The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_misc.c

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    1 /*-
    2  * Copyright (c) 2002 Doug Rabson
    3  * Copyright (c) 1994-1995 Sųren Schmidt
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer
   11  *    in this position and unchanged.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/9.2/sys/compat/linux/linux_misc.c 246290 2013-02-03 18:14:37Z dchagin $");
   32 
   33 #include "opt_compat.h"
   34 #include "opt_kdtrace.h"
   35 
   36 #include <sys/param.h>
   37 #include <sys/blist.h>
   38 #include <sys/fcntl.h>
   39 #if defined(__i386__)
   40 #include <sys/imgact_aout.h>
   41 #endif
   42 #include <sys/jail.h>
   43 #include <sys/kernel.h>
   44 #include <sys/limits.h>
   45 #include <sys/lock.h>
   46 #include <sys/malloc.h>
   47 #include <sys/mman.h>
   48 #include <sys/mount.h>
   49 #include <sys/mutex.h>
   50 #include <sys/namei.h>
   51 #include <sys/priv.h>
   52 #include <sys/proc.h>
   53 #include <sys/reboot.h>
   54 #include <sys/racct.h>
   55 #include <sys/resourcevar.h>
   56 #include <sys/sched.h>
   57 #include <sys/sdt.h>
   58 #include <sys/signalvar.h>
   59 #include <sys/stat.h>
   60 #include <sys/syscallsubr.h>
   61 #include <sys/sysctl.h>
   62 #include <sys/sysproto.h>
   63 #include <sys/systm.h>
   64 #include <sys/time.h>
   65 #include <sys/vmmeter.h>
   66 #include <sys/vnode.h>
   67 #include <sys/wait.h>
   68 #include <sys/cpuset.h>
   69 
   70 #include <security/mac/mac_framework.h>
   71 
   72 #include <vm/vm.h>
   73 #include <vm/pmap.h>
   74 #include <vm/vm_kern.h>
   75 #include <vm/vm_map.h>
   76 #include <vm/vm_extern.h>
   77 #include <vm/vm_object.h>
   78 #include <vm/swap_pager.h>
   79 
   80 #ifdef COMPAT_LINUX32
   81 #include <machine/../linux32/linux.h>
   82 #include <machine/../linux32/linux32_proto.h>
   83 #else
   84 #include <machine/../linux/linux.h>
   85 #include <machine/../linux/linux_proto.h>
   86 #endif
   87 
   88 #include <compat/linux/linux_dtrace.h>
   89 #include <compat/linux/linux_file.h>
   90 #include <compat/linux/linux_mib.h>
   91 #include <compat/linux/linux_signal.h>
   92 #include <compat/linux/linux_util.h>
   93 #include <compat/linux/linux_sysproto.h>
   94 #include <compat/linux/linux_emul.h>
   95 #include <compat/linux/linux_misc.h>
   96 
   97 /* DTrace init */
   98 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
   99 
  100 /* Linuxulator-global DTrace probes */
  101 LIN_SDT_PROBE_DECLARE(locks, emul_lock, locked);
  102 LIN_SDT_PROBE_DECLARE(locks, emul_lock, unlock);
  103 LIN_SDT_PROBE_DECLARE(locks, emul_shared_rlock, locked);
  104 LIN_SDT_PROBE_DECLARE(locks, emul_shared_rlock, unlock);
  105 LIN_SDT_PROBE_DECLARE(locks, emul_shared_wlock, locked);
  106 LIN_SDT_PROBE_DECLARE(locks, emul_shared_wlock, unlock);
  107 
  108 int stclohz;                            /* Statistics clock frequency */
  109 
  110 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
  111         RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
  112         RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
  113         RLIMIT_MEMLOCK, RLIMIT_AS 
  114 };
  115 
  116 struct l_sysinfo {
  117         l_long          uptime;         /* Seconds since boot */
  118         l_ulong         loads[3];       /* 1, 5, and 15 minute load averages */
  119 #define LINUX_SYSINFO_LOADS_SCALE 65536
  120         l_ulong         totalram;       /* Total usable main memory size */
  121         l_ulong         freeram;        /* Available memory size */
  122         l_ulong         sharedram;      /* Amount of shared memory */
  123         l_ulong         bufferram;      /* Memory used by buffers */
  124         l_ulong         totalswap;      /* Total swap space size */
  125         l_ulong         freeswap;       /* swap space still available */
  126         l_ushort        procs;          /* Number of current processes */
  127         l_ushort        pads;
  128         l_ulong         totalbig;
  129         l_ulong         freebig;
  130         l_uint          mem_unit;
  131         char            _f[20-2*sizeof(l_long)-sizeof(l_int)];  /* padding */
  132 };
  133 int
  134 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args)
  135 {
  136         struct l_sysinfo sysinfo;
  137         vm_object_t object;
  138         int i, j;
  139         struct timespec ts;
  140 
  141         getnanouptime(&ts);
  142         if (ts.tv_nsec != 0)
  143                 ts.tv_sec++;
  144         sysinfo.uptime = ts.tv_sec;
  145 
  146         /* Use the information from the mib to get our load averages */
  147         for (i = 0; i < 3; i++)
  148                 sysinfo.loads[i] = averunnable.ldavg[i] *
  149                     LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
  150 
  151         sysinfo.totalram = physmem * PAGE_SIZE;
  152         sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE;
  153 
  154         sysinfo.sharedram = 0;
  155         mtx_lock(&vm_object_list_mtx);
  156         TAILQ_FOREACH(object, &vm_object_list, object_list)
  157                 if (object->shadow_count > 1)
  158                         sysinfo.sharedram += object->resident_page_count;
  159         mtx_unlock(&vm_object_list_mtx);
  160 
  161         sysinfo.sharedram *= PAGE_SIZE;
  162         sysinfo.bufferram = 0;
  163 
  164         swap_pager_status(&i, &j);
  165         sysinfo.totalswap = i * PAGE_SIZE;
  166         sysinfo.freeswap = (i - j) * PAGE_SIZE;
  167 
  168         sysinfo.procs = nprocs;
  169 
  170         /* The following are only present in newer Linux kernels. */
  171         sysinfo.totalbig = 0;
  172         sysinfo.freebig = 0;
  173         sysinfo.mem_unit = 1;
  174 
  175         return (copyout(&sysinfo, args->info, sizeof(sysinfo)));
  176 }
  177 
  178 int
  179 linux_alarm(struct thread *td, struct linux_alarm_args *args)
  180 {
  181         struct itimerval it, old_it;
  182         u_int secs;
  183         int error;
  184 
  185 #ifdef DEBUG
  186         if (ldebug(alarm))
  187                 printf(ARGS(alarm, "%u"), args->secs);
  188 #endif
  189         
  190         secs = args->secs;
  191 
  192         if (secs > INT_MAX)
  193                 secs = INT_MAX;
  194 
  195         it.it_value.tv_sec = (long) secs;
  196         it.it_value.tv_usec = 0;
  197         it.it_interval.tv_sec = 0;
  198         it.it_interval.tv_usec = 0;
  199         error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
  200         if (error)
  201                 return (error);
  202         if (timevalisset(&old_it.it_value)) {
  203                 if (old_it.it_value.tv_usec != 0)
  204                         old_it.it_value.tv_sec++;
  205                 td->td_retval[0] = old_it.it_value.tv_sec;
  206         }
  207         return (0);
  208 }
  209 
  210 int
  211 linux_brk(struct thread *td, struct linux_brk_args *args)
  212 {
  213         struct vmspace *vm = td->td_proc->p_vmspace;
  214         vm_offset_t new, old;
  215         struct obreak_args /* {
  216                 char * nsize;
  217         } */ tmp;
  218 
  219 #ifdef DEBUG
  220         if (ldebug(brk))
  221                 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
  222 #endif
  223         old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
  224         new = (vm_offset_t)args->dsend;
  225         tmp.nsize = (char *)new;
  226         if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp))
  227                 td->td_retval[0] = (long)new;
  228         else
  229                 td->td_retval[0] = (long)old;
  230 
  231         return (0);
  232 }
  233 
  234 #if defined(__i386__)
  235 /* XXX: what about amd64/linux32? */
  236 
  237 int
  238 linux_uselib(struct thread *td, struct linux_uselib_args *args)
  239 {
  240         struct nameidata ni;
  241         struct vnode *vp;
  242         struct exec *a_out;
  243         struct vattr attr;
  244         vm_offset_t vmaddr;
  245         unsigned long file_offset;
  246         unsigned long bss_size;
  247         char *library;
  248         ssize_t aresid;
  249         int error, locked, vfslocked, writecount;
  250 
  251         LCONVPATHEXIST(td, args->library, &library);
  252 
  253 #ifdef DEBUG
  254         if (ldebug(uselib))
  255                 printf(ARGS(uselib, "%s"), library);
  256 #endif
  257 
  258         a_out = NULL;
  259         vfslocked = 0;
  260         locked = 0;
  261         vp = NULL;
  262 
  263         NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
  264             UIO_SYSSPACE, library, td);
  265         error = namei(&ni);
  266         LFREEPATH(library);
  267         if (error)
  268                 goto cleanup;
  269 
  270         vp = ni.ni_vp;
  271         vfslocked = NDHASGIANT(&ni);
  272         NDFREE(&ni, NDF_ONLY_PNBUF);
  273 
  274         /*
  275          * From here on down, we have a locked vnode that must be unlocked.
