sys/emulation/linux/linux_misc.c

   1 /*-
   2  * Copyright (c) 1994-1995 Søren Schmidt
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software withough specific prior written permission
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/compat/linux/linux_misc.c,v 1.85.2.9 2002/09/24 08:11:41 mdodd Exp $
  29  * $DragonFly: src/sys/emulation/linux/linux_misc.c,v 1.39 2007/06/26 19:31:03 dillon Exp $
  30  */
  31
  32 #include "opt_compat.h"
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/fcntl.h>
  37 #include <sys/imgact_aout.h>
  38 #include <sys/kernel.h>
  39 #include <sys/kern_syscall.h>
  40 #include <sys/lock.h>
  41 #include <sys/mman.h>
  42 #include <sys/mount.h>
  43 #include <sys/poll.h>
  44 #include <sys/proc.h>
  45 #include <sys/priv.h>
  46 #include <sys/nlookup.h>
  47 #include <sys/blist.h>
  48 #include <sys/reboot.h>
  49 #include <sys/resourcevar.h>
  50 #include <sys/signalvar.h>
  51 #include <sys/stat.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/sysproto.h>
  54 #include <sys/time.h>
  55 #include <sys/unistd.h>
  56 #include <sys/vmmeter.h>
  57 #include <sys/vnode.h>
  58 #include <sys/wait.h>
  59
  60 #include <sys/signal2.h>
  61 #include <sys/thread2.h>
  62 #include <sys/mplock2.h>
  63
  64 #include <vm/vm.h>
  65 #include <vm/pmap.h>
  66 #include <vm/vm_kern.h>
  67 #include <vm/vm_map.h>
  68 #include <vm/vm_extern.h>
  69 #include <vm/vm_object.h>
  70 #include <vm/vm_zone.h>
  71 #include <vm/swap_pager.h>
  72
  73 #include <machine/frame.h>
  74 #include <machine/limits.h>
  75 #include <machine/psl.h>
  76 #include <machine/sysarch.h>
  77 #ifdef __i386__
  78 #include <machine/segments.h>
  79 #endif
  80
  81 #include <sys/sched.h>
  82
  83 #include <emulation/linux/linux_sysproto.h>
  84 #include <arch_linux/linux.h>
  85 #include <arch_linux/linux_proto.h>
  86 #include "linux_mib.h"
  87 #include "linux_util.h"
  88
  89 #define BSD_TO_LINUX_SIGNAL(sig)        \
  90         (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig)
  91
  92 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
  93         RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
  94         RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
  95         RLIMIT_MEMLOCK, -1
  96 };
  97
  98 struct l_sysinfo {
  99         l_long          uptime;         /* Seconds since boot */
 100         l_ulong         loads[3];       /* 1, 5, and 15 minute load averages */
 101         l_ulong         totalram;       /* Total usable main memory size */
 102         l_ulong         freeram;        /* Available memory size */
 103         l_ulong         sharedram;      /* Amount of shared memory */
 104         l_ulong         bufferram;      /* Memory used by buffers */
 105         l_ulong         totalswap;      /* Total swap space size */
 106         l_ulong         freeswap;       /* swap space still available */
 107         l_ushort        procs;          /* Number of current processes */
 108         char            _f[22];         /* Pads structure to 64 bytes */
 109 };
 110
 111 /*
 112  * MPALMOSTSAFE
 113  */
 114 int
 115 sys_linux_sysinfo(struct linux_sysinfo_args *args)
 116 {
 117         struct l_sysinfo sysinfo;
 118         vm_object_t object;
 119         struct timespec ts;
 120         int error;
 121         int i;
 122
 123         /* Uptime is copied out of print_uptime() in kern_shutdown.c */
 124         getnanouptime(&ts);
 125         i = 0;
 126         if (ts.tv_sec >= 86400) {
 127                 ts.tv_sec %= 86400;
 128                 i = 1;
 129         }
 130         if (i || ts.tv_sec >= 3600) {
 131                 ts.tv_sec %= 3600;
 132                 i = 1;
 133         }
 134         if (i || ts.tv_sec >= 60) {
 135                 ts.tv_sec %= 60;
 136                 i = 1;
 137         }
 138         sysinfo.uptime=ts.tv_sec;
 139
 140         /* Use the information from the mib to get our load averages */
 141         for (i = 0; i < 3; i++)
 142                 sysinfo.loads[i] = averunnable.ldavg[i];
 143
 144         sysinfo.totalram = Maxmem * PAGE_SIZE;
 145         sysinfo.freeram = sysinfo.totalram - vmstats.v_wire_count * PAGE_SIZE;
 146
 147         get_mplock();
 148         sysinfo.sharedram = 0;
 149         for (object = TAILQ_FIRST(&vm_object_list); object != NULL;
 150              object = TAILQ_NEXT(object, object_list))
 151                 if (object->shadow_count > 1)
 152                         sysinfo.sharedram += object->resident_page_count;
 153
 154         sysinfo.sharedram *= PAGE_SIZE;
 155         sysinfo.bufferram = 0;
 156
 157         if (swapblist == NULL) {
 158                 sysinfo.totalswap= 0;
 159                 sysinfo.freeswap = 0;
 160         } else {
 161                 sysinfo.totalswap = swapblist->bl_blocks * 1024;
 162                 sysinfo.freeswap = swapblist->bl_root->u.bmu_avail * PAGE_SIZE;
 163         }
 164         rel_mplock();
 165
 166         sysinfo.procs = 20; /* Hack */
 167
 168         error = copyout(&sysinfo, (caddr_t)args->info, sizeof(sysinfo));
 169         return (error);
 170 }
 171
 172 /*
 173  * MPALMOSTSAFE
 174  */
 175 int
 176 sys_linux_alarm(struct linux_alarm_args *args)
 177 {
 178         struct thread *td = curthread;
 179         struct proc *p = td->td_proc;
 180         struct itimerval it, old_it;
 181         struct timeval tv;
 182
 183 #ifdef DEBUG
 184         if (ldebug(alarm))
 185                 kprintf(ARGS(alarm, "%u"), args->secs);
 186 #endif
 187
 188         if (args->secs > 100000000)
 189                 return EINVAL;
 190
 191         it.it_value.tv_sec = (long)args->secs;
 192         it.it_value.tv_usec = 0;
 193         it.it_interval.tv_sec = 0;
 194         it.it_interval.tv_usec = 0;
 195         get_mplock();
 196         crit_enter();
 197         old_it = p->p_realtimer;
 198         getmicrouptime(&tv);
