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 Søren 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("$FreeBSD$");
   32 
   33 #include "opt_mac.h"
   34 
   35 #include <sys/param.h>
   36 #include <sys/blist.h>
   37 #include <sys/fcntl.h>
   38 #if defined(__i386__) || defined(__alpha__)
   39 #include <sys/imgact_aout.h>
   40 #endif
   41 #include <sys/jail.h>
   42 #include <sys/kernel.h>
   43 #include <sys/limits.h>
   44 #include <sys/lock.h>
   45 #include <sys/mac.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/proc.h>
   52 #include <sys/reboot.h>
   53 #include <sys/resourcevar.h>
   54 #include <sys/signalvar.h>
   55 #include <sys/stat.h>
   56 #include <sys/syscallsubr.h>
   57 #include <sys/sysctl.h>
   58 #include <sys/sysproto.h>
   59 #include <sys/systm.h>
   60 #include <sys/time.h>
   61 #include <sys/vmmeter.h>
   62 #include <sys/vnode.h>
   63 #include <sys/wait.h>
   64 
   65 #include <vm/vm.h>
   66 #include <vm/pmap.h>
   67 #include <vm/vm_kern.h>
   68 #include <vm/vm_map.h>
   69 #include <vm/vm_extern.h>
   70 #include <vm/vm_object.h>
   71 #include <vm/swap_pager.h>
   72 
   73 #include <posix4/sched.h>
   74 
   75 #include "opt_compat.h"
   76 
   77 #include <compat/linux/linux_sysproto.h>
   78 
   79 #ifdef COMPAT_LINUX32
   80 #include <machine/../linux32/linux.h>
   81 #include <machine/../linux32/linux32_proto.h>
   82 #else
   83 #include <machine/../linux/linux.h>
   84 #include <machine/../linux/linux_proto.h>
   85 #endif
   86 
   87 #include <compat/linux/linux_mib.h>
   88 #include <compat/linux/linux_util.h>
   89 
   90 #ifdef __i386__
   91 #include <machine/cputypes.h>
   92 #endif
   93 
   94 #ifdef __alpha__
   95 #define BSD_TO_LINUX_SIGNAL(sig)       (sig)
   96 #else
   97 #define BSD_TO_LINUX_SIGNAL(sig)        \
   98         (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig)
   99 #endif
  100 
  101 #ifndef __alpha__
  102 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
  103         RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
  104         RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
  105         RLIMIT_MEMLOCK, RLIMIT_AS
  106 };
  107 #endif /*!__alpha__*/
  108 
  109 struct l_sysinfo {
  110         l_long          uptime;         /* Seconds since boot */
  111         l_ulong         loads[3];       /* 1, 5, and 15 minute load averages */
  112 #define LINUX_SYSINFO_LOADS_SCALE 65536
  113         l_ulong         totalram;       /* Total usable main memory size */
  114         l_ulong         freeram;        /* Available memory size */
  115         l_ulong         sharedram;      /* Amount of shared memory */
  116         l_ulong         bufferram;      /* Memory used by buffers */
  117         l_ulong         totalswap;      /* Total swap space size */
  118         l_ulong         freeswap;       /* swap space still available */
  119         l_ushort        procs;          /* Number of current processes */
  120         l_ulong         totalbig;
  121         l_ulong         freebig;
  122         l_uint          mem_unit;
  123         char            _f[6];          /* Pads structure to 64 bytes */
  124 };
  125 #ifndef __alpha__
  126 int
  127 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args)
  128 {
  129         struct l_sysinfo sysinfo;
  130         vm_object_t object;
  131         int i, j;
  132         struct timespec ts;
  133 
  134         getnanouptime(&ts);
  135         if (ts.tv_nsec != 0)
  136                 ts.tv_sec++;
  137         sysinfo.uptime = ts.tv_sec;
  138 
  139         /* Use the information from the mib to get our load averages */
  140         for (i = 0; i < 3; i++)
  141                 sysinfo.loads[i] = averunnable.ldavg[i] *
  142                     LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
  143 
  144         sysinfo.totalram = physmem * PAGE_SIZE;
  145         sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE;
  146 
  147         sysinfo.sharedram = 0;
  148         mtx_lock(&vm_object_list_mtx);
  149         TAILQ_FOREACH(object, &vm_object_list, object_list)
  150                 if (object->shadow_count > 1)
  151                         sysinfo.sharedram += object->resident_page_count;
  152         mtx_unlock(&vm_object_list_mtx);
  153 
  154         sysinfo.sharedram *= PAGE_SIZE;
  155         sysinfo.bufferram = 0;
  156 
  157         swap_pager_status(&i, &j);
  158         sysinfo.totalswap = i * PAGE_SIZE;
  159         sysinfo.freeswap = (i - j) * PAGE_SIZE;
  160 
  161         sysinfo.procs = nprocs;
  162 
  163         /* The following are only present in newer Linux kernels. */
  164         sysinfo.totalbig = 0;
  165         sysinfo.freebig = 0;
  166         sysinfo.mem_unit = 1;
  167 
  168         return copyout(&sysinfo, args->info, sizeof(sysinfo));
  169 }
  170 #endif /*!__alpha__*/
  171 
  172 #ifndef __alpha__
  173 int
  174 linux_alarm(struct thread *td, struct linux_alarm_args *args)
  175 {
  176         struct itimerval it, old_it;
  177         int error;
  178 
  179 #ifdef DEBUG
  180         if (ldebug(alarm))
  181                 printf(ARGS(alarm, "%u"), args->secs);
  182 #endif
  183 
  184         if (args->secs > 100000000)
  185                 return (EINVAL);
  186 
  187         it.it_value.tv_sec = (long)args->secs;
  188         it.it_value.tv_usec = 0;
  189         it.it_interval.tv_sec = 0;
  190         it.it_interval.tv_usec = 0;
  191         error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
  192         if (error)
  193                 return (error);
  194         if (timevalisset(&old_it.it_value)) {           
  195                 if (old_it.it_value.tv_usec != 0)
  196                         old_it.it_value.tv_sec++;
  197                 td->td_retval[0] = old_it.it_value.tv_sec;
  198         }
  199         return (0);
  200 }
  201 #endif /*!__alpha__*/
  202 
  203 int
  204 linux_brk(struct thread *td, struct linux_brk_args *args)
  205 {
  206         struct vmspace *vm = td->td_proc->p_vmspace;
  207         vm_offset_t new, old;
  208         struct obreak_args /* {
  209                 char * nsize;
  210         } */ tmp;
  211 
  212 #ifdef DEBUG
  213         if (ldebug(brk))
  214                 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
  215 #endif
  216         old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
  217         new = (vm_offset_t)args->dsend;
  218         tmp.nsize = (char *)new;
  219         if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp))
  220                 td->td_retval[0] = (long)new;
  221         else
  222                 td->td_retval[0] = (long)old;
  223 
  224         return 0;
  225 }
  226 
  227 #if defined(__i386__) || defined(__alpha__)
  228 
  229 int
  230 linux_uselib(struct thread *td, struct linux_uselib_args *args)
  231 {
  232         struct nameidata ni;
  233         struct vnode *vp;
  234         struct exec *a_out;
  235         struct vattr attr;
  236         vm_offset_t vmaddr;
  237         unsigned long file_offset;
  238         vm_offset_t buffer;
  239         unsigned long bss_size;
  240         char *library;
  241         int error;
  242         int locked;
  243 
  244         LCONVPATHEXIST(td, args->library, &library);
  245 
  246 #ifdef DEBUG
  247         if (ldebug(uselib))
  248                 printf(ARGS(uselib, "%s"), library);
  249 #endif
  250 
  251         a_out = NULL;
  252         locked = 0;
  253         vp = NULL;
  254 
  255         /*
  256          * XXX: This code should make use of vn_open(), rather than doing
  257          * all this stuff itself.
