| 1 | /* Remote target callback routines. |
| 2 | Copyright 1995, 1996, 1997, 2000, 2002, 2003, 2004 |
| 3 | Free Software Foundation, Inc. |
| 4 | Contributed by Cygnus Solutions. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GAS; see the file COPYING. If not, write to the Free Software |
| 20 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | /* This file provides a standard way for targets to talk to the host OS |
| 23 | level. */ |
| 24 | |
| 25 | #ifdef HAVE_CONFIG_H |
| 26 | #include "cconfig.h" |
| 27 | #endif |
| 28 | #include "ansidecl.h" |
| 29 | #ifdef ANSI_PROTOTYPES |
| 30 | #include <stdarg.h> |
| 31 | #else |
| 32 | #include <varargs.h> |
| 33 | #endif |
| 34 | #include <stdio.h> |
| 35 | #ifdef HAVE_STDLIB_H |
| 36 | #include <stdlib.h> |
| 37 | #endif |
| 38 | #ifdef HAVE_STRING_H |
| 39 | #include <string.h> |
| 40 | #else |
| 41 | #ifdef HAVE_STRINGS_H |
| 42 | #include <strings.h> |
| 43 | #endif |
| 44 | #endif |
| 45 | #include <errno.h> |
| 46 | #include <fcntl.h> |
| 47 | #include <time.h> |
| 48 | #include <sys/types.h> |
| 49 | #include <sys/stat.h> |
| 50 | #include "gdb/callback.h" |
| 51 | #include "targ-vals.h" |
| 52 | |
| 53 | #ifdef HAVE_UNISTD_H |
| 54 | #include <unistd.h> |
| 55 | #endif |
| 56 | |
| 57 | /* ??? sim_cb_printf should be cb_printf, but until the callback support is |
| 58 | broken out of the simulator directory, these are here to not require |
| 59 | sim-utils.h. */ |
| 60 | void sim_cb_printf PARAMS ((host_callback *, const char *, ...)); |
| 61 | void sim_cb_eprintf PARAMS ((host_callback *, const char *, ...)); |
| 62 | |
| 63 | extern CB_TARGET_DEFS_MAP cb_init_syscall_map[]; |
| 64 | extern CB_TARGET_DEFS_MAP cb_init_errno_map[]; |
| 65 | extern CB_TARGET_DEFS_MAP cb_init_open_map[]; |
| 66 | |
| 67 | extern int system PARAMS ((const char *)); |
| 68 | |
| 69 | static int os_init PARAMS ((host_callback *)); |
| 70 | static int os_shutdown PARAMS ((host_callback *)); |
| 71 | static int os_unlink PARAMS ((host_callback *, const char *)); |
| 72 | static long os_time PARAMS ((host_callback *, long *)); |
| 73 | static int os_system PARAMS ((host_callback *, const char *)); |
| 74 | static int os_rename PARAMS ((host_callback *, const char *, const char *)); |
| 75 | static int os_write_stdout PARAMS ((host_callback *, const char *, int)); |
| 76 | static void os_flush_stdout PARAMS ((host_callback *)); |
| 77 | static int os_write_stderr PARAMS ((host_callback *, const char *, int)); |
| 78 | static void os_flush_stderr PARAMS ((host_callback *)); |
| 79 | static int os_write PARAMS ((host_callback *, int, const char *, int)); |
| 80 | static int os_read_stdin PARAMS ((host_callback *, char *, int)); |
| 81 | static int os_read PARAMS ((host_callback *, int, char *, int)); |
| 82 | static int os_open PARAMS ((host_callback *, const char *, int)); |
| 83 | static int os_lseek PARAMS ((host_callback *, int, long, int)); |
| 84 | static int os_isatty PARAMS ((host_callback *, int)); |
