linux_machdep.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2000 Marcel Moolenaar
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   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  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/capsicum.h>
   34 #include <sys/fcntl.h>
   35 #include <sys/file.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/priv.h>
   42 #include <sys/proc.h>
   43 #include <sys/queue.h>
   44 #include <sys/resource.h>
   45 #include <sys/resourcevar.h>
   46 #include <sys/sched.h>
   47 #include <sys/signalvar.h>
   48 #include <sys/syscallsubr.h>
   49 #include <sys/sysproto.h>
   50 #include <sys/systm.h>
   51 #include <sys/sx.h>
   52 #include <sys/unistd.h>
   53 #include <sys/wait.h>
   54 
   55 #include <machine/frame.h>
   56 #include <machine/psl.h>
   57 #include <machine/segments.h>
   58 #include <machine/sysarch.h>
   59 
   60 #include <vm/pmap.h>
   61 #include <vm/vm.h>
   62 #include <vm/vm_map.h>
   63 
   64 #include <security/audit/audit.h>
   65 
   66 #include <i386/linux/linux.h>
   67 #include <i386/linux/linux_proto.h>
   68 #include <compat/linux/linux_emul.h>
   69 #include <compat/linux/linux_ipc.h>
   70 #include <compat/linux/linux_misc.h>
   71 #include <compat/linux/linux_mmap.h>
   72 #include <compat/linux/linux_signal.h>
   73 #include <compat/linux/linux_util.h>
   74 
   75 #include <i386/include/pcb.h>                   /* needed for pcb definition in linux_set_thread_area */
   76 
   77 #include "opt_posix.h"
   78 
   79 extern struct sysentvec elf32_freebsd_sysvec;   /* defined in i386/i386/elf_machdep.c */
   80 
   81 struct l_descriptor {
   82         l_uint          entry_number;
   83         l_ulong         base_addr;
   84         l_uint          limit;
   85         l_uint          seg_32bit:1;
   86         l_uint          contents:2;
   87         l_uint          read_exec_only:1;
   88         l_uint          limit_in_pages:1;
   89         l_uint          seg_not_present:1;
   90         l_uint          useable:1;
   91 };
   92 
   93 struct l_old_select_argv {
   94         l_int           nfds;
   95         l_fd_set        *readfds;
   96         l_fd_set        *writefds;
   97         l_fd_set        *exceptfds;
   98         struct l_timeval        *timeout;
   99 };
  100 
  101 
  102 int
  103 linux_execve(struct thread *td, struct linux_execve_args *args)
  104 {
  105         struct image_args eargs;
  106         char *newpath;
  107         int error;
  108 
  109         LCONVPATHEXIST(td, args->path, &newpath);
  110 
  111         error = exec_copyin_args(&eargs, newpath, UIO_SYSSPACE,
  112             args->argp, args->envp);
  113         free(newpath, M_TEMP);
  114         if (error == 0)
  115                 error = linux_common_execve(td, &eargs);
  116         AUDIT_SYSCALL_EXIT(error == EJUSTRETURN ? 0 : error, td);
  117         return (error);
  118 }
  119 
  120 struct l_ipc_kludge {
  121         struct l_msgbuf *msgp;
  122         l_long msgtyp;
  123 };
  124 
  125 int
  126 linux_ipc(struct thread *td, struct linux_ipc_args *args)
  127 {
  128 
  129         switch (args->what & 0xFFFF) {
  130         case LINUX_SEMOP: {
  131                 struct linux_semop_args a;
  132 
  133                 a.semid = args->arg1;
  134                 a.tsops = PTRIN(args->ptr);
  135                 a.nsops = args->arg2;
  136                 return (linux_semop(td, &a));
  137         }
  138         case LINUX_SEMGET: {
  139                 struct linux_semget_args a;
  140 
  141                 a.key = args->arg1;
  142                 a.nsems = args->arg2;
  143                 a.semflg = args->arg3;
  144                 return (linux_semget(td, &a));
  145         }
  146         case LINUX_SEMCTL: {
  147                 struct linux_semctl_args a;
  148                 int error;
  149 
  150                 a.semid = args->arg1;
  151                 a.semnum = args->arg2;
  152                 a.cmd = args->arg3;
  153                 error = copyin(PTRIN(args->ptr), &a.arg, sizeof(a.arg));
  154                 if (error)
  155                         return (error);
  156                 return (linux_semctl(td, &a));
  157         }
  158         case LINUX_MSGSND: {
  159                 struct linux_msgsnd_args a;
  160 
  161                 a.msqid = args->arg1;
  162                 a.msgp = PTRIN(args->ptr);
  163                 a.msgsz = args->arg2;
  164                 a.msgflg = args->arg3;
  165                 return (linux_msgsnd(td, &a));
  166         }
  167         case LINUX_MSGRCV: {
  168                 struct linux_msgrcv_args a;
  169 
  170                 a.msqid = args->arg1;
  171                 a.msgsz = args->arg2;
  172                 a.msgflg = args->arg3;
  173                 if ((args->what >> 16) == 0) {
  174                         struct l_ipc_kludge tmp;
  175                         int error;
  176 
  177                         if (args->ptr == 0)
  178                                 return (EINVAL);
  179                         error = copyin(PTRIN(args->ptr), &tmp, sizeof(tmp));
  180                         if (error)
