |
| 1123 | return; |
| 1124 | } |
| 1125 | ptrval = (CORE_ADDR) lnum; |
| 1126 | |
| 1127 | remote_fio_no_longjmp = 1; |
| 1128 | if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) |
| 1129 | { |
| 1130 | remote_fileio_to_fio_uint (1, fst.fst_dev); |
| 1131 | st.st_mode = S_IFCHR | (fd == FIO_FD_CONSOLE_IN ? S_IRUSR : S_IWUSR); |
| 1132 | st.st_nlink = 1; |
| 1133 | st.st_uid = getuid (); |
| 1134 | st.st_gid = getgid (); |
| 1135 | st.st_rdev = 0; |
| 1136 | st.st_size = 0; |
| 1137 | st.st_blksize = 512; |
| 1138 | #if HAVE_STRUCT_STAT_ST_BLOCKS |
| 1139 | st.st_blocks = 0; |
| 1140 | #endif |
| 1141 | if (!gettimeofday (&tv, NULL)) |
| 1142 | st.st_atime = st.st_mtime = st.st_ctime = tv.tv_sec; |
| 1143 | else |
| 1144 | st.st_atime = st.st_mtime = st.st_ctime = (time_t) 0; |
| 1145 | ret = 0; |
| 1146 | } |
| 1147 | else |
| 1148 | ret = fstat (fd, &st); |
| 1149 | |
| 1150 | if (ret == -1) |
| 1151 | { |
| 1152 | remote_fileio_return_errno (-1); |
| 1153 | return; |
| 1154 | } |
| 1155 | if (ptrval) |
| 1156 | { |
| 1157 | remote_fileio_to_fio_stat (&st, &fst); |
| 1158 | |
| 1159 | retlength = remote_fileio_write_bytes (ptrval, (char *) &fst, sizeof fst); |
| 1160 | if (retlength != sizeof fst) |
| 1161 | { |
| 1162 | remote_fileio_return_errno (-1); |
| 1163 | return; |
| 1164 | } |
| 1165 | } |
| 1166 | remote_fileio_return_success (ret); |
| 1167 | } |
| 1168 | |
| 1169 | static void |
| 1170 | remote_fileio_func_gettimeofday (char *buf) |
| 1171 | { |
| 1172 | LONGEST lnum; |
| 1173 | CORE_ADDR ptrval; |
| 1174 | int ret, retlength; |
| 1175 | struct timeval tv; |
| 1176 | struct fio_timeval ftv; |
| 1177 | |
| 1178 | /* 1. Parameter: struct timeval pointer */ |
| 1179 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 1180 | { |
| 1181 | remote_fileio_ioerror (); |
| 1182 | return; |
| 1183 | } |
| 1184 | ptrval = (CORE_ADDR) lnum; |
| 1185 | /* 2. Parameter: some pointer value... */ |
| 1186 | if (remote_fileio_extract_long (&buf, &lnum)) |
| 1187 | { |
| 1188 | remote_fileio_ioerror (); |
| 1189 | return; |
| 1190 | } |
| 1191 | /* ...which has to be NULL */ |
| 1192 | if (lnum) |
| 1193 | { |
| 1194 | remote_fileio_reply (-1, FILEIO_EINVAL); |
| 1195 | return; |
| 1196 | } |
| 1197 | |
| 1198 | remote_fio_no_longjmp = 1; |
| 1199 | ret = gettimeofday (&tv, NULL); |
| 1200 | |
| 1201 | if (ret == -1) |
| 1202 | { |
| 1203 | remote_fileio_return_errno (-1); |
| 1204 | return; |
| 1205 | } |
| 1206 | |
| 1207 | if (ptrval) |
| 1208 | { |
| 1209 | remote_fileio_to_fio_timeval (&tv, &ftv); |
| 1210 | |
| 1211 | retlength = remote_fileio_write_bytes (ptrval, (char *) &ftv, sizeof ftv); |
| 1212 | if (retlength != sizeof ftv) |
| 1213 | { |
| 1214 | remote_fileio_return_errno (-1); |
| 1215 | return; |
| 1216 | } |
| 1217 | } |
| 1218 | remote_fileio_return_success (ret); |
| 1219 | } |
| 1220 | |
| 1221 | static void |
| 1222 | remote_fileio_func_isatty (char *buf) |
| 1223 | { |
| 1224 | long target_fd; |
| 1225 | int fd; |
| 1226 | |
| 1227 | /* Parameter: file descriptor */ |
| 1228 | if (remote_fileio_extract_int (&buf, &target_fd)) |
| 1229 | { |
| 1230 | remote_fileio_ioerror (); |
| 1231 | return; |
| 1232 | } |
| 1233 | remote_fio_no_longjmp = 1; |
| 1234 | fd = remote_fileio_map_fd ((int) target_fd); |
| 1235 | remote_fileio_return_success (fd == FIO_FD_CONSOLE_IN || |
| 1236 | fd == FIO_FD_CONSOLE_OUT ? 1 : 0); |
| 1237 | } |
| 1238 | |
| 1239 | static void |
| 1240 | remote_fileio_func_system (char *buf) |
| 1241 | { |
| 1242 | CORE_ADDR ptrval; |
| 1243 | int ret, length, retlength; |
| 1244 | char *cmdline; |
| 1245 | |
| 1246 | /* Check if system(3) has been explicitely allowed using the |
| 1247 | `set remote system-call-allowed 1' command. If not, return |
| 1248 | EPERM */ |
| 1249 | if (!remote_fio_system_call_allowed) |
| 1250 | { |
| 1251 | remote_fileio_reply (-1, FILEIO_EPERM); |
| 1252 | return; |
| 1253 | } |
| 1254 | |
| 1255 | /* Parameter: Ptr to commandline / length incl. trailing zero */ |
| 1256 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
| 1257 | { |
| 1258 | remote_fileio_ioerror (); |
| 1259 | return; |
| 1260 | } |
