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         /*
 227          * File system calls.
 228          */
 229     case TARGET_FREEBSD_NR_read: /* read(2) */
 230         ret = do_bsd_read(arg1, arg2, arg3);
 231         break;
 232
 233     case TARGET_FREEBSD_NR_pread: /* pread(2) */
 234         ret = do_bsd_pread(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 235         break;
 236
 237     case TARGET_FREEBSD_NR_readv: /* readv(2) */
 238         ret = do_bsd_readv(arg1, arg2, arg3);
 239         break;
 240
 241     case TARGET_FREEBSD_NR_preadv: /* preadv(2) */
 242         ret = do_bsd_preadv(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 243
 244     case TARGET_FREEBSD_NR_write: /* write(2) */
 245         ret = do_bsd_write(arg1, arg2, arg3);
 246         break;
 247
 248     case TARGET_FREEBSD_NR_pwrite: /* pwrite(2) */
 249         ret = do_bsd_pwrite(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 250         break;
 251
 252     case TARGET_FREEBSD_NR_writev: /* writev(2) */
 253         ret = do_bsd_writev(arg1, arg2, arg3);
 254         break;
 255
 256     case TARGET_FREEBSD_NR_pwritev: /* pwritev(2) */
 257         ret = do_bsd_pwritev(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 258         break;
 259
 260     case TARGET_FREEBSD_NR_open: /* open(2) */
 261         ret = do_bsd_open(arg1, arg2, arg3);
 262         break;
 263
 264     case TARGET_FREEBSD_NR_openat: /* openat(2) */
 265         ret = do_bsd_openat(arg1, arg2, arg3, arg4);
 266         break;
 267
 268     case TARGET_FREEBSD_NR_close: /* close(2) */
 269         ret = do_bsd_close(arg1);
 270         break;
 271
 272     case TARGET_FREEBSD_NR_fdatasync: /* fdatasync(2) */
 273         ret = do_bsd_fdatasync(arg1);
 274         break;
 275
 276     case TARGET_FREEBSD_NR_fsync: /* fsync(2) */
 277         ret = do_bsd_fsync(arg1);
 278         break;
 279
 280     case TARGET_FREEBSD_NR_freebsd12_closefrom: /* closefrom(2) */
 281         ret = do_bsd_closefrom(arg1);
 282         break;
 283
 284     case TARGET_FREEBSD_NR_revoke: /* revoke(2) */
 285         ret = do_bsd_revoke(arg1);
 286         break;
 287
 288     case TARGET_FREEBSD_NR_access: /* access(2) */
 289         ret = do_bsd_access(arg1, arg2);
 290         break;
 291
 292     case TARGET_FREEBSD_NR_eaccess: /* eaccess(2) */
 293         ret = do_bsd_eaccess(arg1, arg2);
 294         break;
 295
 296     case TARGET_FREEBSD_NR_faccessat: /* faccessat(2) */
 297         ret = do_bsd_faccessat(arg1, arg2, arg3, arg4);
 298         break;
 299
 300     case TARGET_FREEBSD_NR_chdir: /* chdir(2) */
 301         ret = do_bsd_chdir(arg1);
 302         break;
 303
 304     case TARGET_FREEBSD_NR_fchdir: /* fchdir(2) */
 305         ret = do_bsd_fchdir(arg1);
 306         break;
 307
 308     case TARGET_FREEBSD_NR_rename: /* rename(2) */
 309         ret = do_bsd_rename(arg1, arg2);
 310         break;
 311
 312     case TARGET_FREEBSD_NR_renameat: /* renameat(2) */
 313         ret = do_bsd_renameat(arg1, arg2, arg3, arg4);
 314         break;
 315
 316     case TARGET_FREEBSD_NR_link: /* link(2) */
 317         ret = do_bsd_link(arg1, arg2);
 318         break;
 319
 320     case TARGET_FREEBSD_NR_linkat: /* linkat(2) */
 321         ret = do_bsd_linkat(arg1, arg2, arg3, arg4, arg5);
 322         break;
 323
 324     case TARGET_FREEBSD_NR_unlink: /* unlink(2) */
 325         ret = do_bsd_unlink(arg1);
 326         break;
 327
 328     case TARGET_FREEBSD_NR_unlinkat: /* unlinkat(2) */
 329         ret = do_bsd_unlinkat(arg1, arg2, arg3);
 330         break;
 331
