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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/i386/linux/linux_machdep.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2000 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer
   10  *    in this position and unchanged.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/file.h>
   35 #include <sys/fcntl.h>
   36 #include <sys/imgact.h>
   37 #include <sys/lock.h>
   38 #include <sys/malloc.h>
   39 #include <sys/mman.h>
   40 #include <sys/mutex.h>
   41 #include <sys/sx.h>
   42 #include <sys/priv.h>
   43 #include <sys/proc.h>
   44 #include <sys/queue.h>
   45 #include <sys/resource.h>
   46 #include <sys/resourcevar.h>
   47 #include <sys/signalvar.h>
   48 #include <sys/syscallsubr.h>
   49 #include <sys/sysproto.h>
   50 #include <sys/unistd.h>
   51 #include <sys/wait.h>
   52 #include <sys/sched.h>
   53 
   54 #include <machine/frame.h>
   55 #include <machine/psl.h>
   56 #include <machine/segments.h>
   57 #include <machine/sysarch.h>
   58 
   59 #include <vm/vm.h>
   60 #include <vm/pmap.h>
   61 #include <vm/vm_map.h>
   62 
   63 #include <i386/linux/linux.h>
   64 #include <i386/linux/linux_proto.h>
   65 #include <compat/linux/linux_ipc.h>
   66 #include <compat/linux/linux_signal.h>
   67 #include <compat/linux/linux_util.h>
   68 #include <compat/linux/linux_emul.h>
   69 
   70 #include <i386/include/pcb.h>                   /* needed for pcb definition in linux_set_thread_area */
   71 
   72 #include "opt_posix.h"
   73 
   74 extern struct sysentvec elf32_freebsd_sysvec;   /* defined in i386/i386/elf_machdep.c */
   75 
   76 struct l_descriptor {
   77         l_uint          entry_number;
   78         l_ulong         base_addr;
   79         l_uint          limit;
   80         l_uint          seg_32bit:1;
   81         l_uint          contents:2;
   82         l_uint          read_exec_only:1;
   83         l_uint          limit_in_pages:1;
   84         l_uint          seg_not_present:1;
   85         l_uint          useable:1;
   86 };
   87 
   88 struct l_old_select_argv {
   89         l_int           nfds;
   90         l_fd_set        *readfds;
   91         l_fd_set        *writefds;
   92         l_fd_set        *exceptfds;
   93         struct l_timeval        *timeout;
   94 };
   95 
   96 int
   97 linux_to_bsd_sigaltstack(int lsa)
   98 {
   99         int bsa = 0;
  100 
  101         if (lsa & LINUX_SS_DISABLE)
  102                 bsa |= SS_DISABLE;
  103         if (lsa & LINUX_SS_ONSTACK)
  104                 bsa |= SS_ONSTACK;
  105         return (bsa);
  106 }
  107 
  108 int
  109 bsd_to_linux_sigaltstack(int bsa)
  110 {
  111         int lsa = 0;
  112 
  113         if (bsa & SS_DISABLE)
  114                 lsa |= LINUX_SS_DISABLE;
  115         if (bsa & SS_ONSTACK)
  116                 lsa |= LINUX_SS_ONSTACK;
  117         return (lsa);
  118 }
  119 
  120 int
  121 linux_execve(struct thread *td, struct linux_execve_args *args)
  122 {
  123         int error;
  124         char *newpath;
  125         struct image_args eargs;
  126 
  127         LCONVPATHEXIST(td, args->path, &newpath);
  128 
  129 #ifdef DEBUG
  130         if (ldebug(execve))
  131                 printf(ARGS(execve, "%s"), newpath);
  132 #endif
  133 
  134         error = exec_copyin_args(&eargs, newpath, UIO_SYSSPACE,
  135             args->argp, args->envp);
  136         free(newpath, M_TEMP);
  137         if (error == 0)
  138                 error = kern_execve(td, &eargs, NULL);
  139         if (error == 0)
  140                 /* linux process can exec fbsd one, dont attempt
  141                  * to create emuldata for such process using
  142                  * linux_proc_init, this leads to a panic on KASSERT
  143                  * because such process has p->p_emuldata == NULL
  144                  */
  145                 if (td->td_proc->p_sysent == &elf_linux_sysvec)
  146                         error = linux_proc_init(td, 0, 0);
  147         return (error);
  148 }
  149 
  150 struct l_ipc_kludge {
  151         struct l_msgbuf *msgp;
  152         l_long msgtyp;
  153 };
  154 
  155 int
  156 linux_ipc(struct thread *td, struct linux_ipc_args *args)
  157 {
  158 
  159         switch (args->what & 0xFFFF) {
  160         case LINUX_SEMOP: {
  161                 struct linux_semop_args a;
  162 
  163                 a.semid = args->arg1;
  164                 a.tsops = args->ptr;
  165                 a.nsops = args->arg2;
  166                 return (linux_semop(td, &a));
  167         }
  168         case LINUX_SEMGET: {
  169                 struct linux_semget_args a;
  170 
  171                 a.key = args->arg1;
  172                 a.nsems = args->arg2;
  173                 a.semflg = args->arg3;
  174                 return (linux_semget(td, &a));
  175         }
  176         case LINUX_SEMCTL: {
  177                 struct linux_semctl_args a;
  178                 int error;
  179 
  180                 a.semid = args->arg1;
  181                 a.semnum = args->arg2;
  182                 a.cmd = args->arg3;
  183                 error = copyin(args->ptr, &a.arg, sizeof(a.arg));
  184                 if (error)
  185                         return (error);
  186                 return (linux_semctl(td, &a));
  187         }
  188         case LINUX_MSGSND: {
  189                 struct linux_msgsnd_args a;
  190 
  191                 a.msqid = args->arg1;
  192                 a.msgp = args->ptr;
  193                 a.msgsz = args->arg2;
  194                 a.msgflg = args->arg3;
  195                 return (linux_msgsnd(td, &a));
  196         }
  197         case LINUX_MSGRCV: {
  198                 struct linux_msgrcv_args a;