| 85 | static int os_get_errno PARAMS ((host_callback *)); |
| 86 | static int os_close PARAMS ((host_callback *, int)); |
| 87 | static void os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
| 88 | static void os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
| 89 | static void os_error PARAMS ((host_callback *, const char *, ...)); |
| 90 | static int fdmap PARAMS ((host_callback *, int)); |
| 91 | static int fdbad PARAMS ((host_callback *, int)); |
| 92 | static int wrap PARAMS ((host_callback *, int)); |
| 93 | |
| 94 | /* Set the callback copy of errno from what we see now. */ |
| 95 | |
| 96 | static int |
| 97 | wrap (p, val) |
| 98 | host_callback *p; |
| 99 | int val; |
| 100 | { |
| 101 | p->last_errno = errno; |
| 102 | return val; |
| 103 | } |
| 104 | |
| 105 | /* Make sure the FD provided is ok. If not, return non-zero |
| 106 | and set errno. */ |
| 107 | |
| 108 | static int |
| 109 | fdbad (p, fd) |
| 110 | host_callback *p; |
| 111 | int fd; |
| 112 | { |
| 113 | if (fd < 0 || fd > MAX_CALLBACK_FDS || p->fd_buddy[fd] < 0) |
| 114 | { |
| 115 | p->last_errno = EINVAL; |
| 116 | return -1; |
| 117 | } |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | static int |
| 122 | fdmap (p, fd) |
| 123 | host_callback *p; |
| 124 | int fd; |
| 125 | { |
| 126 | return p->fdmap[fd]; |
| 127 | } |
| 128 | |
| 129 | static int |
| 130 | os_close (p, fd) |
| 131 | host_callback *p; |
| 132 | int fd; |
| 133 | { |
| 134 | int result; |
| 135 | int i, next; |
| 136 | |
| 137 | result = fdbad (p, fd); |
| 138 | if (result) |
| 139 | return result; |
| 140 | /* If this file descripter has one or more buddies (originals / |
| 141 | duplicates from a dup), just remove it from the circular list. */ |
| 142 | for (i = fd; (next = p->fd_buddy[i]) != fd; ) |
| 143 | i = next; |
| 144 | if (fd != i) |
| 145 | p->fd_buddy[i] = p->fd_buddy[fd]; |
| 146 | else |
| 147 | result = wrap (p, close (fdmap (p, fd))); |
| 148 | p->fd_buddy[fd] = -1; |
| 149 | |
| 150 | return result; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | /* taken from gdb/util.c:notice_quit() - should be in a library */ |
| 155 | |
| 156 | |
| 157 | #if defined(__GO32__) || defined (_MSC_VER) |
| 158 | static int |
| 159 | os_poll_quit (p) |
| 160 | host_callback *p; |
| 161 | { |
| 162 | #if defined(__GO32__) |
| 163 | int kbhit (); |
| 164 | int getkey (); |
| 165 | if (kbhit ()) |
| 166 | { |
| 167 | int k = getkey (); |
| 168 | if (k == 1) |
| 169 | { |
| 170 | return 1; |
| 171 | } |
| 172 | else if (k == 2) |
| 173 | { |
| 174 | return 1; |
| 175 | } |
| 176 | else |
| 177 | { |
| 178 | sim_cb_eprintf (p, "CTRL-A to quit, CTRL-B to quit harder\n"); |
| 179 | } |
| 180 | } |
| 181 | #endif |
| 182 | #if defined (_MSC_VER) |
| 183 | /* NB - this will not compile! */ |
| 184 | int k = win32pollquit(); |
| 185 | if (k == 1) |
| 186 | return 1; |
| 187 | else if (k == 2) |
| 188 | return 1; |
| 189 | #endif |
| 190 | return 0; |
| 191 | } |
| 192 | #else |
| 193 | #define os_poll_quit 0 |