 332     case TARGET_FREEBSD_NR_mkdir: /* mkdir(2) */
 333         ret = do_bsd_mkdir(arg1, arg2);
 334         break;
 335
 336     case TARGET_FREEBSD_NR_mkdirat: /* mkdirat(2) */
 337         ret = do_bsd_mkdirat(arg1, arg2, arg3);
 338         break;
 339
 340     case TARGET_FREEBSD_NR_rmdir: /* rmdir(2) (XXX no rmdirat()?) */
 341         ret = do_bsd_rmdir(arg1);
 342         break;
 343
 344     case TARGET_FREEBSD_NR___getcwd: /* undocumented __getcwd() */
 345         ret = do_bsd___getcwd(arg1, arg2);
 346         break;
 347
 348     case TARGET_FREEBSD_NR_dup: /* dup(2) */
 349         ret = do_bsd_dup(arg1);
 350         break;
 351
 352     case TARGET_FREEBSD_NR_dup2: /* dup2(2) */
 353         ret = do_bsd_dup2(arg1, arg2);
 354         break;
 355
 356     case TARGET_FREEBSD_NR_truncate: /* truncate(2) */
 357         ret = do_bsd_truncate(cpu_env, arg1, arg2, arg3, arg4);
 358         break;
 359
 360     case TARGET_FREEBSD_NR_ftruncate: /* ftruncate(2) */
 361         ret = do_bsd_ftruncate(cpu_env, arg1, arg2, arg3, arg4);
 362         break;
 363
 364     case TARGET_FREEBSD_NR_acct: /* acct(2) */
 365         ret = do_bsd_acct(arg1);
 366         break;
 367
 368     case TARGET_FREEBSD_NR_sync: /* sync(2) */
 369         ret = do_bsd_sync();
 370         break;
 371
 372     case TARGET_FREEBSD_NR_mount: /* mount(2) */
 373         ret = do_bsd_mount(arg1, arg2, arg3, arg4);
 374         break;
 375
 376     case TARGET_FREEBSD_NR_unmount: /* unmount(2) */
 377         ret = do_bsd_unmount(arg1, arg2);
 378         break;
 379
 380     case TARGET_FREEBSD_NR_nmount: /* nmount(2) */
 381         ret = do_bsd_nmount(arg1, arg2, arg3);
 382         break;
 383
 384     case TARGET_FREEBSD_NR_symlink: /* symlink(2) */
 385         ret = do_bsd_symlink(arg1, arg2);
 386         break;
 387
 388     case TARGET_FREEBSD_NR_symlinkat: /* symlinkat(2) */
 389         ret = do_bsd_symlinkat(arg1, arg2, arg3);
 390         break;
 391
 392     case TARGET_FREEBSD_NR_readlink: /* readlink(2) */
 393         ret = do_bsd_readlink(cpu_env, arg1, arg2, arg3);
 394         break;
 395
 396     case TARGET_FREEBSD_NR_readlinkat: /* readlinkat(2) */
 397         ret = do_bsd_readlinkat(arg1, arg2, arg3, arg4);
 398         break;
 399
 400     case TARGET_FREEBSD_NR_chmod: /* chmod(2) */
 401         ret = do_bsd_chmod(arg1, arg2);
 402         break;
 403
 404     case TARGET_FREEBSD_NR_fchmod: /* fchmod(2) */
 405         ret = do_bsd_fchmod(arg1, arg2);
 406         break;
 407
 408     case TARGET_FREEBSD_NR_lchmod: /* lchmod(2) */
 409         ret = do_bsd_lchmod(arg1, arg2);
 410         break;
 411
 412     case TARGET_FREEBSD_NR_fchmodat: /* fchmodat(2) */
 413         ret = do_bsd_fchmodat(arg1, arg2, arg3, arg4);
 414         break;
 415
 416     case TARGET_FREEBSD_NR_freebsd11_mknod: /* mknod(2) */
 417         ret = do_bsd_freebsd11_mknod(arg1, arg2, arg3);
 418         break;
 419
 420     case TARGET_FREEBSD_NR_freebsd11_mknodat: /* mknodat(2) */
 421         ret = do_bsd_freebsd11_mknodat(arg1, arg2, arg3, arg4);
 422         break;
 423
 424     case TARGET_FREEBSD_NR_mknodat: /* mknodat(2) */
 425         ret = do_bsd_mknodat(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 426         break;
 427
 428     case TARGET_FREEBSD_NR_chown: /* chown(2) */
 429         ret = do_bsd_chown(arg1, arg2, arg3);
 430         break;
 431
 432     case TARGET_FREEBSD_NR_fchown: /* fchown(2) */
 433         ret = do_bsd_fchown(arg1, arg2, arg3);
 434         break;
 435
 436     case TARGET_FREEBSD_NR_lchown: /* lchown(2) */