  258          */
  259         NDINIT(&ni, LOOKUP, ISOPEN|FOLLOW|LOCKLEAF, UIO_SYSSPACE, library, td);
  260         error = namei(&ni);
  261         LFREEPATH(library);
  262         if (error)
  263                 goto cleanup;
  264 
  265         vp = ni.ni_vp;
  266         /*
  267          * XXX - This looks like a bogus check. A LOCKLEAF namei should not
  268          * succeed without returning a vnode.
  269          */
  270         if (vp == NULL) {
  271                 error = ENOEXEC;        /* ?? */
  272                 goto cleanup;
  273         }
  274         NDFREE(&ni, NDF_ONLY_PNBUF);
  275 
  276         /*
  277          * From here on down, we have a locked vnode that must be unlocked.
  278          */
  279         locked++;
  280 
  281         /* Writable? */
  282         if (vp->v_writecount) {
  283                 error = ETXTBSY;
  284                 goto cleanup;
  285         }
  286 
  287         /* Executable? */
  288         error = VOP_GETATTR(vp, &attr, td->td_ucred, td);
  289         if (error)
  290                 goto cleanup;
  291 
  292         if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
  293             ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
  294                 /* EACCESS is what exec(2) returns. */
  295                 error = ENOEXEC;
  296                 goto cleanup;
  297         }
  298 
  299         /* Sensible size? */
  300         if (attr.va_size == 0) {
  301                 error = ENOEXEC;
  302                 goto cleanup;
  303         }
  304 
  305         /* Can we access it? */
  306         error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
  307         if (error)
  308                 goto cleanup;
  309 
  310         /*
  311          * XXX: This should use vn_open() so that it is properly authorized,
  312          * and to reduce code redundancy all over the place here.
  313          */
  314 #ifdef MAC
  315         error = mac_check_vnode_open(td->td_ucred, vp, FREAD);
  316         if (error)
  317                 goto cleanup;
  318 #endif
  319         error = VOP_OPEN(vp, FREAD, td->td_ucred, td, -1);
  320         if (error)
  321                 goto cleanup;
  322 
  323         /* Pull in executable header into kernel_map */
  324         error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
  325             VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
  326         /*
  327          * Lock no longer needed
  328          */
  329         locked = 0;
  330         VOP_UNLOCK(vp, 0, td);
  331 
  332         if (error)
  333                 goto cleanup;
  334 
  335         /* Is it a Linux binary ? */
  336         if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
  337                 error = ENOEXEC;
  338                 goto cleanup;
  339         }
  340 
  341         /*
  342          * While we are here, we should REALLY do some more checks
  343          */
  344 
  345         /* Set file/virtual offset based on a.out variant. */
  346         switch ((int)(a_out->a_magic & 0xffff)) {
  347         case 0413:                      /* ZMAGIC */
  348                 file_offset = 1024;
  349                 break;
  350         case 0314:                      /* QMAGIC */
  351                 file_offset = 0;
  352                 break;
  353         default:
  354                 error = ENOEXEC;
  355                 goto cleanup;
  356         }
  357 
  358         bss_size = round_page(a_out->a_bss);
  359 
  360         /* Check various fields in header for validity/bounds. */
  361         if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
  362                 error = ENOEXEC;
  363                 goto cleanup;
  364         }
  365 
  366         /* text + data can't exceed file size */
  367         if (a_out->a_data + a_out->a_text > attr.va_size) {
  368                 error = EFAULT;
  369                 goto cleanup;
  370         }
  371 
  372         /*
  373          * text/data/bss must not exceed limits
  374          * XXX - this is not complete. it should check current usage PLUS
  375          * the resources needed by this library.
  376          */
  377         PROC_LOCK(td->td_proc);
  378         if (a_out->a_text > maxtsiz ||
  379             a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA)) {
  380                 PROC_UNLOCK(td->td_proc);
  381                 error = ENOMEM;
  382                 goto cleanup;
  383         }
  384         PROC_UNLOCK(td->td_proc);
  385 
  386         mp_fixme("Unlocked vflags access.");
  387         /* prevent more writers */
  388         vp->v_vflag |= VV_TEXT;
  389 
  390         /*
  391          * Check if file_offset page aligned. Currently we cannot handle
  392          * misalinged file offsets, and so we read in the entire image
  393          * (what a waste).