 199         if (timevalisset(&old_it.it_value))
 200                 callout_stop(&p->p_ithandle);
 201         if (it.it_value.tv_sec != 0) {
 202                 callout_reset(&p->p_ithandle, tvtohz_high(&it.it_value),
 203                              realitexpire, p);
 204                 timevaladd(&it.it_value, &tv);
 205         }
 206         p->p_realtimer = it;
 207         crit_exit();
 208         rel_mplock();
 209         if (timevalcmp(&old_it.it_value, &tv, >)) {
 210                 timevalsub(&old_it.it_value, &tv);
 211                 if (old_it.it_value.tv_usec != 0)
 212                         old_it.it_value.tv_sec++;
 213                 args->sysmsg_result = old_it.it_value.tv_sec;
 214         }
 215         return 0;
 216 }
 217
 218 /*
 219  * MPALMOSTSAFE
 220  */
 221 int
 222 sys_linux_brk(struct linux_brk_args *args)
 223 {
 224         struct thread *td = curthread;
 225         struct proc *p = td->td_proc;
 226         struct vmspace *vm;
 227         vm_offset_t new, old;
 228         struct obreak_args bsd_args;
 229
 230         get_mplock();
 231         vm = p->p_vmspace;
 232 #ifdef DEBUG
 233         if (ldebug(brk))
 234                 kprintf(ARGS(brk, "%p"), (void *)args->dsend);
 235 #endif
 236         old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
 237         new = (vm_offset_t)args->dsend;
 238         bsd_args.sysmsg_result = 0;
 239         bsd_args.nsize = (char *) new;
 240         bsd_args.sysmsg_result = 0;
 241         if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(&bsd_args))
 242                 args->sysmsg_result = (long)new;
 243         else
 244                 args->sysmsg_result = (long)old;
 245         rel_mplock();
 246
 247         return 0;
 248 }
 249
 250 /*
 251  * MPALMOSTSAFE
 252  */
 253 int
 254 sys_linux_uselib(struct linux_uselib_args *args)
 255 {
 256         struct thread *td = curthread;
 257         struct proc *p;
 258         struct nlookupdata nd;
 259         struct vnode *vp;
 260         struct exec *a_out;
 261         struct vattr attr;
 262         vm_offset_t vmaddr;
 263         unsigned long file_offset;
 264         vm_offset_t buffer;
 265         unsigned long bss_size;
 266         int error;
 267         int locked;
 268         char *path;
 269
 270         p = td->td_proc;
 271
 272         error = linux_copyin_path(args->library, &path, LINUX_PATH_EXISTS);
 273         if (error)
 274                 return (error);
 275 #ifdef DEBUG
 276         if (ldebug(uselib))
 277                 kprintf(ARGS(uselib, "%s"), path);
 278 #endif
 279
 280         a_out = NULL;
 281         locked = 0;
 282         vp = NULL;
 283
 284         get_mplock();
 285         error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
 286         nd.nl_flags |= NLC_EXEC;
 287         if (error == 0)
 288                 error = nlookup(&nd);
 289         if (error == 0)
 290                 error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
 291         if (error)
 292                 goto cleanup;
 293         /*
 294          * From here on down, we have a locked vnode that must be unlocked.
 295          */
 296         locked = 1;
 297
 298         /* Writable? */
 299         if (vp->v_writecount) {
 300                 error = ETXTBSY;
 301                 goto cleanup;
 302         }
 303
 304         /* Executable? */
 305         error = VOP_GETATTR(vp, &attr);
 306         if (error)
 307                 goto cleanup;
 308
 309         if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
 310             ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
 311                 error = ENOEXEC;
 312                 goto cleanup;
 313         }
 314
 315         /* Sensible size? */
 316         if (attr.va_size == 0) {
 317                 error = ENOEXEC;
 318                 goto cleanup;
 319         }
 320
 321         error = VOP_OPEN(vp, FREAD, td->td_ucred, NULL);
 322         if (error)
 323                 goto cleanup;
 324
 325         /*
 326          * Lock no longer needed
 327          */
 328         vn_unlock(vp);
 329         locked = 0;
 330
 331         /* Pull in executable header into kernel_map */
 332         error = vm_mmap(&kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
 333             VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0);
 334         if (error)
 335                 goto cleanup;
 336
 337         /* Is it a Linux binary ? */
 338         if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
 339                 error = ENOEXEC;
 340                 goto cleanup;
 341         }
 342
 343         /*
 344          * While we are here, we should REALLY do some more checks
 345          */
 346
 347         /* Set file/virtual offset based on a.out variant. */
 348         switch ((int)(a_out->a_magic & 0xffff)) {
 349         case 0413:      /* ZMAGIC */
 350                 file_offset = 1024;
 351                 break;
 352         case 0314:      /* QMAGIC */
 353                 file_offset = 0;
 354                 break;
 355         default:
 356                 error = ENOEXEC;
 357                 goto cleanup;
 358         }
 359
 360         bss_size = round_page(a_out->a_bss);
 361
 362         /* Check various fields in header for validity/bounds. */
 363         if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
 364                 error = ENOEXEC;
 365                 goto cleanup;
 366         }
 367
 368         /* text + data can't exceed file size */
 369         if (a_out->a_data + a_out->a_text > attr.va_size) {
 370                 error = EFAULT;
 371                 goto cleanup;
 372         }
 373
 374         /*
 375          * text/data/bss must not exceed limits
 376          * XXX - this is not complete. it should check current usage PLUS
 377          * the resources needed by this library.