| 194 | #endif /* defined(__GO32__) || defined(_MSC_VER) */ |
| 195 | |
| 196 | static int |
| 197 | os_get_errno (p) |
| 198 | host_callback *p; |
| 199 | { |
| 200 | return cb_host_to_target_errno (p, p->last_errno); |
| 201 | } |
| 202 | |
| 203 | |
| 204 | static int |
| 205 | os_isatty (p, fd) |
| 206 | host_callback *p; |
| 207 | int fd; |
| 208 | { |
| 209 | int result; |
| 210 | |
| 211 | result = fdbad (p, fd); |
| 212 | if (result) |
| 213 | return result; |
| 214 | result = wrap (p, isatty (fdmap (p, fd))); |
| 215 | |
| 216 | return result; |
| 217 | } |
| 218 | |
| 219 | static int |
| 220 | os_lseek (p, fd, off, way) |
| 221 | host_callback *p; |
| 222 | int fd; |
| 223 | long off; |
| 224 | int way; |
| 225 | { |
| 226 | int result; |
| 227 | |
| 228 | result = fdbad (p, fd); |
| 229 | if (result) |
| 230 | return result; |
| 231 | result = lseek (fdmap (p, fd), off, way); |
| 232 | return result; |
| 233 | } |
| 234 | |
| 235 | static int |
| 236 | os_open (p, name, flags) |
| 237 | host_callback *p; |
| 238 | const char *name; |
| 239 | int flags; |
| 240 | { |
| 241 | int i; |
| 242 | for (i = 0; i < MAX_CALLBACK_FDS; i++) |
| 243 | { |
| 244 | if (p->fd_buddy[i] < 0) |
| 245 | { |
| 246 | int f = open (name, cb_target_to_host_open (p, flags), 0644); |
| 247 | if (f < 0) |
| 248 | { |
| 249 | p->last_errno = errno; |
| 250 | return f; |
| 251 | } |
| 252 | p->fd_buddy[i] = i; |
| 253 | p->fdmap[i] = f; |
| 254 | return i; |
| 255 | } |
| 256 | } |
| 257 | p->last_errno = EMFILE; |
| 258 | return -1; |
| 259 | } |
| 260 | |
| 261 | static int |
| 262 | os_read (p, fd, buf, len) |
| 263 | host_callback *p; |
| 264 | int fd; |
| 265 | char *buf; |
| 266 | int len; |
| 267 | { |
| 268 | int result; |
| 269 | |
| 270 | result = fdbad (p, fd); |
| 271 | if (result) |
| 272 | return result; |
| 273 | result = wrap (p, read (fdmap (p, fd), buf, len)); |
| 274 | return result; |
| 275 | } |
| 276 | |
| 277 | static int |
| 278 | os_read_stdin (p, buf, len) |
| 279 | host_callback *p; |
| 280 | char *buf; |
| 281 | int len; |
| 282 | { |
| 283 | return wrap (p, read (0, buf, len)); |
| 284 | } |
| 285 | |
| 286 | static int |
| 287 | os_write (p, fd, buf, len) |
| 288 | host_callback *p; |
| 289 | int fd; |
| 290 | const char *buf; |
| 291 | int len; |
| 292 | { |
| 293 | int result; |
| 294 | int real_fd; |
| 295 | |
| 296 | result = fdbad (p, fd); |
| 297 | if (result) |
| 298 | return result; |
| 299 | real_fd = fdmap (p, fd); |
| 300 | switch (real_fd) |
| 301 | { |
| 302 | default: |
| 303 | result = wrap (p, write (real_fd, buf, len)); |
| 304 | break; |
| 305 | case 1: |
| 306 | result = p->write_stdout (p, buf, len); |
| 307 | break; |
| 308 | case 2: |
| 309 | result = p->write_stderr (p, buf, len); |
| 310 | break; |
| 311 | } |
| 312 | return result; |
| 313 | } |
| 314 | |
| 315 | static int |
| 316 | os_write_stdout (p, buf, len) |
| 317 | host_callback *p ATTRIBUTE_UNUSED; |
| 318 | const char *buf; |
| 319 | int len; |
| 320 | { |
| 321 | return fwrite (buf, 1, len, stdout); |