  394          */
  395         if (file_offset & PAGE_MASK) {
  396 #ifdef DEBUG
  397                 printf("uselib: Non page aligned binary %lu\n", file_offset);
  398 #endif
  399                 /* Map text+data read/write/execute */
  400 
  401                 /* a_entry is the load address and is page aligned */
  402                 vmaddr = trunc_page(a_out->a_entry);
  403 
  404                 /* get anon user mapping, read+write+execute */
  405                 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
  406                     &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL,
  407                     VM_PROT_ALL, 0);
  408                 if (error)
  409                         goto cleanup;
  410 
  411                 /* map file into kernel_map */
  412                 error = vm_mmap(kernel_map, &buffer,
  413                     round_page(a_out->a_text + a_out->a_data + file_offset),
  414                     VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp,
  415                     trunc_page(file_offset));
  416                 if (error)
  417                         goto cleanup;
  418 
  419                 /* copy from kernel VM space to user space */
  420                 error = copyout(PTRIN(buffer + file_offset),
  421                     (void *)vmaddr, a_out->a_text + a_out->a_data);
  422 
  423                 /* release temporary kernel space */
  424                 vm_map_remove(kernel_map, buffer, buffer +
  425                     round_page(a_out->a_text + a_out->a_data + file_offset));
  426 
  427                 if (error)
  428                         goto cleanup;
  429         } else {
  430 #ifdef DEBUG
  431                 printf("uselib: Page aligned binary %lu\n", file_offset);
  432 #endif
  433                 /*
  434                  * for QMAGIC, a_entry is 20 bytes beyond the load address
  435                  * to skip the executable header
  436                  */
  437                 vmaddr = trunc_page(a_out->a_entry);
  438 
  439                 /*
  440                  * Map it all into the process's space as a single
  441                  * copy-on-write "data" segment.
  442                  */
  443                 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr,
  444                     a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
  445                     MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset);
  446                 if (error)
  447                         goto cleanup;
  448         }
  449 #ifdef DEBUG
  450         printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0],
  451             ((long *)vmaddr)[1]);
  452 #endif
  453         if (bss_size != 0) {
  454                 /* Calculate BSS start address */
  455                 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
  456                     a_out->a_data;
  457 
  458                 /* allocate some 'anon' space */
  459                 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
  460                     &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
  461                 if (error)
  462                         goto cleanup;
  463         }
  464 
  465 cleanup:
  466         /* Unlock vnode if needed */
  467         if (locked)
  468                 VOP_UNLOCK(vp, 0, td);
  469 
  470         /* Release the kernel mapping. */
  471         if (a_out)
  472                 vm_map_remove(kernel_map, (vm_offset_t)a_out,
  473                     (vm_offset_t)a_out + PAGE_SIZE);
  474 
  475         return error;
  476 }
  477 
  478 #endif  /* __i386__ || __alpha__ */
  479 
  480 int
  481 linux_select(struct thread *td, struct linux_select_args *args)
  482 {
  483         l_timeval ltv;
  484         struct timeval tv0, tv1, utv, *tvp;
  485         int error;
  486 
  487 #ifdef DEBUG
  488         if (ldebug(select))
  489                 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
  490                     (void *)args->readfds, (void *)args->writefds,
  491                     (void *)args->exceptfds, (void *)args->timeout);
  492 #endif
  493 
  494         /*
  495          * Store current time for computation of the amount of
  496          * time left.
  497          */
  498         if (args->timeout) {
  499                 if ((error = copyin(args->timeout, &ltv, sizeof(ltv))))
  500                         goto select_out;
  501                 utv.tv_sec = ltv.tv_sec;
  502                 utv.tv_usec = ltv.tv_usec;
  503 #ifdef DEBUG
  504                 if (ldebug(select))
  505                         printf(LMSG("incoming timeout (%jd/%ld)"),
  506                             (intmax_t)utv.tv_sec, utv.tv_usec);
  507 #endif
  508 
  509                 if (itimerfix(&utv)) {
  510                         /*
  511                          * The timeval was invalid.  Convert it to something
  512                          * valid that will act as it does under Linux.
  513                          */
  514                         utv.tv_sec += utv.tv_usec / 1000000;
  515                         utv.tv_usec %= 1000000;
  516                         if (utv.tv_usec < 0) {
  517                                 utv.tv_sec -= 1;
  518                                 utv.tv_usec += 1000000;
  519                         }
  520                         if (utv.tv_sec < 0)
  521                                 timevalclear(&utv);
  522                 }
  523                 microtime(&tv0);
  524                 tvp = &utv;
  525         } else
  526                 tvp = NULL;
  527 
  528         error = kern_select(td, args->nfds, args->readfds, args->writefds,
  529             args->exceptfds, tvp);
  530 
  531 #ifdef DEBUG
  532         if (ldebug(select))
  533                 printf(LMSG("real select returns %d"), error);
  534 #endif
  535         if (error) {
  536                 /*
  537                  * See fs/select.c in the Linux kernel.  Without this,
  538                  * Maelstrom doesn't work.
  539                  */
  540                 if (error == ERESTART)
  541                         error = EINTR;
  542                 goto select_out;
  543         }
  544 
  545         if (args->timeout) {
  546                 if (td->td_retval[0]) {
  547                         /*
  548                          * Compute how much time was left of the timeout,
  549                          * by subtracting the current time and the time
  550                          * before we started the call, and subtracting
  551                          * that result from the user-supplied value.