  199 
  200                 a.msqid = args->arg1;
  201                 a.msgsz = args->arg2;
  202                 a.msgflg = args->arg3;
  203                 if ((args->what >> 16) == 0) {
  204                         struct l_ipc_kludge tmp;
  205                         int error;
  206 
  207                         if (args->ptr == NULL)
  208                                 return (EINVAL);
  209                         error = copyin(args->ptr, &tmp, sizeof(tmp));
  210                         if (error)
  211                                 return (error);
  212                         a.msgp = tmp.msgp;
  213                         a.msgtyp = tmp.msgtyp;
  214                 } else {
  215                         a.msgp = args->ptr;
  216                         a.msgtyp = args->arg5;
  217                 }
  218                 return (linux_msgrcv(td, &a));
  219         }
  220         case LINUX_MSGGET: {
  221                 struct linux_msgget_args a;
  222 
  223                 a.key = args->arg1;
  224                 a.msgflg = args->arg2;
  225                 return (linux_msgget(td, &a));
  226         }
  227         case LINUX_MSGCTL: {
  228                 struct linux_msgctl_args a;
  229 
  230                 a.msqid = args->arg1;
  231                 a.cmd = args->arg2;
  232                 a.buf = args->ptr;
  233                 return (linux_msgctl(td, &a));
  234         }
  235         case LINUX_SHMAT: {
  236                 struct linux_shmat_args a;
  237 
  238                 a.shmid = args->arg1;
  239                 a.shmaddr = args->ptr;
  240                 a.shmflg = args->arg2;
  241                 a.raddr = (l_ulong *)args->arg3;
  242                 return (linux_shmat(td, &a));
  243         }
  244         case LINUX_SHMDT: {
  245                 struct linux_shmdt_args a;
  246 
  247                 a.shmaddr = args->ptr;
  248                 return (linux_shmdt(td, &a));
  249         }
  250         case LINUX_SHMGET: {
  251                 struct linux_shmget_args a;
  252 
  253                 a.key = args->arg1;
  254                 a.size = args->arg2;
  255                 a.shmflg = args->arg3;
  256                 return (linux_shmget(td, &a));
  257         }
  258         case LINUX_SHMCTL: {
  259                 struct linux_shmctl_args a;
  260 
  261                 a.shmid = args->arg1;
  262                 a.cmd = args->arg2;
  263                 a.buf = args->ptr;
  264                 return (linux_shmctl(td, &a));
  265         }
  266         default:
  267                 break;
  268         }
  269 
  270         return (EINVAL);
  271 }
  272 
  273 int
  274 linux_old_select(struct thread *td, struct linux_old_select_args *args)
  275 {
  276         struct l_old_select_argv linux_args;
  277         struct linux_select_args newsel;
  278         int error;
  279 
  280 #ifdef DEBUG
  281         if (ldebug(old_select))
  282                 printf(ARGS(old_select, "%p"), args->ptr);
  283 #endif
  284 
  285         error = copyin(args->ptr, &linux_args, sizeof(linux_args));
  286         if (error)
  287                 return (error);
  288 
  289         newsel.nfds = linux_args.nfds;
  290         newsel.readfds = linux_args.readfds;
  291         newsel.writefds = linux_args.writefds;
  292         newsel.exceptfds = linux_args.exceptfds;
  293         newsel.timeout = linux_args.timeout;
  294         return (linux_select(td, &newsel));
  295 }
  296 
  297 int
  298 linux_fork(struct thread *td, struct linux_fork_args *args)
  299 {
  300         int error;
  301         struct proc *p2;
  302         struct thread *td2;
  303 
  304 #ifdef DEBUG
  305         if (ldebug(fork))
  306                 printf(ARGS(fork, ""));
  307 #endif
  308 
  309         if ((error = fork1(td, RFFDG | RFPROC | RFSTOPPED, 0, &p2)) != 0)
  310                 return (error);
  311         
  312         if (error == 0) {
  313                 td->td_retval[0] = p2->p_pid;
  314                 td->td_retval[1] = 0;
  315         }
  316 
  317         if (td->td_retval[1] == 1)
  318                 td->td_retval[0] = 0;
  319         error = linux_proc_init(td, td->td_retval[0], 0);
  320         if (error)
  321                 return (error);
  322 
  323         td2 = FIRST_THREAD_IN_PROC(p2);
  324 
  325         /*
  326          * Make this runnable after we are finished with it.
  327          */
  328         thread_lock(td2);
  329         TD_SET_CAN_RUN(td2);
  330         sched_add(td2, SRQ_BORING);
  331         thread_unlock(td2);
  332 
  333         return (0);
  334 }
  335 
  336 int
  337 linux_vfork(struct thread *td, struct linux_vfork_args *args)
  338 {
  339         int error;
  340         struct proc *p2;
  341         struct thread *td2;
  342 
  343 #ifdef DEBUG
  344         if (ldebug(vfork))
  345                 printf(ARGS(vfork, ""));
  346 #endif
  347 
  348         /* exclude RFPPWAIT */
  349         if ((error = fork1(td, RFFDG | RFPROC | RFMEM | RFSTOPPED, 0, &p2)) != 0)
  350                 return (error);
  351         if (error == 0) {
  352                 td->td_retval[0] = p2->p_pid;
  353                 td->td_retval[1] = 0;
  354         }
  355         /* Are we the child? */
  356         if (td->td_retval[1] == 1)
  357                 td->td_retval[0] = 0;
  358         error = linux_proc_init(td, td->td_retval[0], 0);
  359         if (error)
  360                 return (error);
  361 
  362         PROC_LOCK(p2);
  363         p2->p_flag |= P_PPWAIT;
  364         PROC_UNLOCK(p2);
  365 
  366         td2 = FIRST_THREAD_IN_PROC(p2);
  367         
  368         /*
  369          * Make this runnable after we are finished with it.