| 322 | } |
| 323 | |
| 324 | static void |
| 325 | os_flush_stdout (p) |
| 326 | host_callback *p ATTRIBUTE_UNUSED; |
| 327 | { |
| 328 | fflush (stdout); |
| 329 | } |
| 330 | |
| 331 | static int |
| 332 | os_write_stderr (p, buf, len) |
| 333 | host_callback *p ATTRIBUTE_UNUSED; |
| 334 | const char *buf; |
| 335 | int len; |
| 336 | { |
| 337 | return fwrite (buf, 1, len, stderr); |
| 338 | } |
| 339 | |
| 340 | static void |
| 341 | os_flush_stderr (p) |
| 342 | host_callback *p ATTRIBUTE_UNUSED; |
| 343 | { |
| 344 | fflush (stderr); |
| 345 | } |
| 346 | |
| 347 | static int |
| 348 | os_rename (p, f1, f2) |
| 349 | host_callback *p; |
| 350 | const char *f1; |
| 351 | const char *f2; |
| 352 | { |
| 353 | return wrap (p, rename (f1, f2)); |
| 354 | } |
| 355 | |
| 356 | |
| 357 | static int |
| 358 | os_system (p, s) |
| 359 | host_callback *p; |
| 360 | const char *s; |
| 361 | { |
| 362 | return wrap (p, system (s)); |
| 363 | } |
| 364 | |
| 365 | static long |
| 366 | os_time (p, t) |
| 367 | host_callback *p; |
| 368 | long *t; |
| 369 | { |
| 370 | return wrap (p, time (t)); |
| 371 | } |
| 372 | |
| 373 | |
| 374 | static int |
| 375 | os_unlink (p, f1) |
| 376 | host_callback *p; |
| 377 | const char *f1; |
| 378 | { |
| 379 | return wrap (p, unlink (f1)); |
| 380 | } |
| 381 | |
| 382 | static int |
| 383 | os_stat (p, file, buf) |
| 384 | host_callback *p; |
| 385 | const char *file; |
| 386 | struct stat *buf; |
| 387 | { |
| 388 | /* ??? There is an issue of when to translate to the target layout. |
| 389 | One could do that inside this function, or one could have the |
| 390 | caller do it. It's more flexible to let the caller do it, though |
| 391 | I'm not sure the flexibility will ever be useful. */ |
| 392 | return wrap (p, stat (file, buf)); |
| 393 | } |
| 394 | |
| 395 | static int |
| 396 | os_fstat (p, fd, buf) |
| 397 | host_callback *p; |
| 398 | int fd; |
| 399 | struct stat *buf; |
| 400 | { |
| 401 | if (fdbad (p, fd)) |
| 402 | return -1; |
| 403 | /* ??? There is an issue of when to translate to the target layout. |
| 404 | One could do that inside this function, or one could have the |
| 405 | caller do it. It's more flexible to let the caller do it, though |
| 406 | I'm not sure the flexibility will ever be useful. */ |
| 407 | return wrap (p, fstat (fdmap (p, fd), buf)); |
| 408 | } |
| 409 | |
| 410 | static int |
| 411 | os_ftruncate (p, fd, len) |
| 412 | host_callback *p; |
| 413 | int fd; |
| 414 | long len; |
| 415 | { |
| 416 | int result; |
| 417 | |
| 418 | result = fdbad (p, fd); |
| 419 | if (result) |
| 420 | return result; |
| 421 | result = wrap (p, ftruncate (fdmap (p, fd), len)); |
| 422 | return result; |
| 423 | } |
| 424 | |
| 425 | static int |
| 426 | os_truncate (p, file, len) |
| 427 | host_callback *p; |
| 428 | const char *file; |
| 429 | long len; |
| 430 | { |
| 431 | return wrap (p, truncate (file, len)); |
| 432 | } |
| 433 | |
| 434 | static int |
| 435 | os_shutdown (p) |
| 436 | host_callback *p; |