  552                          */
  553                         microtime(&tv1);
  554                         timevalsub(&tv1, &tv0);
  555                         timevalsub(&utv, &tv1);
  556                         if (utv.tv_sec < 0)
  557                                 timevalclear(&utv);
  558                 } else
  559                         timevalclear(&utv);
  560 #ifdef DEBUG
  561                 if (ldebug(select))
  562                         printf(LMSG("outgoing timeout (%jd/%ld)"),
  563                             (intmax_t)utv.tv_sec, utv.tv_usec);
  564 #endif
  565                 ltv.tv_sec = utv.tv_sec;
  566                 ltv.tv_usec = utv.tv_usec;
  567                 if ((error = copyout(&ltv, args->timeout, sizeof(ltv))))
  568                         goto select_out;
  569         }
  570 
  571 select_out:
  572 #ifdef DEBUG
  573         if (ldebug(select))
  574                 printf(LMSG("select_out -> %d"), error);
  575 #endif
  576         return error;
  577 }
  578 
  579 int
  580 linux_mremap(struct thread *td, struct linux_mremap_args *args)
  581 {
  582         struct munmap_args /* {
  583                 void *addr;
  584                 size_t len;
  585         } */ bsd_args;
  586         int error = 0;
  587 
  588 #ifdef DEBUG
  589         if (ldebug(mremap))
  590                 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
  591                     (void *)(uintptr_t)args->addr,
  592                     (unsigned long)args->old_len,
  593                     (unsigned long)args->new_len,
  594                     (unsigned long)args->flags);
  595 #endif
  596         args->new_len = round_page(args->new_len);
  597         args->old_len = round_page(args->old_len);
  598 
  599         if (args->new_len > args->old_len) {
  600                 td->td_retval[0] = 0;
  601                 return ENOMEM;
  602         }
  603 
  604         if (args->new_len < args->old_len) {
  605                 bsd_args.addr =
  606                     (caddr_t)((uintptr_t)args->addr + args->new_len);
  607                 bsd_args.len = args->old_len - args->new_len;
  608                 error = munmap(td, &bsd_args);
  609         }
  610 
  611         td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
  612         return error;
  613 }
  614 
  615 #define LINUX_MS_ASYNC       0x0001
  616 #define LINUX_MS_INVALIDATE  0x0002
  617 #define LINUX_MS_SYNC        0x0004
  618 
  619 int
  620 linux_msync(struct thread *td, struct linux_msync_args *args)
  621 {
  622         struct msync_args bsd_args;
  623 
  624         bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
  625         bsd_args.len = (uintptr_t)args->len;
  626         bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
  627 
  628         return msync(td, &bsd_args);
  629 }
  630 
  631 #ifndef __alpha__
  632 int
  633 linux_time(struct thread *td, struct linux_time_args *args)
  634 {
  635         struct timeval tv;
  636         l_time_t tm;
  637         int error;
  638 
  639 #ifdef DEBUG
  640         if (ldebug(time))
  641                 printf(ARGS(time, "*"));
  642 #endif
  643 
  644         microtime(&tv);
  645         tm = tv.tv_sec;
  646         if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
  647                 return error;
  648         td->td_retval[0] = tm;
  649         return 0;
  650 }
  651 #endif  /*!__alpha__*/
  652 
  653 struct l_times_argv {
  654         l_long          tms_utime;
  655         l_long          tms_stime;
  656         l_long          tms_cutime;
  657         l_long          tms_cstime;
  658 };
  659 
  660 #ifdef __alpha__
  661 #define CLK_TCK 1024    /* Linux uses 1024 on alpha */
  662 #else
  663 #define CLK_TCK 100     /* Linux uses 100 */
  664 #endif
  665 
  666 #define CONVTCK(r)      (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
  667 
  668 int
  669 linux_times(struct thread *td, struct linux_times_args *args)
  670 {
  671         struct timeval tv, utime, stime, cutime, cstime;
  672         struct l_times_argv tms;
  673         struct proc *p;
  674         int error;
  675 
  676 #ifdef DEBUG
  677         if (ldebug(times))
  678                 printf(ARGS(times, "*"));
  679 #endif
  680 
  681         if (args->buf != NULL) {
  682                 p = td->td_proc;
  683                 PROC_LOCK(p);
  684                 calcru(p, &utime, &stime);
  685                 calccru(p, &cutime, &cstime);
  686                 PROC_UNLOCK(p);
  687 
  688                 tms.tms_utime = CONVTCK(utime);
  689                 tms.tms_stime = CONVTCK(stime);
  690 
  691                 tms.tms_cutime = CONVTCK(cutime);
  692                 tms.tms_cstime = CONVTCK(cstime);
  693 
  694                 if ((error = copyout(&tms, args->buf, sizeof(tms))))
  695                         return error;
  696         }
  697 
  698         microuptime(&tv);
  699         td->td_retval[0] = (int)CONVTCK(tv);
  700         return 0;
  701 }
  702 
  703 int
  704 linux_newuname(struct thread *td, struct linux_newuname_args *args)
  705 {
  706         struct l_new_utsname utsname;
  707         char osname[LINUX_MAX_UTSNAME];
  708         char osrelease[LINUX_MAX_UTSNAME];
  709         char *p;
  710 
  711 #ifdef DEBUG
  712         if (ldebug(newuname))
  713                 printf(ARGS(newuname, "*"));
  714 #endif
  715 
  716         linux_get_osname(td, osname);
  717         linux_get_osrelease(td, osrelease);
  718 
  719         bzero(&utsname, sizeof(utsname));
  720         strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
  721         getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
  722         strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
  723         strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
  724         for (p = utsname.version; *p != '\0'; ++p)
  725                 if (*p == '\n') {
  726                         *p = '\0';
  727                         break;
  728                 }
  729 #ifdef __i386__
  730         {
  731                 const char *class;
  732 
  733                 switch (cpu_class) {
  734                 case CPUCLASS_686:
  735                         class = "i686";
  736                         break;
  737                 case CPUCLASS_586:
  738                         class = "i586";
  739                         break;
  740                 case CPUCLASS_486:
  741                         class = "i486";
  742                         break;
  743                 default:
  744                         class = "i386";
  745                 }
  746                 strlcpy(utsname.machine, class, LINUX_MAX_UTSNAME);
  747         }
  748 #elif defined(__amd64__)        /* XXX: Linux can change 'personality'. */
  749 #ifdef COMPAT_LINUX32
  750         strlcpy(utsname.machine, "i686", LINUX_MAX_UTSNAME);
  751 #else
  752         strlcpy(utsname.machine, "x86_64", LINUX_MAX_UTSNAME);
  753 #endif /* COMPAT_LINUX32 */
  754 #else /* something other than i386 or amd64 - assume we and Linux agree */
  755         strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME);
  756 #endif /* __i386__ */
  757         strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME);
  758 
  759         return (copyout(&utsname, args->buf, sizeof(utsname)));