  370          */
  371         thread_lock(td2);
  372         TD_SET_CAN_RUN(td2);
  373         sched_add(td2, SRQ_BORING);
  374         thread_unlock(td2);
  375 
  376         /* wait for the children to exit, ie. emulate vfork */
  377         PROC_LOCK(p2);
  378         while (p2->p_flag & P_PPWAIT)
  379                 msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0);
  380         PROC_UNLOCK(p2);
  381 
  382         return (0);
  383 }
  384 
  385 int
  386 linux_clone(struct thread *td, struct linux_clone_args *args)
  387 {
  388         int error, ff = RFPROC | RFSTOPPED;
  389         struct proc *p2;
  390         struct thread *td2;
  391         int exit_signal;
  392         struct linux_emuldata *em;
  393 
  394 #ifdef DEBUG
  395         if (ldebug(clone)) {
  396                 printf(ARGS(clone, "flags %x, stack %x, parent tid: %x, child tid: %x"),
  397                     (unsigned int)args->flags, (unsigned int)args->stack, 
  398                     (unsigned int)args->parent_tidptr, (unsigned int)args->child_tidptr);
  399         }
  400 #endif
  401 
  402         exit_signal = args->flags & 0x000000ff;
  403         if (LINUX_SIG_VALID(exit_signal)) {
  404                 if (exit_signal <= LINUX_SIGTBLSZ)
  405                         exit_signal =
  406                             linux_to_bsd_signal[_SIG_IDX(exit_signal)];
  407         } else if (exit_signal != 0)
  408                 return (EINVAL);
  409 
  410         if (args->flags & LINUX_CLONE_VM)
  411                 ff |= RFMEM;
  412         if (args->flags & LINUX_CLONE_SIGHAND)
  413                 ff |= RFSIGSHARE;
  414         /* 
  415          * XXX: in linux sharing of fs info (chroot/cwd/umask)
  416          * and open files is independant. in fbsd its in one
  417          * structure but in reality it doesn't cause any problems
  418          * because both of these flags are usually set together.
  419          */
  420         if (!(args->flags & (LINUX_CLONE_FILES | LINUX_CLONE_FS)))
  421                 ff |= RFFDG;
  422 
  423         /*
  424          * Attempt to detect when linux_clone(2) is used for creating
  425          * kernel threads. Unfortunately despite the existence of the
  426          * CLONE_THREAD flag, version of linuxthreads package used in
  427          * most popular distros as of beginning of 2005 doesn't make
  428          * any use of it. Therefore, this detection relies on
  429          * empirical observation that linuxthreads sets certain
  430          * combination of flags, so that we can make more or less
  431          * precise detection and notify the FreeBSD kernel that several
  432          * processes are in fact part of the same threading group, so
  433          * that special treatment is necessary for signal delivery
  434          * between those processes and fd locking.
  435          */
  436         if ((args->flags & 0xffffff00) == LINUX_THREADING_FLAGS)
  437                 ff |= RFTHREAD;
  438 
  439         if (args->flags & LINUX_CLONE_PARENT_SETTID)
  440                 if (args->parent_tidptr == NULL)
  441                         return (EINVAL);
  442 
  443         error = fork1(td, ff, 0, &p2);
  444         if (error)
  445                 return (error);
  446 
  447         if (args->flags & (LINUX_CLONE_PARENT | LINUX_CLONE_THREAD)) {
  448                 sx_xlock(&proctree_lock);
  449                 PROC_LOCK(p2);
  450                 proc_reparent(p2, td->td_proc->p_pptr);
  451                 PROC_UNLOCK(p2);
  452                 sx_xunlock(&proctree_lock);
  453         }
  454         
  455         /* create the emuldata */
  456         error = linux_proc_init(td, p2->p_pid, args->flags);
  457         /* reference it - no need to check this */
  458         em = em_find(p2, EMUL_DOLOCK);
  459         KASSERT(em != NULL, ("clone: emuldata not found.\n"));
  460         /* and adjust it */
  461 
  462         if (args->flags & LINUX_CLONE_THREAD) {
  463                 /* XXX: linux mangles pgrp and pptr somehow
  464                  * I think it might be this but I am not sure.
  465                  */
  466 #ifdef notyet
  467                 PROC_LOCK(p2);
  468                 p2->p_pgrp = td->td_proc->p_pgrp;
  469                 PROC_UNLOCK(p2);
  470 #endif
  471                 exit_signal = 0;
  472         }
  473 
  474         if (args->flags & LINUX_CLONE_CHILD_SETTID)
  475                 em->child_set_tid = args->child_tidptr;
  476         else
  477                 em->child_set_tid = NULL;
  478 
  479         if (args->flags & LINUX_CLONE_CHILD_CLEARTID)
  480                 em->child_clear_tid = args->child_tidptr;
  481         else
  482                 em->child_clear_tid = NULL;
  483 
  484         EMUL_UNLOCK(&emul_lock);
  485 
  486         if (args->flags & LINUX_CLONE_PARENT_SETTID) {
  487                 error = copyout(&p2->p_pid, args->parent_tidptr, sizeof(p2->p_pid));
  488                 if (error)
  489                         printf(LMSG("copyout failed!"));
  490         }
  491 
  492         PROC_LOCK(p2);
  493         p2->p_sigparent = exit_signal;
  494         PROC_UNLOCK(p2);
  495         td2 = FIRST_THREAD_IN_PROC(p2);
  496         /* 
  497          * in a case of stack = NULL we are supposed to COW calling process stack
  498          * this is what normal fork() does so we just keep the tf_esp arg intact
  499          */
  500         if (args->stack)
  501                 td2->td_frame->tf_esp = (unsigned int)args->stack;
  502 
  503         if (args->flags & LINUX_CLONE_SETTLS) {
  504                 struct l_user_desc info;
  505                 int idx;
  506                 int a[2];
  507                 struct segment_descriptor sd;
  508 
  509                 error = copyin((void *)td->td_frame->tf_esi, &info, sizeof(struct l_user_desc));
  510                 if (error) {
  511                         printf(LMSG("copyin failed!"));
  512                 } else {
  513                 
  514                         idx = info.entry_number;
  515                 
  516                         /* 
  517                          * looks like we're getting the idx we returned
  518                          * in the set_thread_area() syscall
  519                          */
  520                         if (idx != 6 && idx != 3) {