  181                                 return (error);
  182                         a.msgp = PTRIN(tmp.msgp);
  183                         a.msgtyp = tmp.msgtyp;
  184                 } else {
  185                         a.msgp = PTRIN(args->ptr);
  186                         a.msgtyp = args->arg5;
  187                 }
  188                 return (linux_msgrcv(td, &a));
  189         }
  190         case LINUX_MSGGET: {
  191                 struct linux_msgget_args a;
  192 
  193                 a.key = args->arg1;
  194                 a.msgflg = args->arg2;
  195                 return (linux_msgget(td, &a));
  196         }
  197         case LINUX_MSGCTL: {
  198                 struct linux_msgctl_args a;
  199 
  200                 a.msqid = args->arg1;
  201                 a.cmd = args->arg2;
  202                 a.buf = PTRIN(args->ptr);
  203                 return (linux_msgctl(td, &a));
  204         }
  205         case LINUX_SHMAT: {
  206                 struct linux_shmat_args a;
  207                 l_uintptr_t addr;
  208                 int error;
  209 
  210                 a.shmid = args->arg1;
  211                 a.shmaddr = PTRIN(args->ptr);
  212                 a.shmflg = args->arg2;
  213                 error = linux_shmat(td, &a);
  214                 if (error != 0)
  215                         return (error);
  216                 addr = td->td_retval[0];
  217                 error = copyout(&addr, PTRIN(args->arg3), sizeof(addr));
  218                 td->td_retval[0] = 0;
  219                 return (error);
  220         }
  221         case LINUX_SHMDT: {
  222                 struct linux_shmdt_args a;
  223 
  224                 a.shmaddr = PTRIN(args->ptr);
  225                 return (linux_shmdt(td, &a));
  226         }
  227         case LINUX_SHMGET: {
  228                 struct linux_shmget_args a;
  229 
  230                 a.key = args->arg1;
  231                 a.size = args->arg2;
  232                 a.shmflg = args->arg3;
  233                 return (linux_shmget(td, &a));
  234         }
  235         case LINUX_SHMCTL: {
  236                 struct linux_shmctl_args a;
  237 
  238                 a.shmid = args->arg1;
  239                 a.cmd = args->arg2;
  240                 a.buf = PTRIN(args->ptr);
  241                 return (linux_shmctl(td, &a));
  242         }
  243         default:
  244                 break;
  245         }
  246 
  247         return (EINVAL);
  248 }
  249 
  250 int
  251 linux_old_select(struct thread *td, struct linux_old_select_args *args)
  252 {
  253         struct l_old_select_argv linux_args;
  254         struct linux_select_args newsel;
  255         int error;
  256 
  257         error = copyin(args->ptr, &linux_args, sizeof(linux_args));
  258         if (error)
  259                 return (error);
  260 
  261         newsel.nfds = linux_args.nfds;
  262         newsel.readfds = linux_args.readfds;
  263         newsel.writefds = linux_args.writefds;
  264         newsel.exceptfds = linux_args.exceptfds;
  265         newsel.timeout = linux_args.timeout;
  266         return (linux_select(td, &newsel));
  267 }
  268 
  269 int
  270 linux_set_cloned_tls(struct thread *td, void *desc)
  271 {
  272         struct segment_descriptor sd;
  273         struct l_user_desc info;
  274         int idx, error;
  275         int a[2];
  276 
  277         error = copyin(desc, &info, sizeof(struct l_user_desc));
  278         if (error) {
  279                 linux_msg(td, "set_cloned_tls copyin failed!");
  280         } else {
  281                 idx = info.entry_number;
  282 
  283                 /*
  284                  * looks like we're getting the idx we returned
  285                  * in the set_thread_area() syscall
  286                  */
  287                 if (idx != 6 && idx != 3) {
  288                         linux_msg(td, "set_cloned_tls resetting idx!");
  289                         idx = 3;
  290                 }
  291 
  292                 /* this doesnt happen in practice */
  293                 if (idx == 6) {
  294                         /* we might copy out the entry_number as 3 */
  295                         info.entry_number = 3;
  296                         error = copyout(&info, desc, sizeof(struct l_user_desc));
  297                         if (error)
  298                                 linux_msg(td, "set_cloned_tls copyout failed!");
  299                 }
  300 
  301                 a[0] = LINUX_LDT_entry_a(&info);
  302                 a[1] = LINUX_LDT_entry_b(&info);
  303 
  304                 memcpy(&sd, &a, sizeof(a));
  305                 /* set %gs */
  306                 td->td_pcb->pcb_gsd = sd;
  307                 td->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL);
  308         }
  309 
  310         return (error);
  311 }
  312 
  313 int
  314 linux_set_upcall_kse(struct thread *td, register_t stack)
  315 {
  316 
  317         if (stack)
  318                 td->td_frame->tf_esp = stack;
  319 
  320         /*
  321          * The newly created Linux thread returns
  322          * to the user space by the same path that a parent do.
