bsd-user/freebsd/os-syscall.c

   1 /*
   2  *  BSD syscalls
   3  *
   4  *  Copyright (c) 2003-2008 Fabrice Bellard
   5  *  Copyright (c) 2013-2014 Stacey D. Son
   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, see <http://www.gnu.org/licenses/>.
  19  */
  20 #include "qemu/osdep.h"
  21 #include "qemu/cutils.h"
  22 #include "qemu/path.h"
  23 #include <sys/syscall.h>
  24 #include <sys/cdefs.h>
  25 #include <sys/param.h>
  26 #include <sys/mount.h>
  27 #include <sys/sysctl.h>
  28 #include <utime.h>
  29
  30 #include "include/gdbstub/syscalls.h"
  31
  32 #include "qemu.h"
  33 #include "signal-common.h"
  34 #include "user/syscall-trace.h"
  35
  36 #include "bsd-file.h"
  37 #include "bsd-proc.h"
  38
  39 /* *BSD dependent syscall shims */
  40 #include "os-stat.h"
  41
  42 /* I/O */
  43 safe_syscall3(int, open, const char *, path, int, flags, mode_t, mode);
  44 safe_syscall4(int, openat, int, fd, const char *, path, int, flags, mode_t,
  45     mode);
  46
  47 safe_syscall3(ssize_t, read, int, fd, void *, buf, size_t, nbytes);
  48 safe_syscall4(ssize_t, pread, int, fd, void *, buf, size_t, nbytes, off_t,
  49     offset);
  50 safe_syscall3(ssize_t, readv, int, fd, const struct iovec *, iov, int, iovcnt);
  51 safe_syscall4(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt,
  52     off_t, offset);
  53
  54 safe_syscall3(ssize_t, write, int, fd, void *, buf, size_t, nbytes);
  55 safe_syscall4(ssize_t, pwrite, int, fd, void *, buf, size_t, nbytes, off_t,
  56     offset);
  57 safe_syscall3(ssize_t, writev, int, fd, const struct iovec *, iov, int, iovcnt);
  58 safe_syscall4(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt,
  59     off_t, offset);
  60
  61 void target_set_brk(abi_ulong new_brk)
  62 {
  63 }
  64
  65 /*
  66  * errno conversion.
  67  */
  68 abi_long get_errno(abi_long ret)
  69 {
  70     if (ret == -1) {
  71         return -host_to_target_errno(errno);
  72     } else {
  73         return ret;
  74     }
  75 }
  76
  77 int host_to_target_errno(int err)
  78 {
  79     /*
  80      * All the BSDs have the property that the error numbers are uniform across
  81      * all architectures for a given BSD, though they may vary between different
  82      * BSDs.
  83      */
  84     return err;
  85 }
  86
  87 bool is_error(abi_long ret)
  88 {
  89     return (abi_ulong)ret >= (abi_ulong)(-4096);
  90 }
  91
  92 /*
  93  * Unlocks a iovec. Unlike unlock_iovec, it assumes the tvec array itself is
  94  * already locked from target_addr. It will be unlocked as well as all the iovec
  95  * elements.
  96  */
  97 static void helper_unlock_iovec(struct target_iovec *target_vec,
  98                                 abi_ulong target_addr, struct iovec *vec,
  99                                 int count, int copy)
 100 {
 101     for (int i = 0; i < count; i++) {
 102         abi_ulong base = tswapal(target_vec[i].iov_base);
 103
 104         if (vec[i].iov_base) {
 105             unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
 106         }
 107     }
 108     unlock_user(target_vec, target_addr, 0);
 109 }
 110
 111 struct iovec *lock_iovec(int type, abi_ulong target_addr,
 112         int count, int copy)
 113 {
 114     struct target_iovec *target_vec;
 115     struct iovec *vec;
 116     abi_ulong total_len, max_len;
 117     int i;
 118     int err = 0;
 119
 120     if (count == 0) {
 121         errno = 0;
 122         return NULL;
 123     }
 124     if (count < 0 || count > IOV_MAX) {
 125         errno = EINVAL;
 126         return NULL;
 127     }
 128
 129     vec = g_try_new0(struct iovec, count);
 130     if (vec == NULL) {
 131         errno = ENOMEM;
 132         return NULL;
 133     }
 134
 135     target_vec = lock_user(VERIFY_READ, target_addr,
 136                            count * sizeof(struct target_iovec), 1);
 137     if (target_vec == NULL) {
 138         err = EFAULT;
 139         goto fail2;
 140     }
 141
 142     max_len = 0x7fffffff & MIN(TARGET_PAGE_MASK, PAGE_MASK);
 143     total_len = 0;
 144
 145     for (i = 0; i < count; i++) {
 146         abi_ulong base = tswapal(target_vec[i].iov_base);
 147         abi_long len = tswapal(target_vec[i].iov_len);
 148
 149         if (len < 0) {
 150             err = EINVAL;
 151             goto fail;
 152         } else if (len == 0) {
 153             /* Zero length pointer is ignored. */
 154             vec[i].iov_base = 0;
 155         } else {
 156             vec[i].iov_base = lock_user(type, base, len, copy);
 157             /*
 158              * If the first buffer pointer is bad, this is a fault.  But
 159              * subsequent bad buffers will result in a partial write; this is
 160              * realized by filling the vector with null pointers and zero
 161              * lengths.