 378          */
 379         if (a_out->a_text > maxtsiz ||
 380             a_out->a_data + bss_size > p->p_rlimit[RLIMIT_DATA].rlim_cur) {
 381                 error = ENOMEM;
 382                 goto cleanup;
 383         }
 384
 385         /* prevent more writers */
 386         vsetflags(vp, VTEXT);
 387
 388         /*
 389          * Check if file_offset page aligned. Currently we cannot handle
 390          * misalinged file offsets, and so we read in the entire image
 391          * (what a waste).
 392          */
 393         if (file_offset & PAGE_MASK) {
 394 #ifdef DEBUG
 395                 kprintf("uselib: Non page aligned binary %lu\n", file_offset);
 396 #endif
 397                 /* Map text+data read/write/execute */
 398
 399                 /* a_entry is the load address and is page aligned */
 400                 vmaddr = trunc_page(a_out->a_entry);
 401
 402                 /* get anon user mapping, read+write+execute */
 403                 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0,
 404                                     &vmaddr, a_out->a_text + a_out->a_data,
 405                                     FALSE,
 406                                     VM_MAPTYPE_NORMAL,
 407                                     VM_PROT_ALL, VM_PROT_ALL,
 408                                     0);
 409                 if (error)
 410                         goto cleanup;
 411
 412                 /* map file into kernel_map */
 413                 error = vm_mmap(&kernel_map, &buffer,
 414                     round_page(a_out->a_text + a_out->a_data + file_offset),
 415                     VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp,
 416                     trunc_page(file_offset));
 417                 if (error)
 418                         goto cleanup;
 419
 420                 /* copy from kernel VM space to user space */
 421                 error = copyout((caddr_t)(uintptr_t)(buffer + file_offset),
 422                     (caddr_t)vmaddr, a_out->a_text + a_out->a_data);
 423
 424                 /* release temporary kernel space */
 425                 vm_map_remove(&kernel_map, buffer, buffer +
 426                     round_page(a_out->a_text + a_out->a_data + file_offset));
 427
 428                 if (error)
 429                         goto cleanup;
 430         } else {
 431 #ifdef DEBUG
 432                 kprintf("uselib: Page aligned binary %lu\n", file_offset);
 433 #endif
 434                 /*
 435                  * for QMAGIC, a_entry is 20 bytes beyond the load address
 436                  * to skip the executable header
 437                  */
 438                 vmaddr = trunc_page(a_out->a_entry);
 439
 440                 /*
 441                  * Map it all into the process's space as a single
 442                  * copy-on-write "data" segment.
 443                  */
 444                 error = vm_mmap(&p->p_vmspace->vm_map, &vmaddr,
 445                     a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
 446                     MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset);
 447                 if (error)
 448                         goto cleanup;
 449         }
 450 #ifdef DEBUG
 451         kprintf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0],
 452             ((long*)vmaddr)[1]);
 453 #endif
 454         if (bss_size != 0) {
 455                 /* Calculate BSS start address */
 456                 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
 457                     a_out->a_data;
 458
 459                 /* allocate some 'anon' space */
 460                 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0,
 461                                     &vmaddr, bss_size,
 462                                     FALSE,
 463                                     VM_MAPTYPE_NORMAL,
 464                                     VM_PROT_ALL, VM_PROT_ALL,
 465                                     0);
 466                 if (error)
 467                         goto cleanup;
 468         }
 469
 470 cleanup:
 471         /* Unlock/release vnode */
 472         if (vp) {
 473                 if (locked)
 474                         vn_unlock(vp);
 475                 vrele(vp);
 476         }
 477         /* Release the kernel mapping. */
 478         if (a_out) {
 479                 vm_map_remove(&kernel_map, (vm_offset_t)a_out,
 480                     (vm_offset_t)a_out + PAGE_SIZE);
 481         }
 482         nlookup_done(&nd);
 483         rel_mplock();
 484         linux_free_path(&path);
 485         return (error);
 486 }
 487
 488 /*
 489  * MPSAFE
 490  */
 491 int
 492 sys_linux_select(struct linux_select_args *args)
 493 {
 494         struct select_args bsa;
 495         struct timeval tv0, tv1, utv, *tvp;
 496         caddr_t sg;
 497         int error;
 498
 499 #ifdef DEBUG
 500         if (ldebug(select))
 501                 kprintf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
 502                     (void *)args->readfds, (void *)args->writefds,
 503                     (void *)args->exceptfds, (void *)args->timeout);
 504 #endif
 505
 506         error = 0;
 507         bsa.sysmsg_result = 0;
 508         bsa.nd = args->nfds;
 509         bsa.in = args->readfds;
 510         bsa.ou = args->writefds;
 511         bsa.ex = args->exceptfds;
 512         bsa.tv = (struct timeval *)args->timeout;
 513
 514         /*
 515          * Store current time for computation of the amount of
 516          * time left.
 517          */
 518         if (args->timeout) {
 519                 if ((error = copyin((caddr_t)args->timeout, &utv,
 520                     sizeof(utv))))
 521                         goto select_out;
 522 #ifdef DEBUG
 523                 if (ldebug(select))
 524                         kprintf(LMSG("incoming timeout (%ld/%ld)"),
 525                             utv.tv_sec, utv.tv_usec);
 526 #endif
 527
 528                 if (itimerfix(&utv)) {
 529                         /*
 530                          * The timeval was invalid.  Convert it to something
 531                          * valid that will act as it does under Linux.
 532                          */
 533                         sg = stackgap_init();
 534                         tvp = stackgap_alloc(&sg, sizeof(utv));
 535                         utv.tv_sec += utv.tv_usec / 1000000;
 536                         utv.tv_usec %= 1000000;
 537                         if (utv.tv_usec < 0) {
 538                                 utv.tv_sec -= 1;
 539                                 utv.tv_usec += 1000000;
 540                         }
 541                         if (utv.tv_sec < 0)
 542                                 timevalclear(&utv);
 543                         if ((error = copyout(&utv, tvp, sizeof(utv))))
 544                                 goto select_out;
 545                         bsa.tv = tvp;
 546                 }
 547                 microtime(&tv0);
 548         }
 549
 550         error = sys_select(&bsa);
 551         args->sysmsg_result = bsa.sysmsg_result;
 552 #ifdef DEBUG
 553         if (ldebug(select))
 554                 kprintf(LMSG("real select returns %d"), error);
 555 #endif
 556         if (error) {
 557                 /*
 558                  * See fs/select.c in the Linux kernel.  Without this,
 559                  * Maelstrom doesn't work.