  521                                 printf(LMSG("resetting idx!"));
  522                                 idx = 3;
  523                         }
  524 
  525                         /* this doesnt happen in practice */
  526                         if (idx == 6) {
  527                                 /* we might copy out the entry_number as 3 */
  528                                 info.entry_number = 3;
  529                                 error = copyout(&info, (void *) td->td_frame->tf_esi, sizeof(struct l_user_desc));
  530                                 if (error)
  531                                         printf(LMSG("copyout failed!"));
  532                         }
  533 
  534                         a[0] = LINUX_LDT_entry_a(&info);
  535                         a[1] = LINUX_LDT_entry_b(&info);
  536 
  537                         memcpy(&sd, &a, sizeof(a));
  538 #ifdef DEBUG
  539                 if (ldebug(clone))
  540                         printf("Segment created in clone with CLONE_SETTLS: lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, type: %i, dpl: %i, p: %i, xx: %i, def32: %i, gran: %i\n", sd.sd_lobase,
  541                         sd.sd_hibase,
  542                         sd.sd_lolimit,
  543                         sd.sd_hilimit,
  544                         sd.sd_type,
  545                         sd.sd_dpl,
  546                         sd.sd_p,
  547                         sd.sd_xx,
  548                         sd.sd_def32,
  549                         sd.sd_gran);
  550 #endif
  551 
  552                         /* set %gs */
  553                         td2->td_pcb->pcb_gsd = sd;
  554                         td2->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL);
  555                 }
  556         } 
  557 
  558 #ifdef DEBUG
  559         if (ldebug(clone))
  560                 printf(LMSG("clone: successful rfork to %ld, stack %p sig = %d"),
  561                     (long)p2->p_pid, args->stack, exit_signal);
  562 #endif
  563         if (args->flags & LINUX_CLONE_VFORK) {
  564                 PROC_LOCK(p2);
  565                 p2->p_flag |= P_PPWAIT;
  566                 PROC_UNLOCK(p2);
  567         }
  568 
  569         /*
  570          * Make this runnable after we are finished with it.
  571          */
  572         thread_lock(td2);
  573         TD_SET_CAN_RUN(td2);
  574         sched_add(td2, SRQ_BORING);
  575         thread_unlock(td2);
  576 
  577         td->td_retval[0] = p2->p_pid;
  578         td->td_retval[1] = 0;
  579 
  580         if (args->flags & LINUX_CLONE_VFORK) {
  581                 /* wait for the children to exit, ie. emulate vfork */
  582                 PROC_LOCK(p2);
  583                 while (p2->p_flag & P_PPWAIT)
  584                         msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0);
  585                 PROC_UNLOCK(p2);
  586         }
  587 
  588         return (0);
  589 }
  590 
  591 #define STACK_SIZE  (2 * 1024 * 1024)
  592 #define GUARD_SIZE  (4 * PAGE_SIZE)
  593 
  594 static int linux_mmap_common(struct thread *, struct l_mmap_argv *);
  595 
  596 int
  597 linux_mmap2(struct thread *td, struct linux_mmap2_args *args)
  598 {
  599         struct l_mmap_argv linux_args;
  600 
  601 #ifdef DEBUG
  602         if (ldebug(mmap2))
  603                 printf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"),
  604                     (void *)args->addr, args->len, args->prot,
  605                     args->flags, args->fd, args->pgoff);
  606 #endif
  607 
  608         linux_args.addr = args->addr;
  609         linux_args.len = args->len;
  610         linux_args.prot = args->prot;
  611         linux_args.flags = args->flags;
  612         linux_args.fd = args->fd;
  613         linux_args.pgoff = args->pgoff * PAGE_SIZE;
  614 
  615         return (linux_mmap_common(td, &linux_args));
  616 }
  617 
  618 int
  619 linux_mmap(struct thread *td, struct linux_mmap_args *args)
  620 {
  621         int error;
  622         struct l_mmap_argv linux_args;
  623 
  624         error = copyin(args->ptr, &linux_args, sizeof(linux_args));
  625         if (error)
  626                 return (error);
  627 
  628 #ifdef DEBUG
  629         if (ldebug(mmap))
  630                 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"),
  631                     (void *)linux_args.addr, linux_args.len, linux_args.prot,
  632                     linux_args.flags, linux_args.fd, linux_args.pgoff);
  633 #endif
  634 
  635         return (linux_mmap_common(td, &linux_args));
  636 }
  637 
  638 static int
  639 linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args)
  640 {
  641         struct proc *p = td->td_proc;
  642         struct mmap_args /* {
  643                 caddr_t addr;
  644                 size_t len;
  645                 int prot;
  646                 int flags;
  647                 int fd;
  648                 long pad;
  649                 off_t pos;
  650         } */ bsd_args;
  651         int error;
  652         struct file *fp;
  653 
  654         error = 0;
  655         bsd_args.flags = 0;
  656         fp = NULL;
  657 
  658         /*
  659          * Linux mmap(2):
  660          * You must specify exactly one of MAP_SHARED and MAP_PRIVATE
  661          */
  662         if (! ((linux_args->flags & LINUX_MAP_SHARED) ^
  663             (linux_args->flags & LINUX_MAP_PRIVATE)))
  664                 return (EINVAL);
  665 
  666         if (linux_args->flags & LINUX_MAP_SHARED)
  667                 bsd_args.flags |= MAP_SHARED;
  668         if (linux_args->flags & LINUX_MAP_PRIVATE)
  669                 bsd_args.flags |= MAP_PRIVATE;
  670         if (linux_args->flags & LINUX_MAP_FIXED)
  671                 bsd_args.flags |= MAP_FIXED;
  672         if (linux_args->flags & LINUX_MAP_ANON)
  673                 bsd_args.flags |= MAP_ANON;
  674         else
  675                 bsd_args.flags |= MAP_NOSYNC;
  676         if (linux_args->flags & LINUX_MAP_GROWSDOWN)
  677                 bsd_args.flags |= MAP_STACK;
  678 
  679         /*
  680          * PROT_READ, PROT_WRITE, or PROT_EXEC implies PROT_READ and PROT_EXEC
  681          * on Linux/i386. We do this to ensure maximum compatibility.
  682          * Linux/ia64 does the same in i386 emulation mode.