 162              */
 163             if (!vec[i].iov_base) {
 164                 if (i == 0) {
 165                     err = EFAULT;
 166                     goto fail;
 167                 } else {
 168                     /*
 169                      * Fail all the subsequent addresses, they are already
 170                      * zero'd.
 171                      */
 172                     goto out;
 173                 }
 174             }
 175             if (len > max_len - total_len) {
 176                 len = max_len - total_len;
 177             }
 178         }
 179         vec[i].iov_len = len;
 180         total_len += len;
 181     }
 182 out:
 183     unlock_user(target_vec, target_addr, 0);
 184     return vec;
 185
 186 fail:
 187     helper_unlock_iovec(target_vec, target_addr, vec, i, copy);
 188 fail2:
 189     g_free(vec);
 190     errno = err;
 191     return NULL;
 192 }
 193
 194 void unlock_iovec(struct iovec *vec, abi_ulong target_addr,
 195         int count, int copy)
 196 {
 197     struct target_iovec *target_vec;
 198
 199     target_vec = lock_user(VERIFY_READ, target_addr,
 200                            count * sizeof(struct target_iovec), 1);
 201     if (target_vec) {
 202         helper_unlock_iovec(target_vec, target_addr, vec, count, copy);
 203     }
 204
 205     g_free(vec);
 206 }
 207
 208 /*
 209  * All errnos that freebsd_syscall() returns must be -TARGET_<errcode>.
 210  */
 211 static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
 212                                 abi_long arg2, abi_long arg3, abi_long arg4,
 213                                 abi_long arg5, abi_long arg6, abi_long arg7,
 214                                 abi_long arg8)
 215 {
 216     abi_long ret;
 217
 218     switch (num) {
 219         /*
 220          * process system calls
 221          */
 222     case TARGET_FREEBSD_NR_exit: /* exit(2) */
 223         ret = do_bsd_exit(cpu_env, arg1);
 224         break;
 225
 226     case TARGET_FREEBSD_NR_getgroups: /* getgroups(2) */
 227         ret = do_bsd_getgroups(arg1, arg2);
 228         break;
 229
 230     case TARGET_FREEBSD_NR_setgroups: /* setgroups(2) */
 231         ret = do_bsd_setgroups(arg1, arg2);
 232         break;
 233
 234     case TARGET_FREEBSD_NR_umask: /* umask(2) */
 235         ret = do_bsd_umask(arg1);
 236         break;
 237
 238     case TARGET_FREEBSD_NR_setlogin: /* setlogin(2) */
 239         ret = do_bsd_setlogin(arg1);
 240         break;
 241
 242     case TARGET_FREEBSD_NR_getlogin: /* getlogin(2) */
 243         ret = do_bsd_getlogin(arg1, arg2);
 244         break;
 245
 246     case TARGET_FREEBSD_NR_getrusage: /* getrusage(2) */
 247         ret = do_bsd_getrusage(arg1, arg2);
 248         break;
 249
 250     case TARGET_FREEBSD_NR_getrlimit: /* getrlimit(2) */
 251         ret = do_bsd_getrlimit(arg1, arg2);
 252         break;
 253
 254     case TARGET_FREEBSD_NR_setrlimit: /* setrlimit(2) */
 255         ret = do_bsd_setrlimit(arg1, arg2);
 256         break;
 257
 258
 259         /*
 260          * File system calls.