 560                  */
 561                 if (error == ERESTART)
 562                         error = EINTR;
 563                 goto select_out;
 564         }
 565
 566         if (args->timeout) {
 567                 if (args->sysmsg_result) {
 568                         /*
 569                          * Compute how much time was left of the timeout,
 570                          * by subtracting the current time and the time
 571                          * before we started the call, and subtracting
 572                          * that result from the user-supplied value.
 573                          */
 574                         microtime(&tv1);
 575                         timevalsub(&tv1, &tv0);
 576                         timevalsub(&utv, &tv1);
 577                         if (utv.tv_sec < 0)
 578                                 timevalclear(&utv);
 579                 } else
 580                         timevalclear(&utv);
 581 #ifdef DEBUG
 582                 if (ldebug(select))
 583                         kprintf(LMSG("outgoing timeout (%ld/%ld)"),
 584                             utv.tv_sec, utv.tv_usec);
 585 #endif
 586                 if ((error = copyout(&utv, (caddr_t)args->timeout,
 587                     sizeof(utv))))
 588                         goto select_out;
 589         }
 590
 591 select_out:
 592 #ifdef DEBUG
 593         if (ldebug(select))
 594                 kprintf(LMSG("select_out -> %d"), error);
 595 #endif
 596         return error;
 597 }
 598
 599 /*
 600  * MPSAFE
 601  */
 602 int
 603 sys_linux_mremap(struct linux_mremap_args *args)
 604 {
 605         struct munmap_args bsd_args;
 606         int error = 0;
 607
 608 #ifdef DEBUG
 609         if (ldebug(mremap))
 610                 kprintf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
 611                     (void *)args->addr,
 612                     (unsigned long)args->old_len,
 613                     (unsigned long)args->new_len,
 614                     (unsigned long)args->flags);
 615 #endif
 616         args->new_len = round_page(args->new_len);
 617         args->old_len = round_page(args->old_len);
 618
 619         if (args->new_len > args->old_len) {
 620                 args->sysmsg_result = 0;
 621                 return ENOMEM;
 622         }
 623
 624         if (args->new_len < args->old_len) {
 625                 bsd_args.sysmsg_result = 0;
 626                 bsd_args.addr = (caddr_t)(args->addr + args->new_len);
 627                 bsd_args.len = args->old_len - args->new_len;
 628                 error = sys_munmap(&bsd_args);
 629         }
 630
 631         args->sysmsg_resultp = error ? NULL : (void *)args->addr;
 632         return error;
 633 }
 634
 635 #define LINUX_MS_ASYNC          0x0001
 636 #define LINUX_MS_INVALIDATE     0x0002
 637 #define LINUX_MS_SYNC           0x0004
 638
 639 /*
 640  * MPSAFE
 641  */
 642 int
 643 sys_linux_msync(struct linux_msync_args *args)
 644 {
 645         struct msync_args bsd_args;
 646         int error;
 647
 648         bsd_args.addr = (caddr_t)args->addr;
 649         bsd_args.len = args->len;
 650         bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
 651         bsd_args.sysmsg_result = 0;
 652
 653         error = sys_msync(&bsd_args);
 654         args->sysmsg_result = bsd_args.sysmsg_result;
 655         return(error);
 656 }
 657
 658 /*
 659  * MPSAFE
 660  */
 661 int
 662 sys_linux_time(struct linux_time_args *args)
 663 {
 664         struct timeval tv;
 665         l_time_t tm;
 666         int error;
 667
 668 #ifdef DEBUG
 669         if (ldebug(time))
 670                 kprintf(ARGS(time, "*"));
 671 #endif
 672
 673         microtime(&tv);
 674         tm = tv.tv_sec;
 675         if (args->tm && (error = copyout(&tm, (caddr_t)args->tm, sizeof(tm))))
 676                 return error;
 677         args->sysmsg_lresult = tm;
 678         return 0;
 679 }
 680
 681 struct l_times_argv {
 682         l_long          tms_utime;
 683         l_long          tms_stime;
 684         l_long          tms_cutime;
 685         l_long          tms_cstime;
 686 };
 687
 688 #define CLK_TCK 100     /* Linux uses 100 */
 689
 690 #define CONVTCK(r)      (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
 691
 692 /*
 693  * MPALMOSTSAFE
 694  */
 695 int
 696 sys_linux_times(struct linux_times_args *args)
 697 {
 698         struct thread *td = curthread;
 699         struct proc *p = td->td_proc;
 700         struct timeval tv;
 701         struct l_times_argv tms;
 702         struct rusage ru;
 703         int error;
 704
 705 #ifdef DEBUG
 706         if (ldebug(times))
 707                 kprintf(ARGS(times, "*"));
 708 #endif
 709
 710         get_mplock();
 711         calcru_proc(p, &ru);
 712         rel_mplock();
 713
 714         tms.tms_utime = CONVTCK(ru.ru_utime);
 715         tms.tms_stime = CONVTCK(ru.ru_stime);
 716
 717         tms.tms_cutime = CONVTCK(p->p_cru.ru_utime);
 718         tms.tms_cstime = CONVTCK(p->p_cru.ru_stime);
 719
 720         if ((error = copyout(&tms, (caddr_t)args->buf, sizeof(tms))))
 721                 return error;
 722
 723         microuptime(&tv);
 724         args->sysmsg_result = (int)CONVTCK(tv);
 725         return 0;
 726 }
 727
 728 /*
 729  * MPALMOSTSAFE
 730  */
 731 int
 732 sys_linux_newuname(struct linux_newuname_args *args)
 733 {
 734         struct thread *td = curthread;
 735         struct l_new_utsname utsname;
 736         char *osrelease, *osname;
 737
 738 #ifdef DEBUG
 739         if (ldebug(newuname))
 740                 kprintf(ARGS(newuname, "*"));
 741 #endif
 742
 743         get_mplock();
 744         osname = linux_get_osname(td);
 745         osrelease = linux_get_osrelease(td);
 746
 747         bzero(&utsname, sizeof(utsname));
 748         strncpy(utsname.sysname, osname, LINUX_MAX_UTSNAME-1);
 749         strncpy(utsname.nodename, hostname, LINUX_MAX_UTSNAME-1);
 750         strncpy(utsname.release, osrelease, LINUX_MAX_UTSNAME-1);