  276          * XXX: The code below largely duplicates exec_check_permissions().
  277          */
  278         locked = 1;
  279 
  280         /* Writable? */
  281         error = VOP_GET_WRITECOUNT(vp, &writecount);
  282         if (error != 0)
  283                 goto cleanup;
  284         if (writecount != 0) {
  285                 error = ETXTBSY;
  286                 goto cleanup;
  287         }
  288 
  289         /* Executable? */
  290         error = VOP_GETATTR(vp, &attr, td->td_ucred);
  291         if (error)
  292                 goto cleanup;
  293 
  294         if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
  295             ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
  296                 /* EACCESS is what exec(2) returns. */
  297                 error = ENOEXEC;
  298                 goto cleanup;
  299         }
  300 
  301         /* Sensible size? */
  302         if (attr.va_size == 0) {
  303                 error = ENOEXEC;
  304                 goto cleanup;
  305         }
  306 
  307         /* Can we access it? */
  308         error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
  309         if (error)
  310                 goto cleanup;
  311 
  312         /*
  313          * XXX: This should use vn_open() so that it is properly authorized,
  314          * and to reduce code redundancy all over the place here.
  315          * XXX: Not really, it duplicates far more of exec_check_permissions()
  316          * than vn_open().
  317          */
  318 #ifdef MAC
  319         error = mac_vnode_check_open(td->td_ucred, vp, VREAD);
  320         if (error)
  321                 goto cleanup;
  322 #endif
  323         error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL);
  324         if (error)
  325                 goto cleanup;
  326 
  327         /* Pull in executable header into exec_map */
  328         error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE,
  329             VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
  330         if (error)
  331                 goto cleanup;
  332 
  333         /* Is it a Linux binary ? */
  334         if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
  335                 error = ENOEXEC;
  336                 goto cleanup;
  337         }
  338 
  339         /*
  340          * While we are here, we should REALLY do some more checks
  341          */
  342 
  343         /* Set file/virtual offset based on a.out variant. */
  344         switch ((int)(a_out->a_magic & 0xffff)) {
  345         case 0413:                      /* ZMAGIC */
  346                 file_offset = 1024;
  347                 break;
  348         case 0314:                      /* QMAGIC */
  349                 file_offset = 0;
  350                 break;
  351         default:
  352                 error = ENOEXEC;
  353                 goto cleanup;
  354         }
  355 
  356         bss_size = round_page(a_out->a_bss);
  357 
  358         /* Check various fields in header for validity/bounds. */
  359         if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
  360                 error = ENOEXEC;
  361                 goto cleanup;
  362         }
  363 
  364         /* text + data can't exceed file size */
  365         if (a_out->a_data + a_out->a_text > attr.va_size) {
  366                 error = EFAULT;
  367                 goto cleanup;
  368         }
  369 
  370         /*
  371          * text/data/bss must not exceed limits
  372          * XXX - this is not complete. it should check current usage PLUS
  373          * the resources needed by this library.
  374          */
  375         PROC_LOCK(td->td_proc);
  376         if (a_out->a_text > maxtsiz ||
  377             a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA) ||
  378             racct_set(td->td_proc, RACCT_DATA, a_out->a_data +
  379             bss_size) != 0) {
  380                 PROC_UNLOCK(td->td_proc);
  381                 error = ENOMEM;
  382                 goto cleanup;
  383         }
  384         PROC_UNLOCK(td->td_proc);
  385 
  386         /*
  387          * Prevent more writers.
  388          * XXX: Note that if any of the VM operations fail below we don't
  389          * clear this flag.
  390          */
  391         VOP_SET_TEXT(vp);
  392 
  393         /*
  394          * Lock no longer needed
  395          */
  396         locked = 0;
  397         VOP_UNLOCK(vp, 0);
  398         VFS_UNLOCK_GIANT(vfslocked);
  399 
  400         /*
  401          * Check if file_offset page aligned. Currently we cannot handle
  402          * misalinged file offsets, and so we read in the entire image
  403          * (what a waste).
  404          */
  405         if (file_offset & PAGE_MASK) {
  406 #ifdef DEBUG
  407                 printf("uselib: Non page aligned binary %lu\n", file_offset);
  408 #endif
  409                 /* Map text+data read/write/execute */
  410 
  411                 /* a_entry is the load address and is page aligned */
  412                 vmaddr = trunc_page(a_out->a_entry);
  413 
  414                 /* get anon user mapping, read+write+execute */
  415                 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
  416                     &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL,
  417                     VM_PROT_ALL, 0);
  418                 if (error)
  419                         goto cleanup;
  420 
  421                 error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset,
  422                     a_out->a_text + a_out->a_data, UIO_USERSPACE, 0,
  423                     td->td_ucred, NOCRED, &aresid, td);
  424                 if (error != 0)
  425                         goto cleanup;
  426                 if (aresid != 0) {
  427                         error = ENOEXEC;
  428                         goto cleanup;
  429                 }
  430         } else {
  431 #ifdef DEBUG
  432                 printf("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(&td->td_proc->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, OBJT_VNODE, vp, file_offset);
  447                 if (error)
  448                         goto cleanup;
  449         }
  450 #ifdef DEBUG
  451         printf("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(&td->td_proc->p_vmspace->vm_map, NULL, 0,
  461                     &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
  462                 if (error)
  463                         goto cleanup;
  464         }
  465 
  466 cleanup:
  467         /* Unlock vnode if needed */
  468         if (locked) {
  469                 VOP_UNLOCK(vp, 0);
  470                 VFS_UNLOCK_GIANT(vfslocked);
  471         }
  472 
  473         /* Release the temporary mapping. */
  474         if (a_out)
  475                 kmem_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE);
  476 
  477         return (error);
  478 }
  479 
  480 #endif  /* __i386__ */
  481 
  482 int
  483 linux_select(struct thread *td, struct linux_select_args *args)
  484 {
  485         l_timeval ltv;
  486         struct timeval tv0, tv1, utv, *tvp;
  487         int error;
  488 
  489 #ifdef DEBUG
  490         if (ldebug(select))
  491                 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
  492                     (void *)args->readfds, (void *)args->writefds,
  493                     (void *)args->exceptfds, (void *)args->timeout);
  494 #endif
  495 
  496         /*
  497          * Store current time for computation of the amount of
  498          * time left.
  499          */
  500         if (args->timeout) {
  501                 if ((error = copyin(args->timeout, &ltv, sizeof(ltv))))
  502                         goto select_out;
  503                 utv.tv_sec = ltv.tv_sec;
  504                 utv.tv_usec = ltv.tv_usec;
  505 #ifdef DEBUG
  506                 if (ldebug(select))
  507                         printf(LMSG("incoming timeout (%jd/%ld)"),
  508                             (intmax_t)utv.tv_sec, utv.tv_usec);
  509 #endif
  510 
  511                 if (itimerfix(&utv)) {
  512                         /*
  513                          * The timeval was invalid.  Convert it to something
  514                          * valid that will act as it does under Linux.