 261          */
 262     case TARGET_FREEBSD_NR_read: /* read(2) */
 263         ret = do_bsd_read(arg1, arg2, arg3);
 264         break;
 265
 266     case TARGET_FREEBSD_NR_pread: /* pread(2) */
 267         ret = do_bsd_pread(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 268         break;
 269
 270     case TARGET_FREEBSD_NR_readv: /* readv(2) */
 271         ret = do_bsd_readv(arg1, arg2, arg3);
 272         break;
 273
 274     case TARGET_FREEBSD_NR_preadv: /* preadv(2) */
 275         ret = do_bsd_preadv(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 276         break;
 277
 278     case TARGET_FREEBSD_NR_write: /* write(2) */
 279         ret = do_bsd_write(arg1, arg2, arg3);
 280         break;
 281
 282     case TARGET_FREEBSD_NR_pwrite: /* pwrite(2) */
 283         ret = do_bsd_pwrite(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 284         break;
 285
 286     case TARGET_FREEBSD_NR_writev: /* writev(2) */
 287         ret = do_bsd_writev(arg1, arg2, arg3);
 288         break;
 289
 290     case TARGET_FREEBSD_NR_pwritev: /* pwritev(2) */
 291         ret = do_bsd_pwritev(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 292         break;
 293
 294     case TARGET_FREEBSD_NR_open: /* open(2) */
 295         ret = do_bsd_open(arg1, arg2, arg3);
 296         break;
 297
 298     case TARGET_FREEBSD_NR_openat: /* openat(2) */
 299         ret = do_bsd_openat(arg1, arg2, arg3, arg4);
 300         break;
 301
 302     case TARGET_FREEBSD_NR_close: /* close(2) */
 303         ret = do_bsd_close(arg1);
 304         break;
 305
 306     case TARGET_FREEBSD_NR_fdatasync: /* fdatasync(2) */
 307         ret = do_bsd_fdatasync(arg1);
 308         break;
 309
 310     case TARGET_FREEBSD_NR_fsync: /* fsync(2) */
 311         ret = do_bsd_fsync(arg1);
 312         break;
 313
 314     case TARGET_FREEBSD_NR_freebsd12_closefrom: /* closefrom(2) */
 315         ret = do_bsd_closefrom(arg1);
 316         break;
 317
 318     case TARGET_FREEBSD_NR_revoke: /* revoke(2) */
 319         ret = do_bsd_revoke(arg1);
 320         break;
 321
 322     case TARGET_FREEBSD_NR_access: /* access(2) */
 323         ret = do_bsd_access(arg1, arg2);
 324         break;
 325
 326     case TARGET_FREEBSD_NR_eaccess: /* eaccess(2) */
 327         ret = do_bsd_eaccess(arg1, arg2);
 328         break;
 329
 330     case TARGET_FREEBSD_NR_faccessat: /* faccessat(2) */
 331         ret = do_bsd_faccessat(arg1, arg2, arg3, arg4);
 332         break;
 333
 334     case TARGET_FREEBSD_NR_chdir: /* chdir(2) */
 335         ret = do_bsd_chdir(arg1);
 336         break;
 337
 338     case TARGET_FREEBSD_NR_fchdir: /* fchdir(2) */
 339         ret = do_bsd_fchdir(arg1);
 340         break;
 341
 342     case TARGET_FREEBSD_NR_rename: /* rename(2) */
 343         ret = do_bsd_rename(arg1, arg2);
 344         break;
 345
 346     case TARGET_FREEBSD_NR_renameat: /* renameat(2) */
 347         ret = do_bsd_renameat(arg1, arg2, arg3, arg4);
 348         break;
 349
 350     case TARGET_FREEBSD_NR_link: /* link(2) */
 351         ret = do_bsd_link(arg1, arg2);
 352         break;
 353
 354     case TARGET_FREEBSD_NR_linkat: /* linkat(2) */
 355         ret = do_bsd_linkat(arg1, arg2, arg3, arg4, arg5);
 356         break;
 357
 358     case TARGET_FREEBSD_NR_unlink: /* unlink(2) */
 359         ret = do_bsd_unlink(arg1);
 360         break;
 361
 362     case TARGET_FREEBSD_NR_unlinkat: /* unlinkat(2) */
 363         ret = do_bsd_unlinkat(arg1, arg2, arg3);
 364         break;
 365
 366     case TARGET_FREEBSD_NR_mkdir: /* mkdir(2) */