 437         ret = do_bsd_lchown(arg1, arg2, arg3);
 438         break;
 439
 440     case TARGET_FREEBSD_NR_fchownat: /* fchownat(2) */
 441         ret = do_bsd_fchownat(arg1, arg2, arg3, arg4, arg5);
 442         break;
 443
 444     case TARGET_FREEBSD_NR_chflags: /* chflags(2) */
 445         ret = do_bsd_chflags(arg1, arg2);
 446         break;
 447
 448     case TARGET_FREEBSD_NR_lchflags: /* lchflags(2) */
 449         ret = do_bsd_lchflags(arg1, arg2);
 450         break;
 451
 452     case TARGET_FREEBSD_NR_fchflags: /* fchflags(2) */
 453         ret = do_bsd_fchflags(arg1, arg2);
 454         break;
 455
 456     case TARGET_FREEBSD_NR_chroot: /* chroot(2) */
 457         ret = do_bsd_chroot(arg1);
 458         break;
 459
 460     case TARGET_FREEBSD_NR_flock: /* flock(2) */
 461         ret = do_bsd_flock(arg1, arg2);
 462         break;
 463
 464     case TARGET_FREEBSD_NR_mkfifo: /* mkfifo(2) */
 465         ret = do_bsd_mkfifo(arg1, arg2);
 466         break;
 467
 468     case TARGET_FREEBSD_NR_mkfifoat: /* mkfifoat(2) */
 469         ret = do_bsd_mkfifoat(arg1, arg2, arg3);
 470         break;
 471
 472     case TARGET_FREEBSD_NR_pathconf: /* pathconf(2) */
 473         ret = do_bsd_pathconf(arg1, arg2);
 474         break;
 475
 476     case TARGET_FREEBSD_NR_lpathconf: /* lpathconf(2) */
 477         ret = do_bsd_lpathconf(arg1, arg2);
 478         break;
 479
 480     case TARGET_FREEBSD_NR_fpathconf: /* fpathconf(2) */
 481         ret = do_bsd_fpathconf(arg1, arg2);
 482         break;
 483
 484     case TARGET_FREEBSD_NR_undelete: /* undelete(2) */
 485         ret = do_bsd_undelete(arg1);
 486         break;
 487
 488         /*
 489          * stat system calls
 490          */
 491     case TARGET_FREEBSD_NR_freebsd11_stat: /* stat(2) */
 492         ret = do_freebsd11_stat(arg1, arg2);
 493         break;
 494
 495     case TARGET_FREEBSD_NR_freebsd11_lstat: /* lstat(2) */
 496         ret = do_freebsd11_lstat(arg1, arg2);
 497         break;
 498
 499     case TARGET_FREEBSD_NR_freebsd11_fstat: /* fstat(2) */
 500         ret = do_freebsd11_fstat(arg1, arg2);
 501         break;
 502
 503     case TARGET_FREEBSD_NR_fstat: /* fstat(2) */
 504         ret = do_freebsd_fstat(arg1, arg2);
 505         break;
 506
 507     case TARGET_FREEBSD_NR_freebsd11_fstatat: /* fstatat(2) */
 508         ret = do_freebsd11_fstatat(arg1, arg2, arg3, arg4);
 509         break;
 510
 511     case TARGET_FREEBSD_NR_fstatat: /* fstatat(2) */
 512         ret = do_freebsd_fstatat(arg1, arg2, arg3, arg4);
 513         break;
 514
 515     case TARGET_FREEBSD_NR_freebsd11_nstat: /* undocumented */
 516         ret = do_freebsd11_nstat(arg1, arg2);
 517         break;
 518
 519     case TARGET_FREEBSD_NR_freebsd11_nfstat: /* undocumented */
 520         ret = do_freebsd11_nfstat(arg1, arg2);
 521         break;
 522
 523     case TARGET_FREEBSD_NR_freebsd11_nlstat: /* undocumented */
 524         ret = do_freebsd11_nlstat(arg1, arg2);
 525         break;
 526
 527     case TARGET_FREEBSD_NR_getfh: /* getfh(2) */
 528         ret = do_freebsd_getfh(arg1, arg2);
 529         break;
 530
 531     case TARGET_FREEBSD_NR_lgetfh: /* lgetfh(2) */
 532         ret = do_freebsd_lgetfh(arg1, arg2);
 533         break;
 534
 535     case TARGET_FREEBSD_NR_fhopen: /* fhopen(2) */
 536         ret = do_freebsd_fhopen(arg1, arg2);
 537         break;
 538
 539     case TARGET_FREEBSD_NR_freebsd11_fhstat: /* fhstat(2) */
 540         ret = do_freebsd11_fhstat(arg1, arg2);
 541         break;
 542
 543     case TARGET_FREEBSD_NR_fhstat: /* fhstat(2) */
 544         ret = do_freebsd_fhstat(arg1, arg2);