  515                          */
  516                         utv.tv_sec += utv.tv_usec / 1000000;
  517                         utv.tv_usec %= 1000000;
  518                         if (utv.tv_usec < 0) {
  519                                 utv.tv_sec -= 1;
  520                                 utv.tv_usec += 1000000;
  521                         }
  522                         if (utv.tv_sec < 0)
  523                                 timevalclear(&utv);
  524                 }
  525                 microtime(&tv0);
  526                 tvp = &utv;
  527         } else
  528                 tvp = NULL;
  529 
  530         error = kern_select(td, args->nfds, args->readfds, args->writefds,
  531             args->exceptfds, tvp, sizeof(l_int) * 8);
  532 
  533 #ifdef DEBUG
  534         if (ldebug(select))
  535                 printf(LMSG("real select returns %d"), error);
  536 #endif
  537         if (error)
  538                 goto select_out;
  539 
  540         if (args->timeout) {
  541                 if (td->td_retval[0]) {
  542                         /*
  543                          * Compute how much time was left of the timeout,
  544                          * by subtracting the current time and the time
  545                          * before we started the call, and subtracting
  546                          * that result from the user-supplied value.
  547                          */
  548                         microtime(&tv1);
  549                         timevalsub(&tv1, &tv0);
  550                         timevalsub(&utv, &tv1);
  551                         if (utv.tv_sec < 0)
  552                                 timevalclear(&utv);
  553                 } else
  554                         timevalclear(&utv);
  555 #ifdef DEBUG
  556                 if (ldebug(select))
  557                         printf(LMSG("outgoing timeout (%jd/%ld)"),
  558                             (intmax_t)utv.tv_sec, utv.tv_usec);
  559 #endif
  560                 ltv.tv_sec = utv.tv_sec;
  561                 ltv.tv_usec = utv.tv_usec;
  562                 if ((error = copyout(&ltv, args->timeout, sizeof(ltv))))
  563                         goto select_out;
  564         }
  565 
  566 select_out:
  567 #ifdef DEBUG
  568         if (ldebug(select))
  569                 printf(LMSG("select_out -> %d"), error);
  570 #endif
  571         return (error);
  572 }
  573 
  574 int
  575 linux_mremap(struct thread *td, struct linux_mremap_args *args)
  576 {
  577         struct munmap_args /* {
  578                 void *addr;
  579                 size_t len;
  580         } */ bsd_args;
  581         int error = 0;
  582 
  583 #ifdef DEBUG
  584         if (ldebug(mremap))
  585                 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
  586                     (void *)(uintptr_t)args->addr,
  587                     (unsigned long)args->old_len,
  588                     (unsigned long)args->new_len,
  589                     (unsigned long)args->flags);
  590 #endif
  591 
  592         if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) {
  593                 td->td_retval[0] = 0;
  594                 return (EINVAL);
  595         }
  596 
  597         /*
  598          * Check for the page alignment.
  599          * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK.
  600          */
  601         if (args->addr & PAGE_MASK) {
  602                 td->td_retval[0] = 0;
  603                 return (EINVAL);
  604         }
  605 
  606         args->new_len = round_page(args->new_len);
  607         args->old_len = round_page(args->old_len);
  608 
  609         if (args->new_len > args->old_len) {
  610                 td->td_retval[0] = 0;
  611                 return (ENOMEM);
  612         }
  613 
  614         if (args->new_len < args->old_len) {
  615                 bsd_args.addr =
  616                     (caddr_t)((uintptr_t)args->addr + args->new_len);
  617                 bsd_args.len = args->old_len - args->new_len;
  618                 error = sys_munmap(td, &bsd_args);
  619         }
  620 
  621         td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
  622         return (error);
  623 }
  624 
  625 #define LINUX_MS_ASYNC       0x0001
  626 #define LINUX_MS_INVALIDATE  0x0002
  627 #define LINUX_MS_SYNC        0x0004
  628 
  629 int
  630 linux_msync(struct thread *td, struct linux_msync_args *args)
  631 {
  632         struct msync_args bsd_args;
  633 
  634         bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
  635         bsd_args.len = (uintptr_t)args->len;
  636         bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
  637 
  638         return (sys_msync(td, &bsd_args));
  639 }
  640 
  641 int
  642 linux_time(struct thread *td, struct linux_time_args *args)
  643 {
  644         struct timeval tv;
  645         l_time_t tm;
  646         int error;
  647 
  648 #ifdef DEBUG
  649         if (ldebug(time))
  650                 printf(ARGS(time, "*"));
  651 #endif
  652 
  653         microtime(&tv);
  654         tm = tv.tv_sec;
  655         if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
  656                 return (error);
  657         td->td_retval[0] = tm;
  658         return (0);
  659 }
  660 
  661 struct l_times_argv {
  662         l_clock_t       tms_utime;
  663         l_clock_t       tms_stime;
  664         l_clock_t       tms_cutime;
  665         l_clock_t       tms_cstime;
  666 };
  667 
  668 
  669 /*
  670  * Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value.
  671  * Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK
  672  * auxiliary vector entry.
  673  */
  674 #define CLK_TCK         100
  675 
  676 #define CONVOTCK(r)     (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
  677 #define CONVNTCK(r)     (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz))
  678 
  679 #define CONVTCK(r)      (linux_kernver(td) >= LINUX_KERNVER_2004000 ?           \
  680                             CONVNTCK(r) : CONVOTCK(r))
  681 
  682 int
  683 linux_times(struct thread *td, struct linux_times_args *args)
  684 {
  685         struct timeval tv, utime, stime, cutime, cstime;
  686         struct l_times_argv tms;
  687         struct proc *p;
  688         int error;
  689 
  690 #ifdef DEBUG
  691         if (ldebug(times))
  692                 printf(ARGS(times, "*"));
  693 #endif
  694 
  695         if (args->buf != NULL) {
  696                 p = td->td_proc;
  697                 PROC_LOCK(p);
  698                 PROC_SLOCK(p);
  699                 calcru(p, &utime, &stime);
  700                 PROC_SUNLOCK(p);
  701                 calccru(p, &cutime, &cstime);
  702                 PROC_UNLOCK(p);
  703 
  704                 tms.tms_utime = CONVTCK(utime);
  705                 tms.tms_stime = CONVTCK(stime);
  706 
  707                 tms.tms_cutime = CONVTCK(cutime);
  708                 tms.tms_cstime = CONVTCK(cstime);
  709 
  710                 if ((error = copyout(&tms, args->buf, sizeof(tms))))
  711                         return (error);
  712         }
  713 
  714         microuptime(&tv);
  715         td->td_retval[0] = (int)CONVTCK(tv);
  716         return (0);
  717 }
  718 
  719 int
  720 linux_newuname(struct thread *td, struct linux_newuname_args *args)
  721 {
  722         struct l_new_utsname utsname;
  723         char osname[LINUX_MAX_UTSNAME];
  724         char osrelease[LINUX_MAX_UTSNAME];
  725         char *p;
  726 
  727 #ifdef DEBUG
  728         if (ldebug(newuname))
  729                 printf(ARGS(newuname, "*"));
  730 #endif
  731 
  732         linux_get_osname(td, osname);
  733         linux_get_osrelease(td, osrelease);
  734 
  735         bzero(&utsname, sizeof(utsname));
  736         strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
  737         getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
  738         getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME);
  739         strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
  740         strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
  741         for (p = utsname.version; *p != '\0'; ++p)
  742                 if (*p == '\n') {
  743                         *p = '\0';
  744                         break;
  745                 }
  746         strlcpy(utsname.machine, linux_platform, LINUX_MAX_UTSNAME);
  747 
  748         return (copyout(&utsname, args->buf, sizeof(utsname)));