| 437 | { |
| 438 | int i, next, j; |
| 439 | for (i = 0; i < MAX_CALLBACK_FDS; i++) |
| 440 | { |
| 441 | int do_close = 1; |
| 442 | |
| 443 | next = p->fd_buddy[i]; |
| 444 | if (next < 0) |
| 445 | continue; |
| 446 | do |
| 447 | { |
| 448 | j = next; |
| 449 | if (j == MAX_CALLBACK_FDS) |
| 450 | do_close = 0; |
| 451 | next = p->fd_buddy[j]; |
| 452 | p->fd_buddy[j] = -1; |
| 453 | /* At the initial call of os_init, we got -1, 0, 0, 0, ... */ |
| 454 | if (next < 0) |
| 455 | { |
| 456 | p->fd_buddy[i] = -1; |
| 457 | do_close = 0; |
| 458 | break; |
| 459 | } |
| 460 | } |
| 461 | while (j != i); |
| 462 | if (do_close) |
| 463 | close (p->fdmap[i]); |
| 464 | } |
| 465 | return 1; |
| 466 | } |
| 467 | |
| 468 | static int |
| 469 | os_init (p) |
| 470 | host_callback *p; |
| 471 | { |
| 472 | int i; |
| 473 | |
| 474 | os_shutdown (p); |
| 475 | for (i = 0; i < 3; i++) |
| 476 | { |
| 477 | p->fdmap[i] = i; |
| 478 | p->fd_buddy[i] = i - 1; |
| 479 | } |
| 480 | p->fd_buddy[0] = MAX_CALLBACK_FDS; |
| 481 | p->fd_buddy[MAX_CALLBACK_FDS] = 2; |
| 482 | |
| 483 | p->syscall_map = cb_init_syscall_map; |
| 484 | p->errno_map = cb_init_errno_map; |
| 485 | p->open_map = cb_init_open_map; |
| 486 | |
| 487 | return 1; |
| 488 | } |
| 489 | |
| 490 | /* DEPRECATED */ |
| 491 | |
| 492 | /* VARARGS */ |
| 493 | static void |
| 494 | #ifdef ANSI_PROTOTYPES |
| 495 | os_printf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, ...) |
| 496 | #else |
| 497 | os_printf_filtered (p, va_alist) |
| 498 | host_callback *p; |
| 499 | va_dcl |
| 500 | #endif |
| 501 | { |
| 502 | va_list args; |
| 503 | #ifdef ANSI_PROTOTYPES |
| 504 | va_start (args, format); |
| 505 | #else |
| 506 | char *format; |
| 507 | |
| 508 | va_start (args); |
| 509 | format = va_arg (args, char *); |
| 510 | #endif |
| 511 | |
| 512 | vfprintf (stdout, format, args); |
| 513 | va_end (args); |
| 514 | } |
| 515 | |
| 516 | /* VARARGS */ |
| 517 | static void |
| 518 | #ifdef ANSI_PROTOTYPES |
| 519 | os_vprintf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, va_list args) |
| 520 | #else |
| 521 | os_vprintf_filtered (p, format, args) |
| 522 | host_callback *p; |
| 523 | const char *format; |
| 524 | va_list args; |
| 525 | #endif |
| 526 | { |
| 527 | vprintf (format, args); |
| 528 | } |
| 529 | |
| 530 | /* VARARGS */ |
| 531 | static void |
| 532 | #ifdef ANSI_PROTOTYPES |
| 533 | os_evprintf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, va_list args) |
| 534 | #else |
| 535 | os_evprintf_filtered (p, format, args) |
| 536 | host_callback *p; |
| 537 | const char *format; |
| 538 | va_list args; |
| 539 | #endif |
| 540 | { |
| 541 | vfprintf (stderr, format, args); |
| 542 | } |
| 543 | |
| 544 | /* VARARGS */ |
| 545 | static void |
| 546 | #ifdef ANSI_PROTOTYPES |
| 547 | os_error (host_callback *p ATTRIBUTE_UNUSED, const char *format, ...) |
| 548 | #else |
| 549 | os_error (p, va_alist) |
| 550 | host_callback *p; |
| 551 | va_dcl |
| 552 | #endif |
| 553 | { |