  683          */
  684         bsd_args.prot = linux_args->prot;
  685         if (bsd_args.prot & (PROT_READ | PROT_WRITE | PROT_EXEC))
  686                 bsd_args.prot |= PROT_READ | PROT_EXEC;
  687 
  688         /* Linux does not check file descriptor when MAP_ANONYMOUS is set. */
  689         bsd_args.fd = (bsd_args.flags & MAP_ANON) ? -1 : linux_args->fd;
  690         if (bsd_args.fd != -1) {
  691                 /*
  692                  * Linux follows Solaris mmap(2) description:
  693                  * The file descriptor fildes is opened with
  694                  * read permission, regardless of the
  695                  * protection options specified.
  696                  */
  697 
  698                 if ((error = fget(td, bsd_args.fd, &fp)) != 0)
  699                         return (error);
  700                 if (fp->f_type != DTYPE_VNODE) {
  701                         fdrop(fp, td);
  702                         return (EINVAL);
  703                 }
  704 
  705                 /* Linux mmap() just fails for O_WRONLY files */
  706                 if (!(fp->f_flag & FREAD)) {
  707                         fdrop(fp, td);
  708                         return (EACCES);
  709                 }
  710 
  711                 fdrop(fp, td);
  712         }
  713 
  714         if (linux_args->flags & LINUX_MAP_GROWSDOWN) {
  715                 /* 
  716                  * The linux MAP_GROWSDOWN option does not limit auto
  717                  * growth of the region.  Linux mmap with this option
  718                  * takes as addr the inital BOS, and as len, the initial
  719                  * region size.  It can then grow down from addr without
  720                  * limit.  However, linux threads has an implicit internal
  721                  * limit to stack size of STACK_SIZE.  Its just not
  722                  * enforced explicitly in linux.  But, here we impose
  723                  * a limit of (STACK_SIZE - GUARD_SIZE) on the stack
  724                  * region, since we can do this with our mmap.
  725                  *
  726                  * Our mmap with MAP_STACK takes addr as the maximum
  727                  * downsize limit on BOS, and as len the max size of
  728                  * the region.  It them maps the top SGROWSIZ bytes,
  729                  * and auto grows the region down, up to the limit
  730                  * in addr.
  731                  *
  732                  * If we don't use the MAP_STACK option, the effect
  733                  * of this code is to allocate a stack region of a
  734                  * fixed size of (STACK_SIZE - GUARD_SIZE).
  735                  */
  736 
  737                 if ((caddr_t)PTRIN(linux_args->addr) + linux_args->len >
  738                     p->p_vmspace->vm_maxsaddr) {
  739                         /* 
  740                          * Some linux apps will attempt to mmap
  741                          * thread stacks near the top of their
  742                          * address space.  If their TOS is greater
  743                          * than vm_maxsaddr, vm_map_growstack()
  744                          * will confuse the thread stack with the
  745                          * process stack and deliver a SEGV if they
  746                          * attempt to grow the thread stack past their
  747                          * current stacksize rlimit.  To avoid this,
  748                          * adjust vm_maxsaddr upwards to reflect
  749                          * the current stacksize rlimit rather
  750                          * than the maximum possible stacksize.
  751                          * It would be better to adjust the
  752                          * mmap'ed region, but some apps do not check
  753                          * mmap's return value.
  754                          */
  755                         PROC_LOCK(p);
  756                         p->p_vmspace->vm_maxsaddr = (char *)USRSTACK -
  757                             lim_cur(p, RLIMIT_STACK);
  758                         PROC_UNLOCK(p);
  759                 }
  760 
  761                 /* This gives us our maximum stack size */
  762                 if (linux_args->len > STACK_SIZE - GUARD_SIZE)
  763                         bsd_args.len = linux_args->len;
  764                 else
  765                         bsd_args.len  = STACK_SIZE - GUARD_SIZE;
  766 
  767                 /* 
  768                  * This gives us a new BOS.  If we're using VM_STACK, then
  769                  * mmap will just map the top SGROWSIZ bytes, and let
  770                  * the stack grow down to the limit at BOS.  If we're
  771                  * not using VM_STACK we map the full stack, since we
  772                  * don't have a way to autogrow it.
  773                  */
  774                 bsd_args.addr = (caddr_t)PTRIN(linux_args->addr) -
  775                     bsd_args.len;
  776         } else {
  777                 bsd_args.addr = (caddr_t)PTRIN(linux_args->addr);
  778                 bsd_args.len  = linux_args->len;
  779         }
  780         bsd_args.pos = linux_args->pgoff;
  781 
  782 #ifdef DEBUG
  783         if (ldebug(mmap))
  784                 printf("-> %s(%p, %d, %d, 0x%08x, %d, 0x%x)\n",
  785                     __func__,
  786                     (void *)bsd_args.addr, bsd_args.len, bsd_args.prot,
  787                     bsd_args.flags, bsd_args.fd, (int)bsd_args.pos);
  788 #endif
  789         error = mmap(td, &bsd_args);
  790 #ifdef DEBUG
  791         if (ldebug(mmap))
  792                 printf("-> %s() return: 0x%x (0x%08x)\n",
  793                         __func__, error, (u_int)td->td_retval[0]);
  794 #endif
  795         return (error);
  796 }
  797 
  798 int
  799 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
  800 {
  801         struct mprotect_args bsd_args;
  802 
  803         bsd_args.addr = uap->addr;
  804         bsd_args.len = uap->len;
  805         bsd_args.prot = uap->prot;
  806         if (bsd_args.prot & (PROT_READ | PROT_WRITE | PROT_EXEC))
  807                 bsd_args.prot |= PROT_READ | PROT_EXEC;
  808         return (mprotect(td, &bsd_args));
  809 }