  749 }
  750 
  751 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  752 struct l_utimbuf {
  753         l_time_t l_actime;
  754         l_time_t l_modtime;
  755 };
  756 
  757 int
  758 linux_utime(struct thread *td, struct linux_utime_args *args)
  759 {
  760         struct timeval tv[2], *tvp;
  761         struct l_utimbuf lut;
  762         char *fname;
  763         int error;
  764 
  765         LCONVPATHEXIST(td, args->fname, &fname);
  766 
  767 #ifdef DEBUG
  768         if (ldebug(utime))
  769                 printf(ARGS(utime, "%s, *"), fname);
  770 #endif
  771 
  772         if (args->times) {
  773                 if ((error = copyin(args->times, &lut, sizeof lut))) {
  774                         LFREEPATH(fname);
  775                         return (error);
  776                 }
  777                 tv[0].tv_sec = lut.l_actime;
  778                 tv[0].tv_usec = 0;
  779                 tv[1].tv_sec = lut.l_modtime;
  780                 tv[1].tv_usec = 0;
  781                 tvp = tv;
  782         } else
  783                 tvp = NULL;
  784 
  785         error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
  786         LFREEPATH(fname);
  787         return (error);
  788 }
  789 
  790 int
  791 linux_utimes(struct thread *td, struct linux_utimes_args *args)
  792 {
  793         l_timeval ltv[2];
  794         struct timeval tv[2], *tvp = NULL;
  795         char *fname;
  796         int error;
  797 
  798         LCONVPATHEXIST(td, args->fname, &fname);
  799 
  800 #ifdef DEBUG
  801         if (ldebug(utimes))
  802                 printf(ARGS(utimes, "%s, *"), fname);
  803 #endif
  804 
  805         if (args->tptr != NULL) {
  806                 if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
  807                         LFREEPATH(fname);
  808                         return (error);
  809                 }
  810                 tv[0].tv_sec = ltv[0].tv_sec;
  811                 tv[0].tv_usec = ltv[0].tv_usec;
  812                 tv[1].tv_sec = ltv[1].tv_sec;
  813                 tv[1].tv_usec = ltv[1].tv_usec;
  814                 tvp = tv;
  815         }
  816 
  817         error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
  818         LFREEPATH(fname);
  819         return (error);
  820 }
  821 
  822 int
  823 linux_futimesat(struct thread *td, struct linux_futimesat_args *args)
  824 {
  825         l_timeval ltv[2];
  826         struct timeval tv[2], *tvp = NULL;
  827         char *fname;
  828         int error, dfd;
  829 
  830         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  831         LCONVPATHEXIST_AT(td, args->filename, &fname, dfd);
  832 
  833 #ifdef DEBUG
  834         if (ldebug(futimesat))
  835                 printf(ARGS(futimesat, "%s, *"), fname);
  836 #endif
  837 
  838         if (args->utimes != NULL) {
  839                 if ((error = copyin(args->utimes, ltv, sizeof ltv))) {
  840                         LFREEPATH(fname);
  841                         return (error);
  842                 }
  843                 tv[0].tv_sec = ltv[0].tv_sec;
  844                 tv[0].tv_usec = ltv[0].tv_usec;
  845                 tv[1].tv_sec = ltv[1].tv_sec;
  846                 tv[1].tv_usec = ltv[1].tv_usec;
  847                 tvp = tv;
  848         }
  849 
  850         error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
  851         LFREEPATH(fname);
  852         return (error);
  853 }
  854 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
  855 
  856 int
  857 linux_common_wait(struct thread *td, int pid, int *status,
  858     int options, struct rusage *ru)
  859 {
  860         int error, tmpstat;
  861 
  862         error = kern_wait(td, pid, &tmpstat, options, ru);
  863         if (error)
  864                 return (error);
  865 
  866         if (status) {
  867                 tmpstat &= 0xffff;
  868                 if (WIFSIGNALED(tmpstat))
  869                         tmpstat = (tmpstat & 0xffffff80) |
  870                             BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
  871                 else if (WIFSTOPPED(tmpstat))
  872                         tmpstat = (tmpstat & 0xffff00ff) |
  873                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
  874                 error = copyout(&tmpstat, status, sizeof(int));
  875         }
  876 
  877         return (error);
  878 }
  879 
  880 int
  881 linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
  882 {
  883         int options;
  884  
  885 #ifdef DEBUG
  886         if (ldebug(waitpid))
  887                 printf(ARGS(waitpid, "%d, %p, %d"),
  888                     args->pid, (void *)args->status, args->options);
  889 #endif
  890         /*
  891          * this is necessary because the test in kern_wait doesn't work
  892          * because we mess with the options here
  893          */
  894         if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
  895                 return (EINVAL);
  896    
  897         options = (args->options & (WNOHANG | WUNTRACED));
  898         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
  899         if (args->options & __WCLONE)
  900                 options |= WLINUXCLONE;
  901 
  902         return (linux_common_wait(td, args->pid, args->status, options, NULL));
  903 }
  904 
  905 
  906 int
  907 linux_mknod(struct thread *td, struct linux_mknod_args *args)
  908 {
  909         char *path;
  910         int error;
  911 
  912         LCONVPATHCREAT(td, args->path, &path);
  913 
  914 #ifdef DEBUG
  915         if (ldebug(mknod))
  916                 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev);
  917 #endif
  918 
  919         switch (args->mode & S_IFMT) {
  920         case S_IFIFO:
  921         case S_IFSOCK:
  922                 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode);
  923                 break;
  924 
  925         case S_IFCHR:
  926         case S_IFBLK:
  927                 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode,
  928                     args->dev);
  929                 break;
  930 
  931         case S_IFDIR:
  932                 error = EPERM;
  933                 break;
  934 
  935         case 0:
  936                 args->mode |= S_IFREG;
  937                 /* FALLTHROUGH */
  938         case S_IFREG:
  939                 error = kern_open(td, path, UIO_SYSSPACE,
  940                     O_WRONLY | O_CREAT | O_TRUNC, args->mode);
  941                 if (error == 0)
  942                         kern_close(td, td->td_retval[0]);
  943                 break;
  944 
  945         default:
  946                 error = EINVAL;
  947                 break;
  948         }
  949         LFREEPATH(path);
  950         return (error);
  951 }
  952 
  953 int
  954 linux_mknodat(struct thread *td, struct linux_mknodat_args *args)
  955 {
  956         char *path;
  957         int error, dfd;
  958 
  959         dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
  960         LCONVPATHCREAT_AT(td, args->filename, &path, dfd);
  961 
  962 #ifdef DEBUG
  963         if (ldebug(mknodat))
  964                 printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev);
  965 #endif
  966 
  967         switch (args->mode & S_IFMT) {
  968         case S_IFIFO:
  969         case S_IFSOCK:
  970                 error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode);
  971                 break;
  972 
  973         case S_IFCHR:
  974         case S_IFBLK:
  975                 error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode,
  976                     args->dev);
  977                 break;
  978 
  979         case S_IFDIR:
  980                 error = EPERM;
  981                 break;
  982 
  983         case 0:
  984                 args->mode |= S_IFREG;
  985                 /* FALLTHROUGH */
  986         case S_IFREG:
  987                 error = kern_openat(td, dfd, path, UIO_SYSSPACE,
  988                     O_WRONLY | O_CREAT | O_TRUNC, args->mode);
  989                 if (error == 0)
  990                         kern_close(td, td->td_retval[0]);
  991                 break;
  992 
  993         default:
  994                 error = EINVAL;
  995                 break;
  996         }
  997         LFREEPATH(path);
  998         return (error);
  999 }
 1000 
 1001 /*
 1002  * UGH! This is just about the dumbest idea I've ever heard!!