  760 }
  761 
  762 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  763 struct l_utimbuf {
  764         l_time_t l_actime;
  765         l_time_t l_modtime;
  766 };
  767 
  768 int
  769 linux_utime(struct thread *td, struct linux_utime_args *args)
  770 {
  771         struct timeval tv[2], *tvp;
  772         struct l_utimbuf lut;
  773         char *fname;
  774         int error;
  775 
  776         LCONVPATHEXIST(td, args->fname, &fname);
  777 
  778 #ifdef DEBUG
  779         if (ldebug(utime))
  780                 printf(ARGS(utime, "%s, *"), fname);
  781 #endif
  782 
  783         if (args->times) {
  784                 if ((error = copyin(args->times, &lut, sizeof lut))) {
  785                         LFREEPATH(fname);
  786                         return error;
  787                 }
  788                 tv[0].tv_sec = lut.l_actime;
  789                 tv[0].tv_usec = 0;
  790                 tv[1].tv_sec = lut.l_modtime;
  791                 tv[1].tv_usec = 0;
  792                 tvp = tv;
  793         } else
  794                 tvp = NULL;
  795 
  796         error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
  797         LFREEPATH(fname);
  798         return (error);
  799 }
  800 
  801 int
  802 linux_utimes(struct thread *td, struct linux_utimes_args *args)
  803 {
  804         l_timeval ltv[2];
  805         struct timeval tv[2], *tvp = NULL;
  806         char *fname;
  807         int error;
  808 
  809         LCONVPATHEXIST(td, args->fname, &fname);
  810 
  811 #ifdef DEBUG
  812         if (ldebug(utimes))
  813                 printf(ARGS(utimes, "%s, *"), fname);
  814 #endif
  815 
  816         if (args->tptr != NULL) {
  817                 if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
  818                         LFREEPATH(fname);
  819                         return (error);
  820                 }
  821                 tv[0].tv_sec = ltv[0].tv_sec;
  822                 tv[0].tv_usec = ltv[0].tv_usec;
  823                 tv[1].tv_sec = ltv[1].tv_sec;
  824                 tv[1].tv_usec = ltv[1].tv_usec;
  825                 tvp = tv;
  826         }
  827 
  828         error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
  829         LFREEPATH(fname);
  830         return (error);
  831 }
  832 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
  833 
  834 #define __WCLONE 0x80000000
  835 
  836 #ifndef __alpha__
  837 int
  838 linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
  839 {
  840         int error, options, tmpstat;
  841 
  842 #ifdef DEBUG
  843         if (ldebug(waitpid))
  844                 printf(ARGS(waitpid, "%d, %p, %d"),
  845                     args->pid, (void *)args->status, args->options);
  846 #endif
  847         /*
  848          * this is necessary because the test in kern_wait doesn't work
  849          * because we mess with the options here
  850          */
  851         if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
  852                 return (EINVAL);
  853 
  854         options = (args->options & (WNOHANG | WUNTRACED));
  855         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
  856         if (args->options & __WCLONE)
  857                 options |= WLINUXCLONE;
  858 
  859         error = kern_wait(td, args->pid, &tmpstat, options, NULL);
  860         if (error)
  861                 return error;
  862 
  863         if (args->status) {
  864                 tmpstat &= 0xffff;
  865                 if (WIFSIGNALED(tmpstat))
  866                         tmpstat = (tmpstat & 0xffffff80) |
  867                             BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
  868                 else if (WIFSTOPPED(tmpstat))
  869                         tmpstat = (tmpstat & 0xffff00ff) |
  870                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
  871                 return copyout(&tmpstat, args->status, sizeof(int));
  872         }
  873 
  874         return 0;
  875 }
  876 #endif  /*!__alpha__*/
  877 
  878 int
  879 linux_wait4(struct thread *td, struct linux_wait4_args *args)
  880 {
  881         int error, options, tmpstat;
  882         struct rusage ru, *rup;
  883         struct proc *p;
  884 
  885 #ifdef DEBUG
  886         if (ldebug(wait4))
  887                 printf(ARGS(wait4, "%d, %p, %d, %p"),
  888                     args->pid, (void *)args->status, args->options,
  889                     (void *)args->rusage);
  890 #endif
  891 
  892         options = (args->options & (WNOHANG | WUNTRACED));
  893         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
  894         if (args->options & __WCLONE)
  895                 options |= WLINUXCLONE;
  896 
  897         if (args->rusage != NULL)
  898                 rup = &ru;
  899         else
  900                 rup = NULL;
  901         error = kern_wait(td, args->pid, &tmpstat, options, rup);
  902         if (error)
  903                 return error;
  904 
  905         p = td->td_proc;
  906         PROC_LOCK(p);
  907         SIGDELSET(p->p_siglist, SIGCHLD);
  908         PROC_UNLOCK(p);
  909 
  910         if (args->status) {
  911                 tmpstat &= 0xffff;
  912                 if (WIFSIGNALED(tmpstat))
  913                         tmpstat = (tmpstat & 0xffffff80) |
  914                             BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
  915                 else if (WIFSTOPPED(tmpstat))
  916                         tmpstat = (tmpstat & 0xffff00ff) |
  917                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
  918                 error = copyout(&tmpstat, args->status, sizeof(int));
  919         }
  920         if (args->rusage != NULL && error == 0)
  921                 error = copyout(&ru, args->rusage, sizeof(ru));
  922 
  923         return (error);
  924 }
  925 
  926 int
  927 linux_mknod(struct thread *td, struct linux_mknod_args *args)
  928 {
  929         char *path;
  930         int error;
  931 
  932         LCONVPATHCREAT(td, args->path, &path);
  933 
  934 #ifdef DEBUG
  935         if (ldebug(mknod))
  936                 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev);
  937 #endif
  938 
  939         switch (args->mode & S_IFMT) {
  940         case S_IFIFO:
  941         case S_IFSOCK:
  942                 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode);
  943                 break;
  944 
  945         case S_IFCHR:
  946         case S_IFBLK:
  947                 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode,
  948                     args->dev);
  949                 break;
  950 
  951         case S_IFDIR:
  952                 error = EPERM;
  953                 break;
  954 
  955         case 0:
  956                 args->mode |= S_IFREG;
  957                 /* FALLTHROUGH */
  958         case S_IFREG:
  959                 error = kern_open(td, path, UIO_SYSSPACE,
  960                     O_WRONLY | O_CREAT | O_TRUNC, args->mode);
  961                 break;
  962 
  963         default:
  964                 error = EINVAL;
  965                 break;
  966         }
  967         LFREEPATH(path);
  968         return (error);
  969 }
  970 
  971 /*
  972  * UGH! This is just about the dumbest idea I've ever heard!!