| 554 | va_list args; |
| 555 | #ifdef ANSI_PROTOTYPES |
| 556 | va_start (args, format); |
| 557 | #else |
| 558 | char *format; |
| 559 | |
| 560 | va_start (args); |
| 561 | format = va_arg (args, char *); |
| 562 | #endif |
| 563 | |
| 564 | vfprintf (stderr, format, args); |
| 565 | fprintf (stderr, "\n"); |
| 566 | |
| 567 | va_end (args); |
| 568 | exit (1); |
| 569 | } |
| 570 | |
| 571 | host_callback default_callback = |
| 572 | { |
| 573 | os_close, |
| 574 | os_get_errno, |
| 575 | os_isatty, |
| 576 | os_lseek, |
| 577 | os_open, |
| 578 | os_read, |
| 579 | os_read_stdin, |
| 580 | os_rename, |
| 581 | os_system, |
| 582 | os_time, |
| 583 | os_unlink, |
| 584 | os_write, |
| 585 | os_write_stdout, |
| 586 | os_flush_stdout, |
| 587 | os_write_stderr, |
| 588 | os_flush_stderr, |
| 589 | |
| 590 | os_stat, |
| 591 | os_fstat, |
| 592 | |
| 593 | os_ftruncate, |
| 594 | os_truncate, |
| 595 | |
| 596 | os_poll_quit, |
| 597 | |
| 598 | os_shutdown, |
| 599 | os_init, |
| 600 | |
| 601 | os_printf_filtered, /* deprecated */ |
| 602 | |
| 603 | os_vprintf_filtered, |
| 604 | os_evprintf_filtered, |
| 605 | os_error, |
| 606 | |
| 607 | 0, /* last errno */ |
| 608 | |
| 609 | { 0, }, /* fdmap */ |
| 610 | { -1, }, /* fd_buddy */ |
| 611 | |
| 612 | 0, /* syscall_map */ |
| 613 | 0, /* errno_map */ |
| 614 | 0, /* open_map */ |
| 615 | 0, /* signal_map */ |
| 616 | 0, /* stat_map */ |
| 617 | |
| 618 | HOST_CALLBACK_MAGIC, |
| 619 | }; |
| 620 | \f |
| 621 | /* Read in a file describing the target's system call values. |
| 622 | E.g. maybe someone will want to use something other than newlib. |
| 623 | This assumes that the basic system call recognition and value passing/ |
| 624 | returning is supported. So maybe some coding/recompilation will be |
| 625 | necessary, but not as much. |
| 626 | |
| 627 | If an error occurs, the existing mapping is not changed. */ |
| 628 | |
| 629 | CB_RC |
| 630 | cb_read_target_syscall_maps (cb, file) |
| 631 | host_callback *cb; |
| 632 | const char *file; |
| 633 | { |
| 634 | CB_TARGET_DEFS_MAP *syscall_map, *errno_map, *open_map, *signal_map; |
| 635 | const char *stat_map; |
| 636 | FILE *f; |
| 637 | |
| 638 | if ((f = fopen (file, "r")) == NULL) |
| 639 | return CB_RC_ACCESS; |
| 640 | |
| 641 | /* ... read in and parse file ... */ |
| 642 | |
| 643 | fclose (f); |
| 644 | return CB_RC_NO_MEM; /* FIXME:wip */ |
| 645 | |
| 646 | /* Free storage allocated for any existing maps. */ |
| 647 | if (cb->syscall_map) |
| 648 | free (cb->syscall_map); |
| 649 | if (cb->errno_map) |
| 650 | free (cb->errno_map); |
| 651 | if (cb->open_map) |
| 652 | free (cb->open_map); |
| 653 | if (cb->signal_map) |
| 654 | free (cb->signal_map); |
| 655 | if (cb->stat_map) |
| 656 | free ((PTR) cb->stat_map); |
| 657 | |
| 658 | cb->syscall_map = syscall_map; |
| 659 | cb->errno_map = errno_map; |
| 660 | cb->open_map = open_map; |
| 661 | cb->signal_map = signal_map; |
| 662 | cb->stat_map = stat_map; |
| 663 | |
| 664 | return CB_RC_OK; |