 1003  */
 1004 int
 1005 linux_personality(struct thread *td, struct linux_personality_args *args)
 1006 {
 1007 #ifdef DEBUG
 1008         if (ldebug(personality))
 1009                 printf(ARGS(personality, "%lu"), (unsigned long)args->per);
 1010 #endif
 1011         if (args->per != 0)
 1012                 return (EINVAL);
 1013 
 1014         /* Yes Jim, it's still a Linux... */
 1015         td->td_retval[0] = 0;
 1016         return (0);
 1017 }
 1018 
 1019 struct l_itimerval {
 1020         l_timeval it_interval;
 1021         l_timeval it_value;
 1022 };
 1023 
 1024 #define B2L_ITIMERVAL(bip, lip)                                         \
 1025         (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec;          \
 1026         (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec;        \
 1027         (bip)->it_value.tv_sec = (lip)->it_value.tv_sec;                \
 1028         (bip)->it_value.tv_usec = (lip)->it_value.tv_usec;
 1029 
 1030 int
 1031 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap)
 1032 {
 1033         int error;
 1034         struct l_itimerval ls;
 1035         struct itimerval aitv, oitv;
 1036 
 1037 #ifdef DEBUG
 1038         if (ldebug(setitimer))
 1039                 printf(ARGS(setitimer, "%p, %p"),
 1040                     (void *)uap->itv, (void *)uap->oitv);
 1041 #endif
 1042 
 1043         if (uap->itv == NULL) {
 1044                 uap->itv = uap->oitv;
 1045                 return (linux_getitimer(td, (struct linux_getitimer_args *)uap));
 1046         }
 1047 
 1048         error = copyin(uap->itv, &ls, sizeof(ls));
 1049         if (error != 0)
 1050                 return (error);
 1051         B2L_ITIMERVAL(&aitv, &ls);
 1052 #ifdef DEBUG
 1053         if (ldebug(setitimer)) {
 1054                 printf("setitimer: value: sec: %jd, usec: %ld\n",
 1055                     (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec);
 1056                 printf("setitimer: interval: sec: %jd, usec: %ld\n",
 1057                     (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec);
 1058         }
 1059 #endif
 1060         error = kern_setitimer(td, uap->which, &aitv, &oitv);
 1061         if (error != 0 || uap->oitv == NULL)
 1062                 return (error);
 1063         B2L_ITIMERVAL(&ls, &oitv);
 1064 
 1065         return (copyout(&ls, uap->oitv, sizeof(ls)));
 1066 }
 1067 
 1068 int
 1069 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap)
 1070 {
 1071         int error;
 1072         struct l_itimerval ls;
 1073         struct itimerval aitv;
 1074 
 1075 #ifdef DEBUG
 1076         if (ldebug(getitimer))
 1077                 printf(ARGS(getitimer, "%p"), (void *)uap->itv);
 1078 #endif
 1079         error = kern_getitimer(td, uap->which, &aitv);
 1080         if (error != 0)
 1081                 return (error);
 1082         B2L_ITIMERVAL(&ls, &aitv);
 1083         return (copyout(&ls, uap->itv, sizeof(ls)));
 1084 }
 1085 
 1086 int
 1087 linux_nice(struct thread *td, struct linux_nice_args *args)
 1088 {
 1089         struct setpriority_args bsd_args;
 1090 
 1091         bsd_args.which = PRIO_PROCESS;
 1092         bsd_args.who = 0;               /* current process */
 1093         bsd_args.prio = args->inc;
 1094         return (sys_setpriority(td, &bsd_args));
 1095 }
 1096 
 1097 int
 1098 linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
 1099 {
 1100         struct ucred *newcred, *oldcred;
 1101         l_gid_t *linux_gidset;
 1102         gid_t *bsd_gidset;
 1103         int ngrp, error;
 1104         struct proc *p;
 1105 
 1106         ngrp = args->gidsetsize;
 1107         if (ngrp < 0 || ngrp >= ngroups_max + 1)
 1108                 return (EINVAL);
 1109         linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK);
 1110         error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
 1111         if (error)
 1112                 goto out;
 1113         newcred = crget();
 1114         p = td->td_proc;
 1115         PROC_LOCK(p);
 1116         oldcred = crcopysafe(p, newcred);
 1117 
 1118         /*
 1119          * cr_groups[0] holds egid. Setting the whole set from
 1120          * the supplied set will cause egid to be changed too.
 1121          * Keep cr_groups[0] unchanged to prevent that.
 1122          */
 1123 
 1124         if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) {
 1125                 PROC_UNLOCK(p);
 1126                 crfree(newcred);
 1127                 goto out;
 1128         }
 1129 
 1130         if (ngrp > 0) {
 1131                 newcred->cr_ngroups = ngrp + 1;
 1132 
 1133                 bsd_gidset = newcred->cr_groups;
 1134                 ngrp--;
 1135                 while (ngrp >= 0) {
 1136                         bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
 1137                         ngrp--;
 1138                 }
 1139         } else
 1140                 newcred->cr_ngroups = 1;
 1141 
 1142         setsugid(p);
 1143         p->p_ucred = newcred;
 1144         PROC_UNLOCK(p);
 1145         crfree(oldcred);
 1146         error = 0;
 1147 out:
 1148         free(linux_gidset, M_TEMP);
 1149         return (error);
 1150 }
 1151 
 1152 int
 1153 linux_getgroups(struct thread *td, struct linux_getgroups_args *args)
 1154 {
 1155         struct ucred *cred;
 1156         l_gid_t *linux_gidset;
 1157         gid_t *bsd_gidset;
 1158         int bsd_gidsetsz, ngrp, error;
 1159 
 1160         cred = td->td_ucred;
 1161         bsd_gidset = cred->cr_groups;
 1162         bsd_gidsetsz = cred->cr_ngroups - 1;
 1163 
 1164         /*
 1165          * cr_groups[0] holds egid. Returning the whole set
 1166          * here will cause a duplicate. Exclude cr_groups[0]
 1167          * to prevent that.
 1168          */
 1169 
 1170         if ((ngrp = args->gidsetsize) == 0) {
 1171                 td->td_retval[0] = bsd_gidsetsz;
 1172                 return (0);
 1173         }
 1174 
 1175         if (ngrp < bsd_gidsetsz)
 1176                 return (EINVAL);
 1177 
 1178         ngrp = 0;
 1179         linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset),
 1180             M_TEMP, M_WAITOK);
 1181         while (ngrp < bsd_gidsetsz) {
 1182                 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
 1183                 ngrp++;
 1184         }
 1185 
 1186         error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t));
 1187         free(linux_gidset, M_TEMP);
 1188         if (error)
 1189                 return (error);
 1190 
 1191         td->td_retval[0] = ngrp;
 1192         return (0);
 1193 }
 1194 
 1195 int
 1196 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args)
 1197 {
 1198         struct rlimit bsd_rlim;
 1199         struct l_rlimit rlim;
 1200         u_int which;
 1201         int error;
 1202 
 1203 #ifdef DEBUG
 1204         if (ldebug(setrlimit))
 1205                 printf(ARGS(setrlimit, "%d, %p"),
 1206                     args->resource, (void *)args->rlim);
 1207 #endif
 1208 
 1209         if (args->resource >= LINUX_RLIM_NLIMITS)
 1210                 return (EINVAL);
 1211 
 1212         which = linux_to_bsd_resource[args->resource];
 1213         if (which == -1)
 1214                 return (EINVAL);
 1215 
 1216         error = copyin(args->rlim, &rlim, sizeof(rlim));
 1217         if (error)
 1218                 return (error);
 1219 
 1220         bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur;
 1221         bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max;
 1222         return (kern_setrlimit(td, which, &bsd_rlim));
 1223 }
 1224 
 1225 int
 1226 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
 1227 {
 1228         struct l_rlimit rlim;
 1229         struct proc *p = td->td_proc;
 1230         struct rlimit bsd_rlim;
 1231         u_int which;
 1232 
 1233 #ifdef DEBUG
 1234         if (ldebug(old_getrlimit))