  973  */
  974 int
  975 linux_personality(struct thread *td, struct linux_personality_args *args)
  976 {
  977 #ifdef DEBUG
  978         if (ldebug(personality))
  979                 printf(ARGS(personality, "%lu"), (unsigned long)args->per);
  980 #endif
  981 #ifndef __alpha__
  982         if (args->per != 0)
  983                 return EINVAL;
  984 #endif
  985 
  986         /* Yes Jim, it's still a Linux... */
  987         td->td_retval[0] = 0;
  988         return 0;
  989 }
  990 
  991 struct l_itimerval {
  992         l_timeval it_interval;
  993         l_timeval it_value;
  994 };
  995 
  996 #define B2L_ITIMERVAL(bip, lip)                                         \
  997         (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec;          \
  998         (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec;        \
  999         (bip)->it_value.tv_sec = (lip)->it_value.tv_sec;                \
 1000         (bip)->it_value.tv_usec = (lip)->it_value.tv_usec;
 1001 
 1002 int
 1003 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap)
 1004 {
 1005         int error;
 1006         struct l_itimerval ls;
 1007         struct itimerval aitv, oitv;
 1008 
 1009 #ifdef DEBUG
 1010         if (ldebug(setitimer))
 1011                 printf(ARGS(setitimer, "%p, %p"),
 1012                     (void *)uap->itv, (void *)uap->oitv);
 1013 #endif
 1014 
 1015         if (uap->itv == NULL) {
 1016                 uap->itv = uap->oitv;
 1017                 return (linux_getitimer(td, (struct linux_getitimer_args *)uap));
 1018         }
 1019 
 1020         error = copyin(uap->itv, &ls, sizeof(ls));
 1021         if (error != 0)
 1022                 return (error);
 1023         B2L_ITIMERVAL(&aitv, &ls);
 1024 #ifdef DEBUG
 1025         if (ldebug(setitimer)) {
 1026                 printf("setitimer: value: sec: %jd, usec: %ld\n",
 1027                     (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec);
 1028                 printf("setitimer: interval: sec: %jd, usec: %ld\n",
 1029                     (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec);
 1030         }
 1031 #endif
 1032         error = kern_setitimer(td, uap->which, &aitv, &oitv);
 1033         if (error != 0 || uap->oitv == NULL)
 1034                 return (error);
 1035         B2L_ITIMERVAL(&ls, &oitv);
 1036 
 1037         return (copyout(&ls, uap->oitv, sizeof(ls)));
 1038 }
 1039 
 1040 int
 1041 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap)
 1042 {
 1043         int error;
 1044         struct l_itimerval ls;
 1045         struct itimerval aitv;
 1046 
 1047 #ifdef DEBUG
 1048         if (ldebug(getitimer))
 1049                 printf(ARGS(getitimer, "%p"), (void *)uap->itv);
 1050 #endif
 1051         error = kern_getitimer(td, uap->which, &aitv);
 1052         if (error != 0)
 1053                 return (error);
 1054         B2L_ITIMERVAL(&ls, &aitv);
 1055         return (copyout(&ls, uap->itv, sizeof(ls)));
 1056 }
 1057 
 1058 #ifndef __alpha__
 1059 int
 1060 linux_nice(struct thread *td, struct linux_nice_args *args)
 1061 {
 1062         struct setpriority_args bsd_args;
 1063 
 1064         bsd_args.which = PRIO_PROCESS;
 1065         bsd_args.who = 0;       /* current process */
 1066         bsd_args.prio = args->inc;
 1067         return setpriority(td, &bsd_args);
 1068 }
 1069 #endif  /*!__alpha__*/
 1070 
 1071 int
 1072 linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
 1073 {
 1074         struct ucred *newcred, *oldcred;
 1075         l_gid_t linux_gidset[NGROUPS];
 1076         gid_t *bsd_gidset;
 1077         int ngrp, error;
 1078         struct proc *p;
 1079 
 1080         ngrp = args->gidsetsize;
 1081         if (ngrp < 0 || ngrp >= NGROUPS)
 1082                 return (EINVAL);
 1083         error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
 1084         if (error)
 1085                 return (error);
 1086         newcred = crget();
 1087         p = td->td_proc;
 1088         PROC_LOCK(p);
 1089         oldcred = p->p_ucred;
 1090 
 1091         /*
 1092          * cr_groups[0] holds egid. Setting the whole set from
 1093          * the supplied set will cause egid to be changed too.
 1094          * Keep cr_groups[0] unchanged to prevent that.
 1095          */
 1096 
 1097         if ((error = suser_cred(oldcred, SUSER_ALLOWJAIL)) != 0) {
 1098                 PROC_UNLOCK(p);
 1099                 crfree(newcred);
 1100                 return (error);
 1101         }
 1102 
 1103         crcopy(newcred, oldcred);
 1104         if (ngrp > 0) {
 1105                 newcred->cr_ngroups = ngrp + 1;
 1106 
 1107                 bsd_gidset = newcred->cr_groups;
 1108                 ngrp--;
 1109                 while (ngrp >= 0) {
 1110                         bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
 1111                         ngrp--;
 1112                 }
 1113         } else
 1114                 newcred->cr_ngroups = 1;
 1115 
 1116         setsugid(p);
 1117         p->p_ucred = newcred;
 1118         PROC_UNLOCK(p);
 1119         crfree(oldcred);
 1120         return (0);
 1121 }
 1122 
 1123 int
 1124 linux_getgroups(struct thread *td, struct linux_getgroups_args *args)
 1125 {
 1126         struct ucred *cred;
 1127         l_gid_t linux_gidset[NGROUPS];
 1128         gid_t *bsd_gidset;
 1129         int bsd_gidsetsz, ngrp, error;
 1130 
 1131         cred = td->td_ucred;
 1132         bsd_gidset = cred->cr_groups;
 1133         bsd_gidsetsz = cred->cr_ngroups - 1;
 1134 
 1135         /*
 1136          * cr_groups[0] holds egid. Returning the whole set
 1137          * here will cause a duplicate. Exclude cr_groups[0]
 1138          * to prevent that.