| 665 | } |
| 666 | |
| 667 | /* Translate the target's version of a syscall number to the host's. |
| 668 | This isn't actually the host's version, rather a canonical form. |
| 669 | ??? Perhaps this should be renamed to ..._canon_syscall. */ |
| 670 | |
| 671 | int |
| 672 | cb_target_to_host_syscall (cb, target_val) |
| 673 | host_callback *cb; |
| 674 | int target_val; |
| 675 | { |
| 676 | CB_TARGET_DEFS_MAP *m; |
| 677 | |
| 678 | for (m = &cb->syscall_map[0]; m->target_val != -1; ++m) |
| 679 | if (m->target_val == target_val) |
| 680 | return m->host_val; |
| 681 | |
| 682 | return -1; |
| 683 | } |
| 684 | |
| 685 | /* FIXME: sort tables if large. |
| 686 | Alternatively, an obvious improvement for errno conversion is |
| 687 | to machine generate a function with a large switch(). */ |
| 688 | |
| 689 | /* Translate the host's version of errno to the target's. */ |
| 690 | |
| 691 | int |
| 692 | cb_host_to_target_errno (cb, host_val) |
| 693 | host_callback *cb; |
| 694 | int host_val; |
| 695 | { |
| 696 | CB_TARGET_DEFS_MAP *m; |
| 697 | |
| 698 | for (m = &cb->errno_map[0]; m->host_val; ++m) |
| 699 | if (m->host_val == host_val) |
| 700 | return m->target_val; |
| 701 | |
| 702 | /* ??? Which error to return in this case is up for grabs. |
| 703 | Note that some missing values may have standard alternatives. |
| 704 | For now return 0 and require caller to deal with it. */ |
| 705 | return 0; |
| 706 | } |
| 707 | |
| 708 | /* Given a set of target bitmasks for the open system call, |
| 709 | return the host equivalent. |
| 710 | Mapping open flag values is best done by looping so there's no need |
| 711 | to machine generate this function. */ |
| 712 | |
| 713 | int |
| 714 | cb_target_to_host_open (cb, target_val) |
| 715 | host_callback *cb; |
| 716 | int target_val; |
| 717 | { |
| 718 | int host_val = 0; |
| 719 | CB_TARGET_DEFS_MAP *m; |
| 720 | |
| 721 | for (m = &cb->open_map[0]; m->host_val != -1; ++m) |
| 722 | { |
| 723 | switch (m->target_val) |
| 724 | { |
| 725 | /* O_RDONLY can be (and usually is) 0 which needs to be treated |
| 726 | specially. */ |
| 727 | case TARGET_O_RDONLY : |
| 728 | case TARGET_O_WRONLY : |
| 729 | case TARGET_O_RDWR : |
| 730 | if ((target_val & (TARGET_O_RDONLY | TARGET_O_WRONLY | TARGET_O_RDWR)) |
| 731 | == m->target_val) |
| 732 | host_val |= m->host_val; |
| 733 | /* Handle the host/target differentiating between binary and |
| 734 | text mode. Only one case is of importance */ |
| 735 | #if ! defined (TARGET_O_BINARY) && defined (O_BINARY) |
| 736 | host_val |= O_BINARY; |
| 737 | #endif |
| 738 | break; |
| 739 | default : |
| 740 | if ((m->target_val & target_val) == m->target_val) |
| 741 | host_val |= m->host_val; |
| 742 | break; |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | return host_val; |
| 747 | } |
| 748 | |
| 749 | /* Utility for cb_host_to_target_stat to store values in the target's |
| 750 | stat struct. */ |
| 751 | |
| 752 | static void |
| 753 | store (p, size, val, big_p) |
| 754 | char *p; |