 367         ret = do_bsd_mkdir(arg1, arg2);
 368         break;
 369
 370     case TARGET_FREEBSD_NR_mkdirat: /* mkdirat(2) */
 371         ret = do_bsd_mkdirat(arg1, arg2, arg3);
 372         break;
 373
 374     case TARGET_FREEBSD_NR_rmdir: /* rmdir(2) (XXX no rmdirat()?) */
 375         ret = do_bsd_rmdir(arg1);
 376         break;
 377
 378     case TARGET_FREEBSD_NR___getcwd: /* undocumented __getcwd() */
 379         ret = do_bsd___getcwd(arg1, arg2);
 380         break;
 381
 382     case TARGET_FREEBSD_NR_dup: /* dup(2) */
 383         ret = do_bsd_dup(arg1);
 384         break;
 385
 386     case TARGET_FREEBSD_NR_dup2: /* dup2(2) */
 387         ret = do_bsd_dup2(arg1, arg2);
 388         break;
 389
 390     case TARGET_FREEBSD_NR_truncate: /* truncate(2) */
 391         ret = do_bsd_truncate(cpu_env, arg1, arg2, arg3, arg4);
 392         break;
 393
 394     case TARGET_FREEBSD_NR_ftruncate: /* ftruncate(2) */
 395         ret = do_bsd_ftruncate(cpu_env, arg1, arg2, arg3, arg4);
 396         break;
 397
 398     case TARGET_FREEBSD_NR_acct: /* acct(2) */
 399         ret = do_bsd_acct(arg1);
 400         break;
 401
 402     case TARGET_FREEBSD_NR_sync: /* sync(2) */
 403         ret = do_bsd_sync();
 404         break;
 405
 406     case TARGET_FREEBSD_NR_mount: /* mount(2) */
 407         ret = do_bsd_mount(arg1, arg2, arg3, arg4);
 408         break;
 409
 410     case TARGET_FREEBSD_NR_unmount: /* unmount(2) */
 411         ret = do_bsd_unmount(arg1, arg2);
 412         break;
 413
 414     case TARGET_FREEBSD_NR_nmount: /* nmount(2) */
 415         ret = do_bsd_nmount(arg1, arg2, arg3);
 416         break;
 417
 418     case TARGET_FREEBSD_NR_symlink: /* symlink(2) */
 419         ret = do_bsd_symlink(arg1, arg2);
 420         break;
 421
 422     case TARGET_FREEBSD_NR_symlinkat: /* symlinkat(2) */
 423         ret = do_bsd_symlinkat(arg1, arg2, arg3);
 424         break;
 425
 426     case TARGET_FREEBSD_NR_readlink: /* readlink(2) */
 427         ret = do_bsd_readlink(cpu_env, arg1, arg2, arg3);
 428         break;
 429
 430     case TARGET_FREEBSD_NR_readlinkat: /* readlinkat(2) */
 431         ret = do_bsd_readlinkat(arg1, arg2, arg3, arg4);
 432         break;
 433
 434     case TARGET_FREEBSD_NR_chmod: /* chmod(2) */
 435         ret = do_bsd_chmod(arg1, arg2);
 436         break;
 437
 438     case TARGET_FREEBSD_NR_fchmod: /* fchmod(2) */
 439         ret = do_bsd_fchmod(arg1, arg2);
 440         break;
 441
 442     case TARGET_FREEBSD_NR_lchmod: /* lchmod(2) */
 443         ret = do_bsd_lchmod(arg1, arg2);
 444         break;
 445
 446     case TARGET_FREEBSD_NR_fchmodat: /* fchmodat(2) */
 447         ret = do_bsd_fchmodat(arg1, arg2, arg3, arg4);
 448         break;
 449
 450     case TARGET_FREEBSD_NR_freebsd11_mknod: /* mknod(2) */
 451         ret = do_bsd_freebsd11_mknod(arg1, arg2, arg3);
 452         break;
 453
 454     case TARGET_FREEBSD_NR_freebsd11_mknodat: /* mknodat(2) */
 455         ret = do_bsd_freebsd11_mknodat(arg1, arg2, arg3, arg4);
 456         break;
 457
 458     case TARGET_FREEBSD_NR_mknodat: /* mknodat(2) */
 459         ret = do_bsd_mknodat(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 460         break;
 461
 462     case TARGET_FREEBSD_NR_chown: /* chown(2) */
 463         ret = do_bsd_chown(arg1, arg2, arg3);
 464         break;
 465
 466     case TARGET_FREEBSD_NR_fchown: /* fchown(2) */
 467         ret = do_bsd_fchown(arg1, arg2, arg3);
 468         break;
 469
 470     case TARGET_FREEBSD_NR_lchown: /* lchown(2) */
 471         ret = do_bsd_lchown(arg1, arg2, arg3);