 751         strncpy(utsname.version, version, LINUX_MAX_UTSNAME-1);
 752         strncpy(utsname.machine, machine, LINUX_MAX_UTSNAME-1);
 753         strncpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME-1);
 754         rel_mplock();
 755
 756         return (copyout(&utsname, (caddr_t)args->buf, sizeof(utsname)));
 757 }
 758
 759 #if defined(__i386__)
 760 struct l_utimbuf {
 761         l_time_t l_actime;
 762         l_time_t l_modtime;
 763 };
 764
 765 /*
 766  * MPALMOSTSAFE
 767  */
 768 int
 769 sys_linux_utime(struct linux_utime_args *args)
 770 {
 771         struct timeval tv[2];
 772         struct l_utimbuf lut;
 773         struct nlookupdata nd;
 774         char *path;
 775         int error;
 776
 777         error = linux_copyin_path(args->fname, &path, LINUX_PATH_EXISTS);
 778         if (error)
 779                 return (error);
 780 #ifdef DEBUG
 781         if (ldebug(utime))
 782                 kprintf(ARGS(utime, "%s, *"), path);
 783 #endif
 784
 785         if (args->times) {
 786                 error = copyin(args->times, &lut, sizeof(lut));
 787                 if (error)
 788                         goto cleanup;
 789                 tv[0].tv_sec = lut.l_actime;
 790                 tv[0].tv_usec = 0;
 791                 tv[1].tv_sec = lut.l_modtime;
 792                 tv[1].tv_usec = 0;
 793         }
 794         get_mplock();
 795         error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
 796         if (error == 0)
 797                 error = kern_utimes(&nd, args->times ? tv : NULL);
 798         nlookup_done(&nd);
 799         rel_mplock();
 800 cleanup:
 801         linux_free_path(&path);
 802         return (error);
 803 }
 804 #endif /* __i386__ */
 805
 806 #define __WCLONE 0x80000000
 807
 808 /*
 809  * MPALMOSTSAFE
 810  */
 811 int
 812 sys_linux_waitpid(struct linux_waitpid_args *args)
 813 {
 814         int error, options, status;
 815
 816 #ifdef DEBUG
 817         if (ldebug(waitpid))
 818                 kprintf(ARGS(waitpid, "%d, %p, %d"),
 819                     args->pid, (void *)args->status, args->options);
 820 #endif
 821         options = args->options & (WNOHANG | WUNTRACED);
 822         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
 823         if (args->options & __WCLONE)
 824                 options |= WLINUXCLONE;
 825
 826         error = kern_wait(args->pid, args->status ? &status : NULL, options,
 827                           NULL, &args->sysmsg_result);
 828
 829         if (error == 0 && args->status) {
 830                 status &= 0xffff;
 831                 if (WIFSIGNALED(status))
 832                         status = (status & 0xffffff80) |
 833                             BSD_TO_LINUX_SIGNAL(WTERMSIG(status));
 834                 else if (WIFSTOPPED(status))
 835                         status = (status & 0xffff00ff) |
 836                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(status)) << 8);
 837                 error = copyout(&status, args->status, sizeof(status));
 838         }
 839
 840         return (error);
 841 }
 842
 843 /*
 844  * MPALMOSTSAFE
 845  */
 846 int
 847 sys_linux_wait4(struct linux_wait4_args *args)
 848 {
 849         struct thread *td = curthread;
 850         struct lwp *lp = td->td_lwp;
 851         struct rusage rusage;
 852         int error, options, status;
 853
 854 #ifdef DEBUG
 855         if (ldebug(wait4))
 856                 kprintf(ARGS(wait4, "%d, %p, %d, %p"),
 857                     args->pid, (void *)args->status, args->options,
 858                     (void *)args->rusage);
 859 #endif
 860         options = args->options & (WNOHANG | WUNTRACED);
 861         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
 862         if (args->options & __WCLONE)
 863                 options |= WLINUXCLONE;
 864
 865         error = kern_wait(args->pid, args->status ? &status : NULL, options,
 866                           args->rusage ? &rusage : NULL, &args->sysmsg_result);
 867
 868         if (error == 0)
 869                 lwp_delsig(lp, SIGCHLD);
 870
 871         if (error == 0 && args->status) {
 872                 status &= 0xffff;
 873                 if (WIFSIGNALED(status))
 874                         status = (status & 0xffffff80) |
 875                             BSD_TO_LINUX_SIGNAL(WTERMSIG(status));
 876                 else if (WIFSTOPPED(status))
 877                         status = (status & 0xffff00ff) |
 878                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(status)) << 8);
 879                 error = copyout(&status, args->status, sizeof(status));
 880         }
 881         if (error == 0 && args->rusage)
 882                 error = copyout(&rusage, args->rusage, sizeof(rusage));
 883
 884         return (error);
 885 }
 886
 887 /*
 888  * MPALMOSTSAFE
 889  */
 890 int
 891 sys_linux_mknod(struct linux_mknod_args *args)
 892 {
 893         struct nlookupdata nd;
 894         char *path;
 895         int error;
 896
 897         error = linux_copyin_path(args->path, &path, LINUX_PATH_CREATE);
 898         if (error)
 899                 return (error);
 900 #ifdef DEBUG
 901         if (ldebug(mknod))
 902                 kprintf(ARGS(mknod, "%s, %d, %d"),
 903                     path, args->mode, args->dev);
 904 #endif
 905         get_mplock();
 906         error = nlookup_init(&nd, path, UIO_SYSSPACE, 0);
 907         if (error == 0) {
 908                 if (args->mode & S_IFIFO) {
 909                         error = kern_mkfifo(&nd, args->mode);
 910                 } else {
 911                         error = kern_mknod(&nd, args->mode,
 912                                            umajor(args->dev),
 913                                            uminor(args->dev));
 914                 }
 915         }
 916         nlookup_done(&nd);
 917         rel_mplock();
 918
 919         linux_free_path(&path);
 920         return(error);
 921 }
 922
 923 /*
 924  * UGH! This is just about the dumbest idea I've ever heard!!