| 1261 | /* Request commandline using 'm' packet */ |
| 1262 | cmdline = alloca (length); |
| 1263 | retlength = remote_read_bytes (ptrval, cmdline, length); |
| 1264 | if (retlength != length) |
| 1265 | { |
| 1266 | remote_fileio_ioerror (); |
| 1267 | return; |
| 1268 | } |
| 1269 | |
| 1270 | remote_fio_no_longjmp = 1; |
| 1271 | ret = system (cmdline); |
| 1272 | |
| 1273 | if (ret == -1) |
| 1274 | remote_fileio_return_errno (-1); |
| 1275 | else |
| 1276 | remote_fileio_return_success (WEXITSTATUS (ret)); |
| 1277 | } |
| 1278 | |
| 1279 | static struct { |
| 1280 | char *name; |
| 1281 | void (*func)(char *); |
| 1282 | } remote_fio_func_map[] = { |
| 1283 | "open", remote_fileio_func_open, |
| 1284 | "close", remote_fileio_func_close, |
| 1285 | "read", remote_fileio_func_read, |
| 1286 | "write", remote_fileio_func_write, |
| 1287 | "lseek", remote_fileio_func_lseek, |
| 1288 | "rename", remote_fileio_func_rename, |
| 1289 | "unlink", remote_fileio_func_unlink, |
| 1290 | "stat", remote_fileio_func_stat, |
| 1291 | "fstat", remote_fileio_func_fstat, |
| 1292 | "gettimeofday", remote_fileio_func_gettimeofday, |
| 1293 | "isatty", remote_fileio_func_isatty, |
| 1294 | "system", remote_fileio_func_system, |
| 1295 | NULL, NULL |
| 1296 | }; |
| 1297 | |
| 1298 | static int |
| 1299 | do_remote_fileio_request (struct ui_out *uiout, void *buf_arg) |
| 1300 | { |
| 1301 | char *buf = buf_arg; |
| 1302 | char *c; |
| 1303 | int idx; |
| 1304 | |
| 1305 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); |
| 1306 | |
| 1307 | c = strchr (++buf, ','); |
| 1308 | if (c) |
| 1309 | *c++ = '\0'; |
| 1310 | else |
| 1311 | c = strchr (buf, '\0'); |
| 1312 | for (idx = 0; remote_fio_func_map[idx].name; ++idx) |
| 1313 | if (!strcmp (remote_fio_func_map[idx].name, buf)) |
| 1314 | break; |
| 1315 | if (!remote_fio_func_map[idx].name) /* ERROR: No such function. */ |
| 1316 | return RETURN_ERROR; |
| 1317 | remote_fio_func_map[idx].func (c); |
| 1318 | return 0; |
| 1319 | } |
| 1320 | |
| 1321 | void |
| 1322 | remote_fileio_request (char *buf) |
| 1323 | { |
| 1324 | int ex; |
| 1325 | |
| 1326 | remote_fileio_sig_init (); |
| 1327 | |
| 1328 | remote_fio_ctrl_c_flag = 0; |
| 1329 | remote_fio_no_longjmp = 0; |
| 1330 | |
| 1331 | ex = catch_exceptions (uiout, do_remote_fileio_request, (void *)buf, |
| 1332 | RETURN_MASK_ALL); |
| 1333 | switch (ex) |
| 1334 | { |
| 1335 | case RETURN_ERROR: |
| 1336 | remote_fileio_reply (-1, FILEIO_ENOSYS); |
| 1337 | break; |
| 1338 | case RETURN_QUIT: |
| 1339 | remote_fileio_reply (-1, FILEIO_EINTR); |
| 1340 | break; |
| 1341 | default: |
| 1342 | break; |
| 1343 | } |
| 1344 | |
| 1345 | remote_fileio_sig_exit (); |
| 1346 | } |
| 1347 | |
| 1348 | static void |
| 1349 | set_system_call_allowed (char *args, int from_tty) |
| 1350 | { |
| 1351 | if (args) |
| 1352 | { |
| 1353 | char *arg_end; |
| 1354 | int val = strtoul (args, &arg_end, 10); |
| 1355 | if (*args && *arg_end == '\0') |
| 1356 | { |
| 1357 | remote_fio_system_call_allowed = !!val; |
| 1358 | return; |
| 1359 | } |
| 1360 | } |
| 1361 | error (_("Illegal argument for \"set remote system-call-allowed\" command")); |
| 1362 | } |
| 1363 | |
| 1364 | static void |
| 1365 | show_system_call_allowed (char *args, int from_tty) |
| 1366 | { |
| 1367 | if (args) |
| 1368 | error (_("Garbage after \"show remote system-call-allowed\" command: `%s'"), args); |
| 1369 | printf_unfiltered ("Calling host system(3) call from target is %sallowed\n", |
| 1370 | remote_fio_system_call_allowed ? "" : "not "); |
| 1371 | } |
| 1372 | |
| 1373 | void |
| 1374 | initialize_remote_fileio (struct cmd_list_element *remote_set_cmdlist, |
| 1375 | struct cmd_list_element *remote_show_cmdlist) |
| 1376 | { |
| 1377 | add_cmd ("system-call-allowed", no_class, |
| 1378 | set_system_call_allowed, |
| 1379 | "Set if the host system(3) call is allowed for the target.\n", |
| 1380 | &remote_set_cmdlist); |
| 1381 | add_cmd ("system-call-allowed", no_class, |
| 1382 | show_system_call_allowed, |
| 1383 | "Show if the host system(3) call is allowed for the target.\n", |
| 1384 | &remote_show_cmdlist); |
| 1385 | } |