 1139          */
 1140 
 1141         if ((ngrp = args->gidsetsize) == 0) {
 1142                 td->td_retval[0] = bsd_gidsetsz;
 1143                 return (0);
 1144         }
 1145 
 1146         if (ngrp < bsd_gidsetsz)
 1147                 return (EINVAL);
 1148 
 1149         ngrp = 0;
 1150         while (ngrp < bsd_gidsetsz) {
 1151                 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
 1152                 ngrp++;
 1153         }
 1154 
 1155         if ((error = copyout(linux_gidset, args->grouplist,
 1156             ngrp * sizeof(l_gid_t))))
 1157                 return (error);
 1158 
 1159         td->td_retval[0] = ngrp;
 1160         return (0);
 1161 }
 1162 
 1163 #ifndef __alpha__
 1164 int
 1165 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args)
 1166 {
 1167         struct rlimit bsd_rlim;
 1168         struct l_rlimit rlim;
 1169         u_int which;
 1170         int error;
 1171 
 1172 #ifdef DEBUG
 1173         if (ldebug(setrlimit))
 1174                 printf(ARGS(setrlimit, "%d, %p"),
 1175                     args->resource, (void *)args->rlim);
 1176 #endif
 1177 
 1178         if (args->resource >= LINUX_RLIM_NLIMITS)
 1179                 return (EINVAL);
 1180 
 1181         which = linux_to_bsd_resource[args->resource];
 1182         if (which == -1)
 1183                 return (EINVAL);
 1184 
 1185         error = copyin(args->rlim, &rlim, sizeof(rlim));
 1186         if (error)
 1187                 return (error);
 1188 
 1189         bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur;
 1190         bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max;
 1191         return (kern_setrlimit(td, which, &bsd_rlim));
 1192 }
 1193 
 1194 int
 1195 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
 1196 {
 1197         struct l_rlimit rlim;
 1198         struct proc *p = td->td_proc;
 1199         struct rlimit bsd_rlim;
 1200         u_int which;
 1201 
 1202 #ifdef DEBUG
 1203         if (ldebug(old_getrlimit))
 1204                 printf(ARGS(old_getrlimit, "%d, %p"),
 1205                     args->resource, (void *)args->rlim);
 1206 #endif
 1207 
 1208         if (args->resource >= LINUX_RLIM_NLIMITS)
 1209                 return (EINVAL);
 1210 
 1211         which = linux_to_bsd_resource[args->resource];
 1212         if (which == -1)
 1213                 return (EINVAL);
 1214 
 1215         PROC_LOCK(p);
 1216         lim_rlimit(p, which, &bsd_rlim);
 1217         PROC_UNLOCK(p);
 1218 
 1219 #ifdef COMPAT_LINUX32
 1220         rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur;
 1221         if (rlim.rlim_cur == UINT_MAX)
 1222                 rlim.rlim_cur = INT_MAX;
 1223         rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max;
 1224         if (rlim.rlim_max == UINT_MAX)
 1225                 rlim.rlim_max = INT_MAX;
 1226 #else
 1227         rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur;
 1228         if (rlim.rlim_cur == ULONG_MAX)
 1229                 rlim.rlim_cur = LONG_MAX;
 1230         rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max;
 1231         if (rlim.rlim_max == ULONG_MAX)
 1232                 rlim.rlim_max = LONG_MAX;
 1233 #endif
 1234         return (copyout(&rlim, args->rlim, sizeof(rlim)));
 1235 }
 1236 
 1237 int
 1238 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
 1239 {
 1240         struct l_rlimit rlim;
 1241         struct proc *p = td->td_proc;
 1242         struct rlimit bsd_rlim;
 1243         u_int which;
 1244 
 1245 #ifdef DEBUG
 1246         if (ldebug(getrlimit))
 1247                 printf(ARGS(getrlimit, "%d, %p"),
 1248                     args->resource, (void *)args->rlim);
 1249 #endif
 1250 
 1251         if (args->resource >= LINUX_RLIM_NLIMITS)
 1252                 return (EINVAL);
 1253 
 1254         which = linux_to_bsd_resource[args->resource];
 1255         if (which == -1)
 1256                 return (EINVAL);
 1257 
 1258         PROC_LOCK(p);
 1259         lim_rlimit(p, which, &bsd_rlim);
 1260         PROC_UNLOCK(p);
 1261 
 1262         rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur;
 1263         rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max;
 1264         return (copyout(&rlim, args->rlim, sizeof(rlim)));
 1265 }
 1266 #endif /*!__alpha__*/
 1267 
 1268 int
 1269 linux_sched_setscheduler(struct thread *td,
 1270     struct linux_sched_setscheduler_args *args)
 1271 {
 1272         struct sched_setscheduler_args bsd;
 1273 
 1274 #ifdef DEBUG
 1275         if (ldebug(sched_setscheduler))
 1276                 printf(ARGS(sched_setscheduler, "%d, %d, %p"),
 1277                     args->pid, args->policy, (const void *)args->param);
 1278 #endif
 1279 
 1280         switch (args->policy) {
 1281         case LINUX_SCHED_OTHER:
 1282                 bsd.policy = SCHED_OTHER;
 1283                 break;
 1284         case LINUX_SCHED_FIFO:
 1285                 bsd.policy = SCHED_FIFO;
 1286                 break;
 1287         case LINUX_SCHED_RR:
 1288                 bsd.policy = SCHED_RR;
 1289                 break;
 1290         default:
 1291                 return EINVAL;
 1292         }
 1293 
 1294         bsd.pid = args->pid;
 1295         bsd.param = (struct sched_param *)args->param;
 1296         return sched_setscheduler(td, &bsd);
 1297 }
 1298 
 1299 int
 1300 linux_sched_getscheduler(struct thread *td,
 1301     struct linux_sched_getscheduler_args *args)
 1302 {
 1303         struct sched_getscheduler_args bsd;
 1304         int error;
 1305 
 1306 #ifdef DEBUG
 1307         if (ldebug(sched_getscheduler))
 1308                 printf(ARGS(sched_getscheduler, "%d"), args->pid);
 1309 #endif
 1310 
 1311         bsd.pid = args->pid;
 1312         error = sched_getscheduler(td, &bsd);
 1313 
 1314         switch (td->td_retval[0]) {
 1315         case SCHED_OTHER:
 1316                 td->td_retval[0] = LINUX_SCHED_OTHER;
 1317                 break;
 1318         case SCHED_FIFO:
 1319                 td->td_retval[0] = LINUX_SCHED_FIFO;