  810 
  811 int
  812 linux_pipe(struct thread *td, struct linux_pipe_args *args)
  813 {
  814         int error;
  815         int reg_edx;
  816 
  817 #ifdef DEBUG
  818         if (ldebug(pipe))
  819                 printf(ARGS(pipe, "*"));
  820 #endif
  821 
  822         reg_edx = td->td_retval[1];
  823         error = pipe(td, 0);
  824         if (error) {
  825                 td->td_retval[1] = reg_edx;
  826                 return (error);
  827         }
  828 
  829         error = copyout(td->td_retval, args->pipefds, 2*sizeof(int));
  830         if (error) {
  831                 td->td_retval[1] = reg_edx;
  832                 return (error);
  833         }
  834 
  835         td->td_retval[1] = reg_edx;
  836         td->td_retval[0] = 0;
  837         return (0);
  838 }
  839 
  840 int
  841 linux_ioperm(struct thread *td, struct linux_ioperm_args *args)
  842 {
  843         int error;
  844         struct i386_ioperm_args iia;
  845 
  846         iia.start = args->start;
  847         iia.length = args->length;
  848         iia.enable = args->enable;
  849         error = i386_set_ioperm(td, &iia);
  850         return (error);
  851 }
  852 
  853 int
  854 linux_iopl(struct thread *td, struct linux_iopl_args *args)
  855 {
  856         int error;
  857 
  858         if (args->level < 0 || args->level > 3)
  859                 return (EINVAL);
  860         if ((error = priv_check(td, PRIV_IO)) != 0)
  861                 return (error);
  862         if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
  863                 return (error);
  864         td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) |
  865             (args->level * (PSL_IOPL / 3));
  866         return (0);
  867 }
  868 
  869 int
  870 linux_modify_ldt(struct thread *td, struct linux_modify_ldt_args *uap)
  871 {
  872         int error;
  873         struct i386_ldt_args ldt;
  874         struct l_descriptor ld;
  875         union descriptor desc;
  876         int size, written;
  877 
  878         if (uap->ptr == NULL)
  879                 return (EINVAL);
  880 
  881         switch (uap->func) {
  882         case 0x00: /* read_ldt */
  883                 ldt.start = 0;
  884                 ldt.descs = uap->ptr;
  885                 ldt.num = uap->bytecount / sizeof(union descriptor);
  886                 error = i386_get_ldt(td, &ldt);
  887                 td->td_retval[0] *= sizeof(union descriptor);
  888                 break;
  889         case 0x02: /* read_default_ldt = 0 */
  890                 size = 5*sizeof(struct l_desc_struct);
  891                 if (size > uap->bytecount)
  892                         size = uap->bytecount;
  893                 for (written = error = 0; written < size && error == 0; written++)
  894                         error = subyte((char *)uap->ptr + written, 0);
  895                 td->td_retval[0] = written;
  896                 break;
  897         case 0x01: /* write_ldt */
  898         case 0x11: /* write_ldt */
  899                 if (uap->bytecount != sizeof(ld))
  900                         return (EINVAL);
  901 
  902                 error = copyin(uap->ptr, &ld, sizeof(ld));
  903                 if (error)
  904                         return (error);
  905 
  906                 ldt.start = ld.entry_number;
  907                 ldt.descs = &desc;
  908                 ldt.num = 1;
  909                 desc.sd.sd_lolimit = (ld.limit & 0x0000ffff);
  910                 desc.sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
  911                 desc.sd.sd_lobase = (ld.base_addr & 0x00ffffff);
  912                 desc.sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
  913                 desc.sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) |
  914                         (ld.contents << 2);
  915                 desc.sd.sd_dpl = 3;
  916                 desc.sd.sd_p = (ld.seg_not_present ^ 1);
  917                 desc.sd.sd_xx = 0;
  918                 desc.sd.sd_def32 = ld.seg_32bit;
  919                 desc.sd.sd_gran = ld.limit_in_pages;
  920                 error = i386_set_ldt(td, &ldt, &desc);
  921                 break;
  922         default:
  923                 error = EINVAL;
  924                 break;
  925         }
  926 
  927         if (error == EOPNOTSUPP) {
  928                 printf("linux: modify_ldt needs kernel option USER_LDT\n");
  929                 error = ENOSYS;
  930         }
  931 
  932         return (error);
  933 }
  934 
  935 int
  936 linux_sigaction(struct thread *td, struct linux_sigaction_args *args)
  937 {
  938         l_osigaction_t osa;
  939         l_sigaction_t act, oact;
  940         int error;
  941 
  942 #ifdef DEBUG
  943         if (ldebug(sigaction))
  944                 printf(ARGS(sigaction, "%d, %p, %p"),
  945                     args->sig, (void *)args->nsa, (void *)args->osa);
  946 #endif
  947 
  948         if (args->nsa != NULL) {
  949                 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
  950                 if (error)
  951                         return (error);
  952                 act.lsa_handler = osa.lsa_handler;
  953                 act.lsa_flags = osa.lsa_flags;
  954                 act.lsa_restorer = osa.lsa_restorer;
  955                 LINUX_SIGEMPTYSET(act.lsa_mask);
  956                 act.lsa_mask.__bits[0] = osa.lsa_mask;
  957         }
  958 
  959         error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL,
  960             args->osa ? &oact : NULL);
  961 
  962         if (args->osa != NULL && !error) {
  963                 osa.lsa_handler = oact.lsa_handler;
  964                 osa.lsa_flags = oact.lsa_flags;
  965                 osa.lsa_restorer = oact.lsa_restorer;
  966                 osa.lsa_mask = oact.lsa_mask.__bits[0];
  967                 error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
  968         }
  969 
  970         return (error);
  971 }
  972 
  973 /*
  974  * Linux has two extra args, restart and oldmask.  We dont use these,
  975  * but it seems that "restart" is actually a context pointer that
  976  * enables the signal to happen with a different register set.