 925  *
 926  * MPSAFE
 927  */
 928 int
 929 sys_linux_personality(struct linux_personality_args *args)
 930 {
 931 #ifdef DEBUG
 932         if (ldebug(personality))
 933                 kprintf(ARGS(personality, "%d"), args->per);
 934 #endif
 935         if (args->per != 0)
 936                 return EINVAL;
 937
 938         /* Yes Jim, it's still a Linux... */
 939         args->sysmsg_result = 0;
 940         return 0;
 941 }
 942
 943 /*
 944  * Wrappers for get/setitimer for debugging..
 945  *
 946  * MPSAFE
 947  */
 948 int
 949 sys_linux_setitimer(struct linux_setitimer_args *args)
 950 {
 951         struct setitimer_args bsa;
 952         struct itimerval foo;
 953         int error;
 954
 955 #ifdef DEBUG
 956         if (ldebug(setitimer))
 957                 kprintf(ARGS(setitimer, "%p, %p"),
 958                     (void *)args->itv, (void *)args->oitv);
 959 #endif
 960         bsa.which = args->which;
 961         bsa.itv = (struct itimerval *)args->itv;
 962         bsa.oitv = (struct itimerval *)args->oitv;
 963         bsa.sysmsg_result = 0;
 964         if (args->itv) {
 965             if ((error = copyin((caddr_t)args->itv, &foo, sizeof(foo))))
 966                 return error;
 967 #ifdef DEBUG
 968             if (ldebug(setitimer)) {
 969                 kprintf("setitimer: value: sec: %ld, usec: %ld\n",
 970                     foo.it_value.tv_sec, foo.it_value.tv_usec);
 971                 kprintf("setitimer: interval: sec: %ld, usec: %ld\n",
 972                     foo.it_interval.tv_sec, foo.it_interval.tv_usec);
 973             }
 974 #endif
 975         }
 976         error = sys_setitimer(&bsa);
 977         args->sysmsg_result = bsa.sysmsg_result;
 978         return(error);
 979 }
 980
 981 /*
 982  * MPSAFE
 983  */
 984 int
 985 sys_linux_getitimer(struct linux_getitimer_args *args)
 986 {
 987         struct getitimer_args bsa;
 988         int error;
 989 #ifdef DEBUG
 990         if (ldebug(getitimer))
 991                 kprintf(ARGS(getitimer, "%p"), (void *)args->itv);
 992 #endif
 993         bsa.which = args->which;
 994         bsa.itv = (struct itimerval *)args->itv;
 995         bsa.sysmsg_result = 0;
 996         error = sys_getitimer(&bsa);
 997         args->sysmsg_result = bsa.sysmsg_result;
 998         return(error);
 999 }
1000
1001 /*
1002  * MPSAFE
1003  */
1004 int
1005 sys_linux_nice(struct linux_nice_args *args)
1006 {
1007         struct setpriority_args bsd_args;
1008         int error;
1009
1010         bsd_args.which = PRIO_PROCESS;
1011         bsd_args.who = 0;       /* current process */
1012         bsd_args.prio = args->inc;
1013         bsd_args.sysmsg_result = 0;
1014         error = sys_setpriority(&bsd_args);
1015         args->sysmsg_result = bsd_args.sysmsg_result;
1016         return(error);
1017 }
1018
1019 /*
1020  * MPALMOSTSAFE
1021  */
1022 int
1023 sys_linux_setgroups(struct linux_setgroups_args *args)
1024 {
1025         struct thread *td = curthread;
1026         struct proc *p = td->td_proc;
1027         struct ucred *newcred, *oldcred;
1028         l_gid_t linux_gidset[NGROUPS];
1029         gid_t *bsd_gidset;
1030         int ngrp, error;
1031
1032         ngrp = args->gidsetsize;
1033         oldcred = td->td_ucred;
1034
1035         /*
1036          * cr_groups[0] holds egid. Setting the whole set from
1037          * the supplied set will cause egid to be changed too.
1038          * Keep cr_groups[0] unchanged to prevent that.
1039          */
1040
1041         if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0)
1042                 return (error);
1043
1044         if ((u_int)ngrp >= NGROUPS)
1045                 return (EINVAL);
1046
1047         get_mplock();
1048         newcred = crdup(oldcred);
1049         if (ngrp > 0) {
1050                 error = copyin((caddr_t)args->grouplist, linux_gidset,
1051                                ngrp * sizeof(l_gid_t));
1052                 if (error) {
1053                         crfree(newcred);
1054                         rel_mplock();
1055                         return (error);
1056                 }
1057
1058                 newcred->cr_ngroups = ngrp + 1;
1059
1060                 bsd_gidset = newcred->cr_groups;
1061                 ngrp--;
1062                 while (ngrp >= 0) {
1063                         bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
1064                         ngrp--;
1065                 }
1066         } else {
1067                 newcred->cr_ngroups = 1;
1068         }
1069
1070         setsugid();
1071         oldcred = p->p_ucred;   /* reload, deal with threads race */
1072         p->p_ucred = newcred;
1073         crfree(oldcred);
1074         rel_mplock();
1075         return (0);
1076 }
1077
1078 /*
1079  * MPSAFE
1080  */
1081 int
1082 sys_linux_getgroups(struct linux_getgroups_args *args)
1083 {
1084         struct thread *td = curthread;
1085         struct ucred *cred;
1086         l_gid_t linux_gidset[NGROUPS];
1087         gid_t *bsd_gidset;
1088         int bsd_gidsetsz, ngrp, error;
1089
1090         cred = td->td_ucred;
1091         bsd_gidset = cred->cr_groups;
1092         bsd_gidsetsz = cred->cr_ngroups - 1;
1093
1094         /*
1095          * cr_groups[0] holds egid. Returning the whole set
1096          * here will cause a duplicate. Exclude cr_groups[0]
1097          * to prevent that.