 1235                 printf(ARGS(old_getrlimit, "%d, %p"),
 1236                     args->resource, (void *)args->rlim);
 1237 #endif
 1238 
 1239         if (args->resource >= LINUX_RLIM_NLIMITS)
 1240                 return (EINVAL);
 1241 
 1242         which = linux_to_bsd_resource[args->resource];
 1243         if (which == -1)
 1244                 return (EINVAL);
 1245 
 1246         PROC_LOCK(p);
 1247         lim_rlimit(p, which, &bsd_rlim);
 1248         PROC_UNLOCK(p);
 1249 
 1250 #ifdef COMPAT_LINUX32
 1251         rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur;
 1252         if (rlim.rlim_cur == UINT_MAX)
 1253                 rlim.rlim_cur = INT_MAX;
 1254         rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max;
 1255         if (rlim.rlim_max == UINT_MAX)
 1256                 rlim.rlim_max = INT_MAX;
 1257 #else
 1258         rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur;
 1259         if (rlim.rlim_cur == ULONG_MAX)
 1260                 rlim.rlim_cur = LONG_MAX;
 1261         rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max;
 1262         if (rlim.rlim_max == ULONG_MAX)
 1263                 rlim.rlim_max = LONG_MAX;
 1264 #endif
 1265         return (copyout(&rlim, args->rlim, sizeof(rlim)));
 1266 }
 1267 
 1268 int
 1269 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
 1270 {
 1271         struct l_rlimit rlim;
 1272         struct proc *p = td->td_proc;
 1273         struct rlimit bsd_rlim;
 1274         u_int which;
 1275 
 1276 #ifdef DEBUG
 1277         if (ldebug(getrlimit))
 1278                 printf(ARGS(getrlimit, "%d, %p"),
 1279                     args->resource, (void *)args->rlim);
 1280 #endif
 1281 
 1282         if (args->resource >= LINUX_RLIM_NLIMITS)
 1283                 return (EINVAL);
 1284 
 1285         which = linux_to_bsd_resource[args->resource];
 1286         if (which == -1)
 1287                 return (EINVAL);
 1288 
 1289         PROC_LOCK(p);
 1290         lim_rlimit(p, which, &bsd_rlim);
 1291         PROC_UNLOCK(p);
 1292 
 1293         rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur;
 1294         rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max;
 1295         return (copyout(&rlim, args->rlim, sizeof(rlim)));
 1296 }
 1297 
 1298 int
 1299 linux_sched_setscheduler(struct thread *td,
 1300     struct linux_sched_setscheduler_args *args)
 1301 {
 1302         struct sched_setscheduler_args bsd;
 1303 
 1304 #ifdef DEBUG
 1305         if (ldebug(sched_setscheduler))
 1306                 printf(ARGS(sched_setscheduler, "%d, %d, %p"),
 1307                     args->pid, args->policy, (const void *)args->param);
 1308 #endif
 1309 
 1310         switch (args->policy) {
 1311         case LINUX_SCHED_OTHER:
 1312                 bsd.policy = SCHED_OTHER;
 1313                 break;
 1314         case LINUX_SCHED_FIFO:
 1315                 bsd.policy = SCHED_FIFO;
 1316                 break;
 1317         case LINUX_SCHED_RR:
 1318                 bsd.policy = SCHED_RR;
 1319                 break;
 1320         default:
 1321                 return (EINVAL);
 1322         }
 1323 
 1324         bsd.pid = args->pid;
 1325         bsd.param = (struct sched_param *)args->param;
 1326         return (sys_sched_setscheduler(td, &bsd));
 1327 }
 1328 
 1329 int
 1330 linux_sched_getscheduler(struct thread *td,
 1331     struct linux_sched_getscheduler_args *args)
 1332 {
 1333         struct sched_getscheduler_args bsd;
 1334         int error;
 1335 
 1336 #ifdef DEBUG
 1337         if (ldebug(sched_getscheduler))
 1338                 printf(ARGS(sched_getscheduler, "%d"), args->pid);
 1339 #endif
 1340 
 1341         bsd.pid = args->pid;
 1342         error = sys_sched_getscheduler(td, &bsd);
 1343 
 1344         switch (td->td_retval[0]) {
 1345         case SCHED_OTHER:
 1346                 td->td_retval[0] = LINUX_SCHED_OTHER;
 1347                 break;
 1348         case SCHED_FIFO:
 1349                 td->td_retval[0] = LINUX_SCHED_FIFO;
 1350                 break;
 1351         case SCHED_RR:
 1352                 td->td_retval[0] = LINUX_SCHED_RR;
 1353                 break;
 1354         }
 1355 
 1356         return (error);
 1357 }
 1358 
 1359 int
 1360 linux_sched_get_priority_max(struct thread *td,
 1361     struct linux_sched_get_priority_max_args *args)
 1362 {
 1363         struct sched_get_priority_max_args bsd;
 1364 
 1365 #ifdef DEBUG
 1366         if (ldebug(sched_get_priority_max))
 1367                 printf(ARGS(sched_get_priority_max, "%d"), args->policy);
 1368 #endif
 1369 
 1370         switch (args->policy) {
 1371         case LINUX_SCHED_OTHER:
 1372                 bsd.policy = SCHED_OTHER;
 1373                 break;
 1374         case LINUX_SCHED_FIFO:
 1375                 bsd.policy = SCHED_FIFO;
 1376                 break;
 1377         case LINUX_SCHED_RR:
 1378                 bsd.policy = SCHED_RR;
 1379                 break;
 1380         default:
 1381                 return (EINVAL);
 1382         }
 1383         return (sys_sched_get_priority_max(td, &bsd));
 1384 }
 1385 
 1386 int
 1387 linux_sched_get_priority_min(struct thread *td,
 1388     struct linux_sched_get_priority_min_args *args)
 1389 {
 1390         struct sched_get_priority_min_args bsd;
 1391 
 1392 #ifdef DEBUG
 1393         if (ldebug(sched_get_priority_min))
 1394                 printf(ARGS(sched_get_priority_min, "%d"), args->policy);
 1395 #endif
 1396 
 1397         switch (args->policy) {
 1398         case LINUX_SCHED_OTHER:
 1399                 bsd.policy = SCHED_OTHER;
 1400                 break;
 1401         case LINUX_SCHED_FIFO:
 1402                 bsd.policy = SCHED_FIFO;
 1403                 break;
 1404         case LINUX_SCHED_RR:
 1405                 bsd.policy = SCHED_RR;
 1406                 break;
 1407         default:
 1408                 return (EINVAL);
 1409         }
 1410         return (sys_sched_get_priority_min(td, &bsd));
 1411 }
 1412 
 1413 #define REBOOT_CAD_ON   0x89abcdef
 1414 #define REBOOT_CAD_OFF  0
 1415 #define REBOOT_HALT     0xcdef0123
 1416 #define REBOOT_RESTART  0x01234567
 1417 #define REBOOT_RESTART2 0xA1B2C3D4
 1418 #define REBOOT_POWEROFF 0x4321FEDC
 1419 #define REBOOT_MAGIC1   0xfee1dead
 1420 #define REBOOT_MAGIC2   0x28121969
 1421 #define REBOOT_MAGIC2A  0x05121996
 1422 #define REBOOT_MAGIC2B  0x16041998
 1423 
 1424 int
 1425 linux_reboot(struct thread *td, struct linux_reboot_args *args)
 1426 {
 1427         struct reboot_args bsd_args;
 1428 
 1429 #ifdef DEBUG
 1430         if (ldebug(reboot))
 1431                 printf(ARGS(reboot, "0x%x"), args->cmd);
 1432 #endif
 1433 
 1434         if (args->magic1 != REBOOT_MAGIC1)
 1435                 return (EINVAL);
 1436 
 1437         switch (args->magic2) {
 1438         case REBOOT_MAGIC2:
 1439         case REBOOT_MAGIC2A:
 1440         case REBOOT_MAGIC2B:
 1441                 break;
 1442         default:
 1443                 return (EINVAL);
 1444         }
 1445 
 1446         switch (args->cmd) {
 1447         case REBOOT_CAD_ON:
 1448         case REBOOT_CAD_OFF:
 1449                 return (priv_check(td, PRIV_REBOOT));
 1450         case REBOOT_HALT:
 1451                 bsd_args.opt = RB_HALT;
 1452                 break;
 1453         case REBOOT_RESTART:
 1454         case REBOOT_RESTART2:
 1455                 bsd_args.opt = 0;
 1456                 break;
 1457         case REBOOT_POWEROFF:
 1458                 bsd_args.opt = RB_POWEROFF;
 1459                 break;
 1460         default:
 1461                 return (EINVAL);
 1462         }
 1463         return (sys_reboot(td, &bsd_args));
 1464 }
 1465 
 1466 
 1467 /*
 1468  * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
 1469  * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that
 1470  * are assumed to be preserved. The following lightweight syscalls fixes