 545         break;
 546
 547     case TARGET_FREEBSD_NR_freebsd11_fhstatfs: /* fhstatfs(2) */
 548         ret = do_freebsd11_fhstatfs(arg1, arg2);
 549         break;
 550
 551     case TARGET_FREEBSD_NR_fhstatfs: /* fhstatfs(2) */
 552         ret = do_freebsd_fhstatfs(arg1, arg2);
 553         break;
 554
 555     case TARGET_FREEBSD_NR_freebsd11_statfs: /* statfs(2) */
 556         ret = do_freebsd11_statfs(arg1, arg2);
 557         break;
 558
 559     case TARGET_FREEBSD_NR_statfs: /* statfs(2) */
 560         ret = do_freebsd_statfs(arg1, arg2);
 561         break;
 562
 563     case TARGET_FREEBSD_NR_freebsd11_fstatfs: /* fstatfs(2) */
 564         ret = do_freebsd11_fstatfs(arg1, arg2);
 565         break;
 566
 567     case TARGET_FREEBSD_NR_fstatfs: /* fstatfs(2) */
 568         ret = do_freebsd_fstatfs(arg1, arg2);
 569         break;
 570
 571     case TARGET_FREEBSD_NR_freebsd11_getfsstat: /* getfsstat(2) */
 572         ret = do_freebsd11_getfsstat(arg1, arg2, arg3);
 573         break;
 574
 575     case TARGET_FREEBSD_NR_getfsstat: /* getfsstat(2) */
 576         ret = do_freebsd_getfsstat(arg1, arg2, arg3);
 577         break;
 578
 579     case TARGET_FREEBSD_NR_freebsd11_getdents: /* getdents(2) */
 580         ret = do_freebsd11_getdents(arg1, arg2, arg3);
 581         break;
 582
 583     case TARGET_FREEBSD_NR_getdirentries: /* getdirentries(2) */
 584         ret = do_freebsd_getdirentries(arg1, arg2, arg3, arg4);
 585         break;
 586
 587     case TARGET_FREEBSD_NR_freebsd11_getdirentries: /* getdirentries(2) */
 588         ret = do_freebsd11_getdirentries(arg1, arg2, arg3, arg4);
 589         break;
 590     case TARGET_FREEBSD_NR_fcntl: /* fcntl(2) */
 591         ret = do_freebsd_fcntl(arg1, arg2, arg3);
 592         break;
 593
 594
 595         /*
 596          * sys{ctl, arch, call}
 597          */
 598     case TARGET_FREEBSD_NR___sysctl: /* sysctl(3) */
 599         ret = do_freebsd_sysctl(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 600         break;
 601
 602     case TARGET_FREEBSD_NR___sysctlbyname: /* sysctlbyname(2) */
 603         ret = do_freebsd_sysctlbyname(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
 604         break;
 605
 606     case TARGET_FREEBSD_NR_sysarch: /* sysarch(2) */
 607         ret = do_freebsd_sysarch(cpu_env, arg1, arg2);
 608         break;
 609
 610     default:
 611         qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
 612         ret = -TARGET_ENOSYS;
 613         break;
 614     }
 615
 616     return ret;
 617 }
 618
 619 /*
 620  * do_freebsd_syscall() should always have a single exit point at the end so
 621  * that actions, such as logging of syscall results, can be performed. This
 622  * as a wrapper around freebsd_syscall() so that actually happens. Since
 623  * that is a singleton, modern compilers will inline it anyway...
 624  */
 625 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
 626                             abi_long arg2, abi_long arg3, abi_long arg4,
 627                             abi_long arg5, abi_long arg6, abi_long arg7,
 628                             abi_long arg8)
 629 {
 630     abi_long ret;
 631
 632     if (do_strace) {
 633         print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
 634     }
 635
 636     ret = freebsd_syscall(cpu_env, num, arg1, arg2, arg3, arg4, arg5, arg6,
 637                           arg7, arg8);
 638     if (do_strace) {
 639         print_freebsd_syscall_ret(num, ret);
 640     }
 641
 642     return ret;
 643 }
 644
 645 void syscall_init(void)
 646 {
 647 }