1098          */
1099
1100         if ((ngrp = args->gidsetsize) == 0) {
1101                 args->sysmsg_result = bsd_gidsetsz;
1102                 return (0);
1103         }
1104
1105         if ((u_int)ngrp < bsd_gidsetsz)
1106                 return (EINVAL);
1107
1108         ngrp = 0;
1109         while (ngrp < bsd_gidsetsz) {
1110                 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
1111                 ngrp++;
1112         }
1113
1114         if ((error = copyout(linux_gidset, args->grouplist,
1115                              ngrp * sizeof(l_gid_t)))) {
1116                 return (error);
1117         }
1118
1119         args->sysmsg_result = ngrp;
1120         return (0);
1121 }
1122
1123 /*
1124  * MPSAFE
1125  */
1126 int
1127 sys_linux_setrlimit(struct linux_setrlimit_args *args)
1128 {
1129         struct l_rlimit linux_rlim;
1130         struct rlimit rlim;
1131         u_int which;
1132         int error;
1133
1134 #ifdef DEBUG
1135         if (ldebug(setrlimit))
1136                 kprintf(ARGS(setrlimit, "%d, %p"),
1137                     args->resource, (void *)args->rlim);
1138 #endif
1139         if (args->resource >= LINUX_RLIM_NLIMITS)
1140                 return (EINVAL);
1141         which = linux_to_bsd_resource[args->resource];
1142         if (which == -1)
1143                 return (EINVAL);
1144
1145         error = copyin(args->rlim, &linux_rlim, sizeof(linux_rlim));
1146         if (error)
1147                 return (error);
1148         rlim.rlim_cur = (rlim_t)linux_rlim.rlim_cur;
1149         rlim.rlim_max = (rlim_t)linux_rlim.rlim_max;
1150
1151         error = kern_setrlimit(which, &rlim);
1152
1153         return(error);
1154 }
1155
1156 /*
1157  * MPSAFE
1158  */
1159 int
1160 sys_linux_old_getrlimit(struct linux_old_getrlimit_args *args)
1161 {
1162         struct l_rlimit linux_rlim;
1163         struct rlimit rlim;
1164         u_int which;
1165         int error;
1166
1167 #ifdef DEBUG
1168         if (ldebug(old_getrlimit))
1169                 kprintf(ARGS(old_getrlimit, "%d, %p"),
1170                     args->resource, (void *)args->rlim);
1171 #endif
1172         if (args->resource >= LINUX_RLIM_NLIMITS)
1173                 return (EINVAL);
1174         which = linux_to_bsd_resource[args->resource];
1175         if (which == -1)
1176                 return (EINVAL);
1177
1178         error = kern_getrlimit(which, &rlim);
1179
1180         if (error == 0) {
1181                 linux_rlim.rlim_cur = (l_ulong)rlim.rlim_cur;
1182                 if (linux_rlim.rlim_cur == ULONG_MAX)
1183                         linux_rlim.rlim_cur = LONG_MAX;
1184                 linux_rlim.rlim_max = (l_ulong)rlim.rlim_max;
1185                 if (linux_rlim.rlim_max == ULONG_MAX)
1186                         linux_rlim.rlim_max = LONG_MAX;
1187                 error = copyout(&linux_rlim, args->rlim, sizeof(linux_rlim));
1188         }
1189         return (error);
1190 }
1191
1192 /*
1193  * MPSAFE
1194  */
1195 int
1196 sys_linux_getrlimit(struct linux_getrlimit_args *args)
1197 {
1198         struct l_rlimit linux_rlim;
1199         struct rlimit rlim;
1200         u_int which;
1201         int error;
1202
1203 #ifdef DEBUG
1204         if (ldebug(getrlimit))
1205                 kprintf(ARGS(getrlimit, "%d, %p"),
1206                     args->resource, (void *)args->rlim);
1207 #endif
1208         if (args->resource >= LINUX_RLIM_NLIMITS)
1209                 return (EINVAL);
1210         which = linux_to_bsd_resource[args->resource];
1211         if (which == -1)
1212                 return (EINVAL);
1213
1214         error = kern_getrlimit(which, &rlim);
1215
1216         if (error == 0) {
1217                 linux_rlim.rlim_cur = (l_ulong)rlim.rlim_cur;
1218                 linux_rlim.rlim_max = (l_ulong)rlim.rlim_max;
1219                 error = copyout(&linux_rlim, args->rlim, sizeof(linux_rlim));
1220         }
1221         return (error);
1222 }
1223
1224 /*
1225  * MPSAFE
1226  */
1227 int
1228 sys_linux_sched_setscheduler(struct linux_sched_setscheduler_args *args)
1229 {
1230         struct sched_setscheduler_args bsd;
1231         int error;
1232
1233 #ifdef DEBUG
1234         if (ldebug(sched_setscheduler))
1235                 kprintf(ARGS(sched_setscheduler, "%d, %d, %p"),
1236                     args->pid, args->policy, (const void *)args->param);
1237 #endif
1238
1239         switch (args->policy) {
1240         case LINUX_SCHED_OTHER:
1241                 bsd.policy = SCHED_OTHER;
1242                 break;
1243         case LINUX_SCHED_FIFO:
1244                 bsd.policy = SCHED_FIFO;
1245                 break;
1246         case LINUX_SCHED_RR:
1247                 bsd.policy = SCHED_RR;
1248                 break;
1249         default:
1250                 return EINVAL;
1251         }
1252
1253         bsd.pid = args->pid;
1254         bsd.param = (struct sched_param *)args->param;
1255         bsd.sysmsg_result = 0;
1256
1257         error = sys_sched_setscheduler(&bsd);
1258         args->sysmsg_result = bsd.sysmsg_result;
1259         return(error);
1260 }
1261
1262 /*
1263  * MPSAFE
1264  */
1265 int
1266 sys_linux_sched_getscheduler(struct linux_sched_getscheduler_args *args)
1267 {
1268         struct sched_getscheduler_args bsd;
1269         int error;