 1471  * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c
 1472  *
 1473  * linux_getpid() - MP SAFE
 1474  * linux_getgid() - MP SAFE
 1475  * linux_getuid() - MP SAFE
 1476  */
 1477 
 1478 int
 1479 linux_getpid(struct thread *td, struct linux_getpid_args *args)
 1480 {
 1481         struct linux_emuldata *em;
 1482 
 1483 #ifdef DEBUG
 1484         if (ldebug(getpid))
 1485                 printf(ARGS(getpid, ""));
 1486 #endif
 1487 
 1488         if (linux_use26(td)) {
 1489                 em = em_find(td->td_proc, EMUL_DONTLOCK);
 1490                 KASSERT(em != NULL, ("getpid: emuldata not found.\n"));
 1491                 td->td_retval[0] = em->shared->group_pid;
 1492         } else {
 1493                 td->td_retval[0] = td->td_proc->p_pid;
 1494         }
 1495 
 1496         return (0);
 1497 }
 1498 
 1499 int
 1500 linux_gettid(struct thread *td, struct linux_gettid_args *args)
 1501 {
 1502 
 1503 #ifdef DEBUG
 1504         if (ldebug(gettid))
 1505                 printf(ARGS(gettid, ""));
 1506 #endif
 1507 
 1508         td->td_retval[0] = td->td_proc->p_pid;
 1509         return (0);
 1510 }
 1511 
 1512 
 1513 int
 1514 linux_getppid(struct thread *td, struct linux_getppid_args *args)
 1515 {
 1516         struct linux_emuldata *em;
 1517         struct proc *p, *pp;
 1518 
 1519 #ifdef DEBUG
 1520         if (ldebug(getppid))
 1521                 printf(ARGS(getppid, ""));
 1522 #endif
 1523 
 1524         if (!linux_use26(td)) {
 1525                 PROC_LOCK(td->td_proc);
 1526                 td->td_retval[0] = td->td_proc->p_pptr->p_pid;
 1527                 PROC_UNLOCK(td->td_proc);
 1528                 return (0);
 1529         }
 1530 
 1531         em = em_find(td->td_proc, EMUL_DONTLOCK);
 1532 
 1533         KASSERT(em != NULL, ("getppid: process emuldata not found.\n"));
 1534 
 1535         /* find the group leader */
 1536         p = pfind(em->shared->group_pid);
 1537 
 1538         if (p == NULL) {
 1539 #ifdef DEBUG
 1540                 printf(LMSG("parent process not found.\n"));
 1541 #endif
 1542                 return (0);
 1543         }
 1544 
 1545         pp = p->p_pptr;         /* switch to parent */
 1546         PROC_LOCK(pp);
 1547         PROC_UNLOCK(p);
 1548 
 1549         /* if its also linux process */
 1550         if (pp->p_sysent == &elf_linux_sysvec) {
 1551                 em = em_find(pp, EMUL_DONTLOCK);
 1552                 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n"));
 1553 
 1554                 td->td_retval[0] = em->shared->group_pid;
 1555         } else
 1556                 td->td_retval[0] = pp->p_pid;
 1557 
 1558         PROC_UNLOCK(pp);
 1559 
 1560         return (0);
 1561 }
 1562 
 1563 int
 1564 linux_getgid(struct thread *td, struct linux_getgid_args *args)
 1565 {
 1566 
 1567 #ifdef DEBUG
 1568         if (ldebug(getgid))
 1569                 printf(ARGS(getgid, ""));
 1570 #endif
 1571 
 1572         td->td_retval[0] = td->td_ucred->cr_rgid;
 1573         return (0);
 1574 }
 1575 
 1576 int
 1577 linux_getuid(struct thread *td, struct linux_getuid_args *args)
 1578 {
 1579 
 1580 #ifdef DEBUG
 1581         if (ldebug(getuid))
 1582                 printf(ARGS(getuid, ""));
 1583 #endif
 1584 
 1585         td->td_retval[0] = td->td_ucred->cr_ruid;
 1586         return (0);
 1587 }
 1588 
 1589 
 1590 int
 1591 linux_getsid(struct thread *td, struct linux_getsid_args *args)
 1592 {
 1593         struct getsid_args bsd;
 1594 
 1595 #ifdef DEBUG
 1596         if (ldebug(getsid))
 1597                 printf(ARGS(getsid, "%i"), args->pid);
 1598 #endif
 1599 
 1600         bsd.pid = args->pid;
 1601         return (sys_getsid(td, &bsd));
 1602 }
 1603 
 1604 int
 1605 linux_nosys(struct thread *td, struct nosys_args *ignore)
 1606 {
 1607 
 1608         return (ENOSYS);
 1609 }
 1610 
 1611 int
 1612 linux_getpriority(struct thread *td, struct linux_getpriority_args *args)
 1613 {
 1614         struct getpriority_args bsd_args;
 1615         int error;
 1616 
 1617 #ifdef DEBUG
 1618         if (ldebug(getpriority))
 1619                 printf(ARGS(getpriority, "%i, %i"), args->which, args->who);
 1620 #endif
 1621 
 1622         bsd_args.which = args->which;
 1623         bsd_args.who = args->who;
 1624         error = sys_getpriority(td, &bsd_args);
 1625         td->td_retval[0] = 20 - td->td_retval[0];
 1626         return (error);
 1627 }
 1628 
 1629 int
 1630 linux_sethostname(struct thread *td, struct linux_sethostname_args *args)
 1631 {
 1632         int name[2];
 1633 
 1634 #ifdef DEBUG
 1635         if (ldebug(sethostname))
 1636                 printf(ARGS(sethostname, "*, %i"), args->len);
 1637 #endif
 1638 
 1639         name[0] = CTL_KERN;
 1640         name[1] = KERN_HOSTNAME;
 1641         return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname,
 1642             args->len, 0, 0));
 1643 }
 1644 
 1645 int
 1646 linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args)
 1647 {
 1648         int name[2];
 1649 
 1650 #ifdef DEBUG
 1651         if (ldebug(setdomainname))
 1652                 printf(ARGS(setdomainname, "*, %i"), args->len);
 1653 #endif
 1654 
 1655         name[0] = CTL_KERN;
 1656         name[1] = KERN_NISDOMAINNAME;
 1657         return (userland_sysctl(td, name, 2, 0, 0, 0, args->name,
 1658             args->len, 0, 0));
 1659 }
 1660 
 1661 int
 1662 linux_exit_group(struct thread *td, struct linux_exit_group_args *args)
 1663 {
 1664         struct linux_emuldata *em;
 1665 
 1666 #ifdef DEBUG
 1667         if (ldebug(exit_group))
 1668                 printf(ARGS(exit_group, "%i"), args->error_code);
 1669 #endif
 1670 
 1671         em = em_find(td->td_proc, EMUL_DONTLOCK);
 1672         if (em->shared->refs > 1) {
 1673                 EMUL_SHARED_WLOCK(&emul_shared_lock);
 1674                 em->shared->flags |= EMUL_SHARED_HASXSTAT;
 1675                 em->shared->xstat = W_EXITCODE(args->error_code, 0);
 1676                 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
 1677                 if (linux_use26(td))
 1678                         linux_kill_threads(td, SIGKILL);
 1679         }
 1680 
 1681         /*
 1682          * XXX: we should send a signal to the parent if
 1683          * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?)
 1684          * as it doesnt occur often.
 1685          */
 1686         exit1(td, W_EXITCODE(args->error_code, 0));
 1687 
 1688         return (0);
 1689 }
 1690 
 1691 #define _LINUX_CAPABILITY_VERSION  0x19980330
 1692 
 1693 struct l_user_cap_header {
 1694         l_int   version;
 1695         l_int   pid;
 1696 };
 1697 
 1698 struct l_user_cap_data {
 1699         l_int   effective;
 1700         l_int   permitted;
 1701         l_int   inheritable;
 1702 };
 1703 
 1704 int
 1705 linux_capget(struct thread *td, struct linux_capget_args *args)
 1706 {
 1707         struct l_user_cap_header luch;
 1708         struct l_user_cap_data lucd;
 1709         int error;
 1710 
 1711         if (args->hdrp == NULL)
 1712                 return (EFAULT);
 1713 
 1714         error = copyin(args->hdrp, &luch, sizeof(luch));
 1715         if (error != 0)
 1716                 return (error);
 1717 
 1718         if (luch.version != _LINUX_CAPABILITY_VERSION) {
 1719                 luch.version = _LINUX_CAPABILITY_VERSION;
 1720                 error = copyout(&luch, args->hdrp, sizeof(luch));
 1721                 if (error)
 1722                         return (error);
 1723                 return (EINVAL);
 1724         }
 1725 
 1726         if (luch.pid)
 1727                 return (EPERM);
 1728 
 1729         if (args->datap) {
 1730                 /*
 1731                  * The current implementation doesn't support setting
 1732                  * a capability (it's essentially a stub) so indicate
 1733                  * that no capabilities are currently set or available
 1734                  * to request.