| 755 | int size; |
| 756 | long val; /* ??? must be as big as target word size */ |
| 757 | int big_p; |
| 758 | { |
| 759 | if (big_p) |
| 760 | { |
| 761 | p += size; |
| 762 | while (size-- > 0) |
| 763 | { |
| 764 | *--p = val; |
| 765 | val >>= 8; |
| 766 | } |
| 767 | } |
| 768 | else |
| 769 | { |
| 770 | while (size-- > 0) |
| 771 | { |
| 772 | *p++ = val; |
| 773 | val >>= 8; |
| 774 | } |
| 775 | } |
| 776 | } |
| 777 | |
| 778 | /* Translate a host's stat struct into a target's. |
| 779 | If HS is NULL, just compute the length of the buffer required, |
| 780 | TS is ignored. |
| 781 | |
| 782 | The result is the size of the target's stat struct, |
| 783 | or zero if an error occurred during the translation. */ |
| 784 | |
| 785 | int |
| 786 | cb_host_to_target_stat (cb, hs, ts) |
| 787 | host_callback *cb; |
| 788 | const struct stat *hs; |
| 789 | PTR ts; |
| 790 | { |
| 791 | const char *m = cb->stat_map; |
| 792 | char *p; |
| 793 | int big_p = 0; |
| 794 | |
| 795 | if (hs == NULL) |
| 796 | ts = NULL; |
| 797 | p = ts; |
| 798 | |
| 799 | while (m) |
| 800 | { |
| 801 | char *q = strchr (m, ','); |
| 802 | int size; |
| 803 | |
| 804 | /* FIXME: Use sscanf? */ |
| 805 | if (q == NULL) |
| 806 | { |
| 807 | /* FIXME: print error message */ |
| 808 | return 0; |
| 809 | } |
| 810 | size = atoi (q + 1); |
| 811 | if (size == 0) |
| 812 | { |
| 813 | /* FIXME: print error message */ |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | if (hs != NULL) |
| 818 | { |
| 819 | if (strncmp (m, "st_dev", q - m) == 0) |
| 820 | store (p, size, hs->st_dev, big_p); |
| 821 | else if (strncmp (m, "st_ino", q - m) == 0) |
| 822 | store (p, size, hs->st_ino, big_p); |
| 823 | /* FIXME:wip */ |
| 824 | else |
| 825 | store (p, size, 0, big_p); /* unsupported field, store 0 */ |
| 826 | } |
| 827 | |
| 828 | p += size; |
| 829 | m = strchr (q, ':'); |
| 830 | if (m) |
| 831 | ++m; |
| 832 | } |
| 833 | |
| 834 | return p - (char *) ts; |
| 835 | } |
| 836 | \f |
| 837 | /* Cover functions to the vfprintf callbacks. |
| 838 | |
| 839 | ??? If one thinks of the callbacks as a subsystem onto itself [or part of |
| 840 | a larger "remote target subsystem"] with a well defined interface, then |
| 841 | one would think that the subsystem would provide these. However, until |
| 842 | one is allowed to create such a subsystem (with its own source tree |
| 843 | independent of any particular user), such a critter can't exist. Thus |
| 844 | these functions are here for the time being. */ |
| 845 | |
| 846 | void |
| 847 | sim_cb_printf (host_callback *p, const char *fmt, ...) |
| 848 | { |
| 849 | va_list ap; |
| 850 | |
| 851 | va_start (ap, fmt); |
| 852 | p->vprintf_filtered (p, fmt, ap); |
| 853 | va_end (ap); |
| 854 | } |
| 855 | |
| 856 | void |
| 857 | sim_cb_eprintf (host_callback *p, const char *fmt, ...) |
| 858 | { |
| 859 | va_list ap; |
| 860 | |
| 861 | va_start (ap, fmt); |
| 862 | p->evprintf_filtered (p, fmt, ap); |
| 863 | va_end (ap); |
| 864 | } |