 472         break;
 473
 474     case TARGET_FREEBSD_NR_fchownat: /* fchownat(2) */
 475         ret = do_bsd_fchownat(arg1, arg2, arg3, arg4, arg5);
 476         break;
 477
 478     case TARGET_FREEBSD_NR_chflags: /* chflags(2) */
 479         ret = do_bsd_chflags(arg1, arg2);
 480         break;
 481
 482     case TARGET_FREEBSD_NR_lchflags: /* lchflags(2) */
 483         ret = do_bsd_lchflags(arg1, arg2);
 484         break;
 485
 486     case TARGET_FREEBSD_NR_fchflags: /* fchflags(2) */
 487         ret = do_bsd_fchflags(arg1, arg2);
 488         break;
 489
 490     case TARGET_FREEBSD_NR_chroot: /* chroot(2) */
 491         ret = do_bsd_chroot(arg1);
 492         break;
 493
 494     case TARGET_FREEBSD_NR_flock: /* flock(2) */
 495         ret = do_bsd_flock(arg1, arg2);
 496         break;
 497
 498     case TARGET_FREEBSD_NR_mkfifo: /* mkfifo(2) */
 499         ret = do_bsd_mkfifo(arg1, arg2);
 500         break;
 501
 502     case TARGET_FREEBSD_NR_mkfifoat: /* mkfifoat(2) */
 503         ret = do_bsd_mkfifoat(arg1, arg2, arg3);
 504         break;
 505
 506     case TARGET_FREEBSD_NR_pathconf: /* pathconf(2) */
 507         ret = do_bsd_pathconf(arg1, arg2);
 508         break;
 509
 510     case TARGET_FREEBSD_NR_lpathconf: /* lpathconf(2) */
 511         ret = do_bsd_lpathconf(arg1, arg2);
 512         break;
 513
 514     case TARGET_FREEBSD_NR_fpathconf: /* fpathconf(2) */
 515         ret = do_bsd_fpathconf(arg1, arg2);
 516         break;
 517
 518     case TARGET_FREEBSD_NR_undelete: /* undelete(2) */
 519         ret = do_bsd_undelete(arg1);
 520         break;
 521
 522         /*
 523          * stat system calls
 524          */
 525     case TARGET_FREEBSD_NR_freebsd11_stat: /* stat(2) */
 526         ret = do_freebsd11_stat(arg1, arg2);
 527         break;
 528
 529     case TARGET_FREEBSD_NR_freebsd11_lstat: /* lstat(2) */
 530         ret = do_freebsd11_lstat(arg1, arg2);
 531         break;
 532
 533     case TARGET_FREEBSD_NR_freebsd11_fstat: /* fstat(2) */
 534         ret = do_freebsd11_fstat(arg1, arg2);
 535         break;
 536
 537     case TARGET_FREEBSD_NR_fstat: /* fstat(2) */
 538         ret = do_freebsd_fstat(arg1, arg2);
 539         break;
 540
 541     case TARGET_FREEBSD_NR_freebsd11_fstatat: /* fstatat(2) */
 542         ret = do_freebsd11_fstatat(arg1, arg2, arg3, arg4);
 543         break;
 544
 545     case TARGET_FREEBSD_NR_fstatat: /* fstatat(2) */
 546         ret = do_freebsd_fstatat(arg1, arg2, arg3, arg4);
 547         break;
 548
 549     case TARGET_FREEBSD_NR_freebsd11_nstat: /* undocumented */
 550         ret = do_freebsd11_nstat(arg1, arg2);
 551         break;
 552
 553     case TARGET_FREEBSD_NR_freebsd11_nfstat: /* undocumented */
 554         ret = do_freebsd11_nfstat(arg1, arg2);
 555         break;
 556
 557     case TARGET_FREEBSD_NR_freebsd11_nlstat: /* undocumented */
 558         ret = do_freebsd11_nlstat(arg1, arg2);
 559         break;
 560
 561     case TARGET_FREEBSD_NR_getfh: /* getfh(2) */
 562         ret = do_freebsd_getfh(arg1, arg2);
 563         break;
 564
 565     case TARGET_FREEBSD_NR_lgetfh: /* lgetfh(2) */
 566         ret = do_freebsd_lgetfh(arg1, arg2);
 567         break;
 568
 569     case TARGET_FREEBSD_NR_fhopen: /* fhopen(2) */
 570         ret = do_freebsd_fhopen(arg1, arg2);
 571         break;
 572
 573     case TARGET_FREEBSD_NR_freebsd11_fhstat: /* fhstat(2) */
 574         ret = do_freebsd11_fhstat(arg1, arg2);
 575         break;
 576
 577     case TARGET_FREEBSD_NR_fhstat: /* fhstat(2) */
 578         ret = do_freebsd_fhstat(arg1, arg2);