 1735                  */
 1736                 bzero (&lucd, sizeof(lucd));
 1737                 error = copyout(&lucd, args->datap, sizeof(lucd));
 1738         }
 1739 
 1740         return (error);
 1741 }
 1742 
 1743 int
 1744 linux_capset(struct thread *td, struct linux_capset_args *args)
 1745 {
 1746         struct l_user_cap_header luch;
 1747         struct l_user_cap_data lucd;
 1748         int error;
 1749 
 1750         if (args->hdrp == NULL || args->datap == NULL)
 1751                 return (EFAULT);
 1752 
 1753         error = copyin(args->hdrp, &luch, sizeof(luch));
 1754         if (error != 0)
 1755                 return (error);
 1756 
 1757         if (luch.version != _LINUX_CAPABILITY_VERSION) {
 1758                 luch.version = _LINUX_CAPABILITY_VERSION;
 1759                 error = copyout(&luch, args->hdrp, sizeof(luch));
 1760                 if (error)
 1761                         return (error);
 1762                 return (EINVAL);
 1763         }
 1764 
 1765         if (luch.pid)
 1766                 return (EPERM);
 1767 
 1768         error = copyin(args->datap, &lucd, sizeof(lucd));
 1769         if (error != 0)
 1770                 return (error);
 1771 
 1772         /* We currently don't support setting any capabilities. */
 1773         if (lucd.effective || lucd.permitted || lucd.inheritable) {
 1774                 linux_msg(td,
 1775                           "capset effective=0x%x, permitted=0x%x, "
 1776                           "inheritable=0x%x is not implemented",
 1777                           (int)lucd.effective, (int)lucd.permitted,
 1778                           (int)lucd.inheritable);
 1779                 return (EPERM);
 1780         }
 1781 
 1782         return (0);
 1783 }
 1784 
 1785 int
 1786 linux_prctl(struct thread *td, struct linux_prctl_args *args)
 1787 {
 1788         int error = 0, max_size;
 1789         struct proc *p = td->td_proc;
 1790         char comm[LINUX_MAX_COMM_LEN];
 1791         struct linux_emuldata *em;
 1792         int pdeath_signal;
 1793 
 1794 #ifdef DEBUG
 1795         if (ldebug(prctl))
 1796                 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option,
 1797                     args->arg2, args->arg3, args->arg4, args->arg5);
 1798 #endif
 1799 
 1800         switch (args->option) {
 1801         case LINUX_PR_SET_PDEATHSIG:
 1802                 if (!LINUX_SIG_VALID(args->arg2))
 1803                         return (EINVAL);
 1804                 em = em_find(p, EMUL_DOLOCK);
 1805                 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
 1806                 em->pdeath_signal = args->arg2;
 1807                 EMUL_UNLOCK(&emul_lock);
 1808                 break;
 1809         case LINUX_PR_GET_PDEATHSIG:
 1810                 em = em_find(p, EMUL_DOLOCK);
 1811                 KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
 1812                 pdeath_signal = em->pdeath_signal;
 1813                 EMUL_UNLOCK(&emul_lock);
 1814                 error = copyout(&pdeath_signal,
 1815                     (void *)(register_t)args->arg2,
 1816                     sizeof(pdeath_signal));
 1817                 break;
 1818         case LINUX_PR_GET_KEEPCAPS:
 1819                 /*
 1820                  * Indicate that we always clear the effective and
 1821                  * permitted capability sets when the user id becomes
 1822                  * non-zero (actually the capability sets are simply
 1823                  * always zero in the current implementation).
 1824                  */
 1825                 td->td_retval[0] = 0;
 1826                 break;
 1827         case LINUX_PR_SET_KEEPCAPS:
 1828                 /*
 1829                  * Ignore requests to keep the effective and permitted
 1830                  * capability sets when the user id becomes non-zero.
 1831                  */
 1832                 break;
 1833         case LINUX_PR_SET_NAME:
 1834                 /*
 1835                  * To be on the safe side we need to make sure to not
 1836                  * overflow the size a linux program expects. We already
 1837                  * do this here in the copyin, so that we don't need to
 1838                  * check on copyout.
 1839                  */
 1840                 max_size = MIN(sizeof(comm), sizeof(p->p_comm));
 1841                 error = copyinstr((void *)(register_t)args->arg2, comm,
 1842                     max_size, NULL);
 1843 
 1844                 /* Linux silently truncates the name if it is too long. */
 1845                 if (error == ENAMETOOLONG) {
 1846                         /*
 1847                          * XXX: copyinstr() isn't documented to populate the
 1848                          * array completely, so do a copyin() to be on the
 1849                          * safe side. This should be changed in case
 1850                          * copyinstr() is changed to guarantee this.
 1851                          */
 1852                         error = copyin((void *)(register_t)args->arg2, comm,
 1853                             max_size - 1);
 1854                         comm[max_size - 1] = '\0';
 1855                 }
 1856                 if (error)
 1857                         return (error);
 1858 
 1859                 PROC_LOCK(p);
 1860                 strlcpy(p->p_comm, comm, sizeof(p->p_comm));
 1861                 PROC_UNLOCK(p);
 1862                 break;
 1863         case LINUX_PR_GET_NAME:
 1864                 PROC_LOCK(p);
 1865                 strlcpy(comm, p->p_comm, sizeof(comm));
 1866                 PROC_UNLOCK(p);
 1867                 error = copyout(comm, (void *)(register_t)args->arg2,
 1868                     strlen(comm) + 1);
 1869                 break;
 1870         default:
 1871                 error = EINVAL;
 1872                 break;
 1873         }
 1874 
 1875         return (error);
 1876 }
 1877 
 1878 /*
 1879  * Get affinity of a process.
 1880  */
 1881 int
 1882 linux_sched_getaffinity(struct thread *td,
 1883     struct linux_sched_getaffinity_args *args)
 1884 {
 1885         int error;
 1886         struct cpuset_getaffinity_args cga;
 1887 
 1888 #ifdef DEBUG
 1889         if (ldebug(sched_getaffinity))
 1890                 printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid,
 1891                     args->len);
 1892 #endif
 1893         if (args->len < sizeof(cpuset_t))
 1894                 return (EINVAL);
 1895 
 1896         cga.level = CPU_LEVEL_WHICH;
 1897         cga.which = CPU_WHICH_PID;
 1898         cga.id = args->pid;
 1899         cga.cpusetsize = sizeof(cpuset_t);
 1900         cga.mask = (cpuset_t *) args->user_mask_ptr;
 1901 
 1902         if ((error = sys_cpuset_getaffinity(td, &cga)) == 0)
 1903                 td->td_retval[0] = sizeof(cpuset_t);
 1904 
 1905         return (error);
 1906 }
 1907 
 1908 /*
 1909  *  Set affinity of a process.
 1910  */
 1911 int
 1912 linux_sched_setaffinity(struct thread *td,
 1913     struct linux_sched_setaffinity_args *args)
 1914 {
 1915         struct cpuset_setaffinity_args csa;
 1916 
 1917 #ifdef DEBUG
 1918         if (ldebug(sched_setaffinity))
 1919                 printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid,
 1920                     args->len);
 1921 #endif
 1922         if (args->len < sizeof(cpuset_t))
 1923                 return (EINVAL);
 1924 
 1925         csa.level = CPU_LEVEL_WHICH;
 1926         csa.which = CPU_WHICH_PID;
 1927         csa.id = args->pid;
 1928         csa.cpusetsize = sizeof(cpuset_t);
 1929         csa.mask = (cpuset_t *) args->user_mask_ptr;
 1930 
 1931         return (sys_cpuset_setaffinity(td, &csa));
 1932 }

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