1270
1271 #ifdef DEBUG
1272         if (ldebug(sched_getscheduler))
1273                 kprintf(ARGS(sched_getscheduler, "%d"), args->pid);
1274 #endif
1275
1276         bsd.sysmsg_result = 0;
1277         bsd.pid = args->pid;
1278         error = sys_sched_getscheduler(&bsd);
1279         args->sysmsg_result = bsd.sysmsg_result;
1280
1281         switch (args->sysmsg_result) {
1282         case SCHED_OTHER:
1283                 args->sysmsg_result = LINUX_SCHED_OTHER;
1284                 break;
1285         case SCHED_FIFO:
1286                 args->sysmsg_result = LINUX_SCHED_FIFO;
1287                 break;
1288         case SCHED_RR:
1289                 args->sysmsg_result = LINUX_SCHED_RR;
1290                 break;
1291         }
1292         return error;
1293 }
1294
1295 /*
1296  * MPSAFE
1297  */
1298 int
1299 sys_linux_sched_get_priority_max(struct linux_sched_get_priority_max_args *args)
1300 {
1301         struct sched_get_priority_max_args bsd;
1302         int error;
1303
1304 #ifdef DEBUG
1305         if (ldebug(sched_get_priority_max))
1306                 kprintf(ARGS(sched_get_priority_max, "%d"), args->policy);
1307 #endif
1308
1309         switch (args->policy) {
1310         case LINUX_SCHED_OTHER:
1311                 bsd.policy = SCHED_OTHER;
1312                 break;
1313         case LINUX_SCHED_FIFO:
1314                 bsd.policy = SCHED_FIFO;
1315                 break;
1316         case LINUX_SCHED_RR:
1317                 bsd.policy = SCHED_RR;
1318                 break;
1319         default:
1320                 return EINVAL;
1321         }
1322         bsd.sysmsg_result = 0;
1323
1324         error = sys_sched_get_priority_max(&bsd);
1325         args->sysmsg_result = bsd.sysmsg_result;
1326         return(error);
1327 }
1328
1329 /*
1330  * MPSAFE
1331  */
1332 int
1333 sys_linux_sched_get_priority_min(struct linux_sched_get_priority_min_args *args)
1334 {
1335         struct sched_get_priority_min_args bsd;
1336         int error;
1337
1338 #ifdef DEBUG
1339         if (ldebug(sched_get_priority_min))
1340                 kprintf(ARGS(sched_get_priority_min, "%d"), args->policy);
1341 #endif
1342
1343         switch (args->policy) {
1344         case LINUX_SCHED_OTHER:
1345                 bsd.policy = SCHED_OTHER;
1346                 break;
1347         case LINUX_SCHED_FIFO:
1348                 bsd.policy = SCHED_FIFO;
1349                 break;
1350         case LINUX_SCHED_RR:
1351                 bsd.policy = SCHED_RR;
1352                 break;
1353         default:
1354                 return EINVAL;
1355         }
1356         bsd.sysmsg_result = 0;
1357
1358         error = sys_sched_get_priority_min(&bsd);
1359         args->sysmsg_result = bsd.sysmsg_result;
1360         return(error);
1361 }
1362
1363 #define REBOOT_CAD_ON   0x89abcdef
1364 #define REBOOT_CAD_OFF  0
1365 #define REBOOT_HALT     0xcdef0123
1366
1367 /*
1368  * MPSAFE
1369  */
1370 int
1371 sys_linux_reboot(struct linux_reboot_args *args)
1372 {
1373         struct reboot_args bsd_args;
1374         int error;
1375
1376 #ifdef DEBUG
1377         if (ldebug(reboot))
1378                 kprintf(ARGS(reboot, "0x%x"), args->cmd);
1379 #endif
1380         if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF)
1381                 return (0);
1382         bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0;
1383         bsd_args.sysmsg_result = 0;
1384
1385         error = sys_reboot(&bsd_args);
1386         args->sysmsg_result = bsd_args.sysmsg_result;
1387         return(error);
1388 }
1389
1390 /*
1391  * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
1392  * p->p_retval[1] when COMPAT_43 or COMPAT_SUNOS is defined. This
1393  * globbers registers that are assumed to be preserved. The following
1394  * lightweight syscalls fixes this. See also linux_getgid16() and
1395  * linux_getuid16() in linux_uid16.c.
1396  *
1397  * linux_getpid() - MP SAFE
1398  * linux_getgid() - MP SAFE
1399  * linux_getuid() - MP SAFE
1400  */
1401
1402 /*
1403  * MPSAFE
1404  */
1405 int
1406 sys_linux_getpid(struct linux_getpid_args *args)
1407 {
1408         struct thread *td = curthread;
1409         struct proc *p = td->td_proc;
1410
1411         args->sysmsg_result = p->p_pid;
1412         return (0);
1413 }
1414
1415 /*
1416  * MPSAFE
1417  */
1418 int
1419 sys_linux_getgid(struct linux_getgid_args *args)
1420 {
1421         struct thread *td = curthread;
1422
1423         args->sysmsg_result = td->td_ucred->cr_rgid;
1424         return (0);
1425 }
1426
1427 /*
1428  * MPSAFE
1429  */
1430 int
1431 sys_linux_getuid(struct linux_getuid_args *args)
1432 {
1433         struct thread *td = curthread;
1434
1435         args->sysmsg_result = td->td_ucred->cr_ruid;
1436         return (0);
1437 }
1438
1439 /*
1440  * MPSAFE
1441  */
1442 int
1443 sys_linux_getsid(struct linux_getsid_args *args)
1444 {
1445         struct getsid_args bsd;
1446         int error;
1447
1448         bsd.sysmsg_result = 0;
1449         bsd.pid = args->pid;
1450         error = sys_getsid(&bsd);
1451         args->sysmsg_result = bsd.sysmsg_result;
1452         return(error);
1453 }
1454
1455 /*
1456  * MPSAFE
1457  */
1458 int
1459 linux_nosys(struct nosys_args *args)
1460 {
1461         /* XXX */
1462         return (ENOSYS);
1463 }