 579         break;
 580
 581     case TARGET_FREEBSD_NR_freebsd11_fhstatfs: /* fhstatfs(2) */
 582         ret = do_freebsd11_fhstatfs(arg1, arg2);
 583         break;
 584
 585     case TARGET_FREEBSD_NR_fhstatfs: /* fhstatfs(2) */
 586         ret = do_freebsd_fhstatfs(arg1, arg2);
 587         break;
 588
 589     case TARGET_FREEBSD_NR_freebsd11_statfs: /* statfs(2) */
 590         ret = do_freebsd11_statfs(arg1, arg2);
 591         break;
 592
 593     case TARGET_FREEBSD_NR_statfs: /* statfs(2) */
 594         ret = do_freebsd_statfs(arg1, arg2);
 595         break;
 596
 597     case TARGET_FREEBSD_NR_freebsd11_fstatfs: /* fstatfs(2) */
 598         ret = do_freebsd11_fstatfs(arg1, arg2);
 599         break;
 600
 601     case TARGET_FREEBSD_NR_fstatfs: /* fstatfs(2) */
 602         ret = do_freebsd_fstatfs(arg1, arg2);
 603         break;
 604
 605     case TARGET_FREEBSD_NR_freebsd11_getfsstat: /* getfsstat(2) */
 606         ret = do_freebsd11_getfsstat(arg1, arg2, arg3);
 607         break;
 608
 609     case TARGET_FREEBSD_NR_getfsstat: /* getfsstat(2) */
 610         ret = do_freebsd_getfsstat(arg1, arg2, arg3);
 611         break;
 612
 613     case TARGET_FREEBSD_NR_freebsd11_getdents: /* getdents(2) */
 614         ret = do_freebsd11_getdents(arg1, arg2, arg3);
 615         break;
 616
 617     case TARGET_FREEBSD_NR_getdirentries: /* getdirentries(2) */
 618         ret = do_freebsd_getdirentries(arg1, arg2, arg3, arg4);
 619         break;
 620
 621     case TARGET_FREEBSD_NR_freebsd11_getdirentries: /* getdirentries(2) */
 622         ret = do_freebsd11_getdirentries(arg1, arg2, arg3, arg4);
 623         break;
 624     case TARGET_FREEBSD_NR_fcntl: /* fcntl(2) */
 625         ret = do_freebsd_fcntl(arg1, arg2, arg3);
 626         break;
 627
 628
 629         /*
 630          * sys{ctl, arch, call}
 631          */
 632     case TARGET_FREEBSD_NR___sysctl: /* sysctl(3) */
 633         ret = do_freebsd_sysctl(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 634         break;
 635
 636     case TARGET_FREEBSD_NR___sysctlbyname: /* sysctlbyname(2) */
 637         ret = do_freebsd_sysctlbyname(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 638         break;
 639
 640     case TARGET_FREEBSD_NR_sysarch: /* sysarch(2) */
 641         ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
 642         break;
 643
 644     default:
 645         qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
 646         ret = -TARGET_ENOSYS;
 647         break;
 648     }
 649
 650     return ret;
 651 }
 652
 653 /*
 654  * do_freebsd_syscall() should always have a single exit point at the end so
 655  * that actions, such as logging of syscall results, can be performed. This
 656  * as a wrapper around freebsd_syscall() so that actually happens. Since
 657  * that is a singleton, modern compilers will inline it anyway...
 658  */
 659 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
 660                             abi_long arg2, abi_long arg3, abi_long arg4,
 661                             abi_long arg5, abi_long arg6, abi_long arg7,
 662                             abi_long arg8)
 663 {
 664     abi_long ret;
 665
 666     if (do_strace) {
 667         print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
 668     }
 669
 670     ret = freebsd_syscall(cpu_env, num, arg1, arg2, arg3, arg4, arg5, arg6,
 671                           arg7, arg8);
 672     if (do_strace) {
 673         print_freebsd_syscall_ret(num, ret);
 674     }
 675
 676     return ret;
 677 }
 678
 679 void syscall_init(void)
 680 {
 681 }