  977  */
  978 int
  979 linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args)
  980 {
  981         sigset_t sigmask;
  982         l_sigset_t mask;
  983 
  984 #ifdef DEBUG
  985         if (ldebug(sigsuspend))
  986                 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
  987 #endif
  988 
  989         LINUX_SIGEMPTYSET(mask);
  990         mask.__bits[0] = args->mask;
  991         linux_to_bsd_sigset(&mask, &sigmask);
  992         return (kern_sigsuspend(td, sigmask));
  993 }
  994 
  995 int
  996 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
  997 {
  998         l_sigset_t lmask;
  999         sigset_t sigmask;
 1000         int error;
 1001 
 1002 #ifdef DEBUG
 1003         if (ldebug(rt_sigsuspend))
 1004                 printf(ARGS(rt_sigsuspend, "%p, %d"),
 1005                     (void *)uap->newset, uap->sigsetsize);
 1006 #endif
 1007 
 1008         if (uap->sigsetsize != sizeof(l_sigset_t))
 1009                 return (EINVAL);
 1010 
 1011         error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
 1012         if (error)
 1013                 return (error);
 1014 
 1015         linux_to_bsd_sigset(&lmask, &sigmask);
 1016         return (kern_sigsuspend(td, sigmask));
 1017 }
 1018 
 1019 int
 1020 linux_pause(struct thread *td, struct linux_pause_args *args)
 1021 {
 1022         struct proc *p = td->td_proc;
 1023         sigset_t sigmask;
 1024 
 1025 #ifdef DEBUG
 1026         if (ldebug(pause))
 1027                 printf(ARGS(pause, ""));
 1028 #endif
 1029 
 1030         PROC_LOCK(p);
 1031         sigmask = td->td_sigmask;
 1032         PROC_UNLOCK(p);
 1033         return (kern_sigsuspend(td, sigmask));
 1034 }
 1035 
 1036 int
 1037 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
 1038 {
 1039         stack_t ss, oss;
 1040         l_stack_t lss;
 1041         int error;
 1042 
 1043 #ifdef DEBUG
 1044         if (ldebug(sigaltstack))
 1045                 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
 1046 #endif
 1047 
 1048         if (uap->uss != NULL) {
 1049                 error = copyin(uap->uss, &lss, sizeof(l_stack_t));
 1050                 if (error)
 1051                         return (error);
 1052 
 1053                 ss.ss_sp = lss.ss_sp;
 1054                 ss.ss_size = lss.ss_size;
 1055                 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags);
 1056         }
 1057         error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL,
 1058             (uap->uoss != NULL) ? &oss : NULL);
 1059         if (!error && uap->uoss != NULL) {
 1060                 lss.ss_sp = oss.ss_sp;
 1061                 lss.ss_size = oss.ss_size;
 1062                 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
 1063                 error = copyout(&lss, uap->uoss, sizeof(l_stack_t));
 1064         }
 1065 
 1066         return (error);
 1067 }
 1068 
 1069 int
 1070 linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args)
 1071 {
 1072         struct ftruncate_args sa;
 1073 
 1074 #ifdef DEBUG
 1075         if (ldebug(ftruncate64))
 1076                 printf(ARGS(ftruncate64, "%u, %jd"), args->fd,
 1077                     (intmax_t)args->length);
 1078 #endif
 1079 
 1080         sa.fd = args->fd;
 1081         sa.length = args->length;
 1082         return ftruncate(td, &sa);
 1083 }
 1084 
 1085 int
 1086 linux_set_thread_area(struct thread *td, struct linux_set_thread_area_args *args)
 1087 {
 1088         struct l_user_desc info;
 1089         int error;
 1090         int idx;
 1091         int a[2];
 1092         struct segment_descriptor sd;
 1093 
 1094         error = copyin(args->desc, &info, sizeof(struct l_user_desc));
 1095         if (error)
 1096                 return (error);
 1097 
 1098 #ifdef DEBUG
 1099         if (ldebug(set_thread_area))
 1100                 printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"),
 1101                       info.entry_number,
 1102                       info.base_addr,
 1103                       info.limit,
 1104                       info.seg_32bit,
 1105                       info.contents,
 1106                       info.read_exec_only,
 1107                       info.limit_in_pages,
 1108                       info.seg_not_present,
 1109                       info.useable);
 1110 #endif
 1111 
 1112         idx = info.entry_number;
 1113         /* 
 1114          * Semantics of linux version: every thread in the system has array of
 1115          * 3 tls descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. This 
 1116          * syscall loads one of the selected tls decriptors with a value and
 1117          * also loads GDT descriptors 6, 7 and 8 with the content of the
 1118          * per-thread descriptors.
 1119          *
 1120          * Semantics of fbsd version: I think we can ignore that linux has 3 
 1121          * per-thread descriptors and use just the 1st one. The tls_array[]
 1122          * is used only in set/get-thread_area() syscalls and for loading the
 1123          * GDT descriptors. In fbsd we use just one GDT descriptor for TLS so
 1124          * we will load just one. 
 1125          *
 1126          * XXX: this doesn't work when a user space process tries to use more
 1127          * than 1 TLS segment. Comment in the linux sources says wine might do
 1128          * this.
 1129          */
 1130 
 1131         /* 
 1132          * we support just GLIBC TLS now 
 1133          * we should let 3 proceed as well because we use this segment so
 1134          * if code does two subsequent calls it should succeed
 1135          */
 1136         if (idx != 6 && idx != -1 && idx != 3)
 1137                 return (EINVAL);
 1138 
 1139         /* 
 1140          * we have to copy out the GDT entry we use
 1141          * FreeBSD uses GDT entry #3 for storing %gs so load that
 1142          *
 1143          * XXX: what if a user space program doesn't check this value and tries
 1144          * to use 6, 7 or 8? 