 1320                 break;
 1321         case SCHED_RR:
 1322                 td->td_retval[0] = LINUX_SCHED_RR;
 1323                 break;
 1324         }
 1325 
 1326         return error;
 1327 }
 1328 
 1329 int
 1330 linux_sched_get_priority_max(struct thread *td,
 1331     struct linux_sched_get_priority_max_args *args)
 1332 {
 1333         struct sched_get_priority_max_args bsd;
 1334 
 1335 #ifdef DEBUG
 1336         if (ldebug(sched_get_priority_max))
 1337                 printf(ARGS(sched_get_priority_max, "%d"), args->policy);
 1338 #endif
 1339 
 1340         switch (args->policy) {
 1341         case LINUX_SCHED_OTHER:
 1342                 bsd.policy = SCHED_OTHER;
 1343                 break;
 1344         case LINUX_SCHED_FIFO:
 1345                 bsd.policy = SCHED_FIFO;
 1346                 break;
 1347         case LINUX_SCHED_RR:
 1348                 bsd.policy = SCHED_RR;
 1349                 break;
 1350         default:
 1351                 return EINVAL;
 1352         }
 1353         return sched_get_priority_max(td, &bsd);
 1354 }
 1355 
 1356 int
 1357 linux_sched_get_priority_min(struct thread *td,
 1358     struct linux_sched_get_priority_min_args *args)
 1359 {
 1360         struct sched_get_priority_min_args bsd;
 1361 
 1362 #ifdef DEBUG
 1363         if (ldebug(sched_get_priority_min))
 1364                 printf(ARGS(sched_get_priority_min, "%d"), args->policy);
 1365 #endif
 1366 
 1367         switch (args->policy) {
 1368         case LINUX_SCHED_OTHER:
 1369                 bsd.policy = SCHED_OTHER;
 1370                 break;
 1371         case LINUX_SCHED_FIFO:
 1372                 bsd.policy = SCHED_FIFO;
 1373                 break;
 1374         case LINUX_SCHED_RR:
 1375                 bsd.policy = SCHED_RR;
 1376                 break;
 1377         default:
 1378                 return EINVAL;
 1379         }
 1380         return sched_get_priority_min(td, &bsd);
 1381 }
 1382 
 1383 #define REBOOT_CAD_ON   0x89abcdef
 1384 #define REBOOT_CAD_OFF  0
 1385 #define REBOOT_HALT     0xcdef0123
 1386 #define REBOOT_RESTART  0x01234567
 1387 #define REBOOT_RESTART2 0xA1B2C3D4
 1388 #define REBOOT_POWEROFF 0x4321FEDC
 1389 #define REBOOT_MAGIC1   0xfee1dead
 1390 #define REBOOT_MAGIC2   0x28121969
 1391 #define REBOOT_MAGIC2A  0x05121996
 1392 #define REBOOT_MAGIC2B  0x16041998
 1393 
 1394 int
 1395 linux_reboot(struct thread *td, struct linux_reboot_args *args)
 1396 {
 1397         struct reboot_args bsd_args;
 1398 
 1399 #ifdef DEBUG
 1400         if (ldebug(reboot))
 1401                 printf(ARGS(reboot, "0x%x"), args->cmd);
 1402 #endif
 1403 
 1404         if (args->magic1 != REBOOT_MAGIC1)
 1405                 return EINVAL;
 1406 
 1407         switch (args->magic2) {
 1408         case REBOOT_MAGIC2:
 1409         case REBOOT_MAGIC2A:
 1410         case REBOOT_MAGIC2B:
 1411                 break;
 1412         default:
 1413                 return EINVAL;
 1414         }
 1415 
 1416         switch (args->cmd) {
 1417         case REBOOT_CAD_ON:
 1418         case REBOOT_CAD_OFF:
 1419                 return suser(td);
 1420         case REBOOT_HALT:
 1421                 bsd_args.opt = RB_HALT;
 1422                 break;
 1423         case REBOOT_RESTART:
 1424         case REBOOT_RESTART2:
 1425                 bsd_args.opt = 0;
 1426                 break;
 1427         case REBOOT_POWEROFF:
 1428                 bsd_args.opt = RB_POWEROFF;
 1429                 break;
 1430         default:
 1431                 return EINVAL;
 1432         }
 1433         return reboot(td, &bsd_args);
 1434 }
 1435 
 1436 #ifndef __alpha__
 1437 
 1438 /*
 1439  * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
 1440  * td->td_retval[1] when COMPAT_43 is defined. This
 1441  * globbers registers that are assumed to be preserved. The following
 1442  * lightweight syscalls fixes this. See also linux_getgid16() and
 1443  * linux_getuid16() in linux_uid16.c.
 1444  *
 1445  * linux_getpid() - MP SAFE
 1446  * linux_getgid() - MP SAFE
 1447  * linux_getuid() - MP SAFE
 1448  */
 1449 
 1450 int
 1451 linux_getpid(struct thread *td, struct linux_getpid_args *args)
 1452 {
 1453 
 1454         td->td_retval[0] = td->td_proc->p_pid;
 1455         return (0);
 1456 }
 1457 
 1458 int
 1459 linux_getgid(struct thread *td, struct linux_getgid_args *args)
 1460 {
 1461 
 1462         td->td_retval[0] = td->td_ucred->cr_rgid;
 1463         return (0);
 1464 }
 1465 
 1466 int
 1467 linux_getuid(struct thread *td, struct linux_getuid_args *args)
 1468 {
 1469 
 1470         td->td_retval[0] = td->td_ucred->cr_ruid;
 1471         return (0);
 1472 }
 1473 
 1474 #endif /*!__alpha__*/
 1475 
 1476 int
 1477 linux_getsid(struct thread *td, struct linux_getsid_args *args)
 1478 {
 1479         struct getsid_args bsd;
 1480         bsd.pid = args->pid;
 1481         return getsid(td, &bsd);
 1482 }
 1483 
 1484 int
 1485 linux_nosys(struct thread *td, struct nosys_args *ignore)
 1486 {
 1487 
 1488         return (ENOSYS);
 1489 }
 1490 
 1491 int
 1492 linux_getpriority(struct thread *td, struct linux_getpriority_args *args)
 1493 {
 1494         struct getpriority_args bsd_args;
 1495         int error;
 1496 
 1497         bsd_args.which = args->which;
 1498         bsd_args.who = args->who;
 1499         error = getpriority(td, &bsd_args);
 1500         td->td_retval[0] = 20 - td->td_retval[0];
 1501         return error;
 1502 }
 1503 
 1504 int
 1505 linux_sethostname(struct thread *td, struct linux_sethostname_args *args)
 1506 {
 1507         int name[2];
 1508 
 1509 #ifdef DEBUG
 1510         if (ldebug(sethostname))
 1511                 printf(ARGS(sethostname, "*, %i"), args->len);
 1512 #endif
 1513 
 1514         name[0] = CTL_KERN;
 1515         name[1] = KERN_HOSTNAME;
 1516         return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname,
 1517             args->len, 0, 0));
 1518 }
 1519 

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