 1145          */
 1146         idx = info.entry_number = 3;
 1147         error = copyout(&info, args->desc, sizeof(struct l_user_desc));
 1148         if (error)
 1149                 return (error);
 1150 
 1151         if (LINUX_LDT_empty(&info)) {
 1152                 a[0] = 0;
 1153                 a[1] = 0;
 1154         } else {
 1155                 a[0] = LINUX_LDT_entry_a(&info);
 1156                 a[1] = LINUX_LDT_entry_b(&info);
 1157         }
 1158 
 1159         memcpy(&sd, &a, sizeof(a));
 1160 #ifdef DEBUG
 1161         if (ldebug(set_thread_area))
 1162                 printf("Segment created in set_thread_area: lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, type: %i, dpl: %i, p: %i, xx: %i, def32: %i, gran: %i\n", sd.sd_lobase,
 1163                         sd.sd_hibase,
 1164                         sd.sd_lolimit,
 1165                         sd.sd_hilimit,
 1166                         sd.sd_type,
 1167                         sd.sd_dpl,
 1168                         sd.sd_p,
 1169                         sd.sd_xx,
 1170                         sd.sd_def32,
 1171                         sd.sd_gran);
 1172 #endif
 1173 
 1174         /* this is taken from i386 version of cpu_set_user_tls() */
 1175         critical_enter();
 1176         /* set %gs */
 1177         td->td_pcb->pcb_gsd = sd;
 1178         PCPU_GET(fsgs_gdt)[1] = sd;
 1179         load_gs(GSEL(GUGS_SEL, SEL_UPL));
 1180         critical_exit();
 1181    
 1182         return (0);
 1183 }
 1184 
 1185 int
 1186 linux_get_thread_area(struct thread *td, struct linux_get_thread_area_args *args)
 1187 {
 1188         
 1189         struct l_user_desc info;
 1190         int error;
 1191         int idx;
 1192         struct l_desc_struct desc;
 1193         struct segment_descriptor sd;
 1194 
 1195 #ifdef DEBUG
 1196         if (ldebug(get_thread_area))
 1197                 printf(ARGS(get_thread_area, "%p"), args->desc);
 1198 #endif
 1199 
 1200         error = copyin(args->desc, &info, sizeof(struct l_user_desc));
 1201         if (error)
 1202                 return (error);
 1203 
 1204         idx = info.entry_number;
 1205         /* XXX: I am not sure if we want 3 to be allowed too. */
 1206         if (idx != 6 && idx != 3)
 1207                 return (EINVAL);
 1208 
 1209         idx = 3;
 1210 
 1211         memset(&info, 0, sizeof(info));
 1212 
 1213         sd = PCPU_GET(fsgs_gdt)[1];
 1214 
 1215         memcpy(&desc, &sd, sizeof(desc));
 1216 
 1217         info.entry_number = idx;
 1218         info.base_addr = LINUX_GET_BASE(&desc);
 1219         info.limit = LINUX_GET_LIMIT(&desc);
 1220         info.seg_32bit = LINUX_GET_32BIT(&desc);
 1221         info.contents = LINUX_GET_CONTENTS(&desc);
 1222         info.read_exec_only = !LINUX_GET_WRITABLE(&desc);
 1223         info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc);
 1224         info.seg_not_present = !LINUX_GET_PRESENT(&desc);
 1225         info.useable = LINUX_GET_USEABLE(&desc);
 1226 
 1227         error = copyout(&info, args->desc, sizeof(struct l_user_desc));
 1228         if (error)
 1229                 return (EFAULT);
 1230 
 1231         return (0);
 1232 }
 1233 
 1234 /* copied from kern/kern_time.c */
 1235 int
 1236 linux_timer_create(struct thread *td, struct linux_timer_create_args *args)
 1237 {
 1238         return ktimer_create(td, (struct ktimer_create_args *) args);
 1239 }
 1240 
 1241 int
 1242 linux_timer_settime(struct thread *td, struct linux_timer_settime_args *args)
 1243 {
 1244         return ktimer_settime(td, (struct ktimer_settime_args *) args);
 1245 }
 1246 
 1247 int
 1248 linux_timer_gettime(struct thread *td, struct linux_timer_gettime_args *args)
 1249 {
 1250         return ktimer_gettime(td, (struct ktimer_gettime_args *) args);
 1251 }
 1252 
 1253 int
 1254 linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *args)
 1255 {
 1256         return ktimer_getoverrun(td, (struct ktimer_getoverrun_args *) args);
 1257 }
 1258 
 1259 int
 1260 linux_timer_delete(struct thread *td, struct linux_timer_delete_args *args)
 1261 {
 1262         return ktimer_delete(td, (struct ktimer_delete_args *) args);
 1263 }
 1264 
 1265 /* XXX: this wont work with module - convert it */
 1266 int
 1267 linux_mq_open(struct thread *td, struct linux_mq_open_args *args)
 1268 {
 1269 #ifdef P1003_1B_MQUEUE
 1270         return kmq_open(td, (struct kmq_open_args *) args);
 1271 #else
 1272         return (ENOSYS);
 1273 #endif
 1274 }
 1275 
 1276 int
 1277 linux_mq_unlink(struct thread *td, struct linux_mq_unlink_args *args)
 1278 {
 1279 #ifdef P1003_1B_MQUEUE
 1280         return kmq_unlink(td, (struct kmq_unlink_args *) args);
 1281 #else
 1282         return (ENOSYS);
 1283 #endif
 1284 }
 1285 
 1286 int
 1287 linux_mq_timedsend(struct thread *td, struct linux_mq_timedsend_args *args)
 1288 {
 1289 #ifdef P1003_1B_MQUEUE
 1290         return kmq_timedsend(td, (struct kmq_timedsend_args *) args);
 1291 #else
 1292         return (ENOSYS);
 1293 #endif
 1294 }
 1295 
 1296 int
 1297 linux_mq_timedreceive(struct thread *td, struct linux_mq_timedreceive_args *args)
 1298 {
 1299 #ifdef P1003_1B_MQUEUE
 1300         return kmq_timedreceive(td, (struct kmq_timedreceive_args *) args);
 1301 #else
 1302         return (ENOSYS);
 1303 #endif
 1304 }
 1305 
 1306 int
 1307 linux_mq_notify(struct thread *td, struct linux_mq_notify_args *args)
 1308 {
 1309 #ifdef P1003_1B_MQUEUE
 1310         return kmq_notify(td, (struct kmq_notify_args *) args);
 1311 #else
 1312         return (ENOSYS);
 1313 #endif
 1314 }
 1315 
 1316 int
 1317 linux_mq_getsetattr(struct thread *td, struct linux_mq_getsetattr_args *args)
 1318 {
 1319 #ifdef P1003_1B_MQUEUE
 1320         return kmq_setattr(td, (struct kmq_setattr_args *) args);
 1321 #else
 1322         return (ENOSYS);
 1323 #endif
 1324 }
 1325 

Cache object: 543b2e44bd9f76549359f49c2dd51f5b


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.