  323          */
  324         td->td_frame->tf_eax = 0;
  325         return (0);
  326 }
  327 
  328 int
  329 linux_mmap2(struct thread *td, struct linux_mmap2_args *args)
  330 {
  331 
  332         return (linux_mmap_common(td, args->addr, args->len, args->prot,
  333                 args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff *
  334                 PAGE_SIZE));
  335 }
  336 
  337 int
  338 linux_mmap(struct thread *td, struct linux_mmap_args *args)
  339 {
  340         int error;
  341         struct l_mmap_argv linux_args;
  342 
  343         error = copyin(args->ptr, &linux_args, sizeof(linux_args));
  344         if (error)
  345                 return (error);
  346 
  347         return (linux_mmap_common(td, linux_args.addr, linux_args.len,
  348             linux_args.prot, linux_args.flags, linux_args.fd,
  349             (uint32_t)linux_args.pgoff));
  350 }
  351 
  352 int
  353 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
  354 {
  355 
  356         return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot));
  357 }
  358 
  359 int
  360 linux_madvise(struct thread *td, struct linux_madvise_args *uap)
  361 {
  362 
  363         return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav));
  364 }
  365 
  366 int
  367 linux_ioperm(struct thread *td, struct linux_ioperm_args *args)
  368 {
  369         int error;
  370         struct i386_ioperm_args iia;
  371 
  372         iia.start = args->start;
  373         iia.length = args->length;
  374         iia.enable = args->enable;
  375         error = i386_set_ioperm(td, &iia);
  376         return (error);
  377 }
  378 
  379 int
  380 linux_iopl(struct thread *td, struct linux_iopl_args *args)
  381 {
  382         int error;
  383 
  384         if (args->level < 0 || args->level > 3)
  385                 return (EINVAL);
  386         if ((error = priv_check(td, PRIV_IO)) != 0)
  387                 return (error);
  388         if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
  389                 return (error);
  390         td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) |
  391             (args->level * (PSL_IOPL / 3));
  392         return (0);
  393 }
  394 
  395 int
  396 linux_modify_ldt(struct thread *td, struct linux_modify_ldt_args *uap)
  397 {
  398         int error;
  399         struct i386_ldt_args ldt;
  400         struct l_descriptor ld;
  401         union descriptor desc;
  402         int size, written;
  403 
  404         switch (uap->func) {
  405         case 0x00: /* read_ldt */
  406                 ldt.start = 0;
  407                 ldt.descs = uap->ptr;
  408                 ldt.num = uap->bytecount / sizeof(union descriptor);
  409                 error = i386_get_ldt(td, &ldt);
  410                 td->td_retval[0] *= sizeof(union descriptor);
  411                 break;
  412         case 0x02: /* read_default_ldt = 0 */
  413                 size = 5*sizeof(struct l_desc_struct);
  414                 if (size > uap->bytecount)
  415                         size = uap->bytecount;
  416                 for (written = error = 0; written < size && error == 0; written++)
  417                         error = subyte((char *)uap->ptr + written, 0);
  418                 td->td_retval[0] = written;
  419                 break;
  420         case 0x01: /* write_ldt */
  421         case 0x11: /* write_ldt */
  422                 if (uap->bytecount != sizeof(ld))
  423                         return (EINVAL);
  424 
  425                 error = copyin(uap->ptr, &ld, sizeof(ld));
  426                 if (error)
  427                         return (error);
  428 
  429                 ldt.start = ld.entry_number;
  430                 ldt.descs = &desc;
  431                 ldt.num = 1;
  432                 desc.sd.sd_lolimit = (ld.limit & 0x0000ffff);
  433                 desc.sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
  434                 desc.sd.sd_lobase = (ld.base_addr & 0x00ffffff);
  435                 desc.sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
  436                 desc.sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) |
  437                         (ld.contents << 2);
  438                 desc.sd.sd_dpl = 3;
  439                 desc.sd.sd_p = (ld.seg_not_present ^ 1);
  440                 desc.sd.sd_xx = 0;
  441                 desc.sd.sd_def32 = ld.seg_32bit;
  442                 desc.sd.sd_gran = ld.limit_in_pages;
  443                 error = i386_set_ldt(td, &ldt, &desc);
  444                 break;
  445         default:
  446                 error = ENOSYS;
  447                 break;
  448         }
  449 
  450         if (error == EOPNOTSUPP) {
  451                 linux_msg(td, "modify_ldt needs kernel option USER_LDT");
  452                 error = ENOSYS;
  453         }
  454 
  455         return (error);
  456 }
  457 
  458 int
  459 linux_sigaction(struct thread *td, struct linux_sigaction_args *args)
  460 {
  461         l_osigaction_t osa;
  462         l_sigaction_t act, oact;
  463         int error;
  464 
  465         if (args->nsa != NULL) {
  466                 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
  467                 if (error)
  468                         return (error);
  469                 act.lsa_handler = osa.lsa_handler;
  470                 act.lsa_flags = osa.lsa_flags;
  471                 act.lsa_restorer = osa.lsa_restorer;
  472                 LINUX_SIGEMPTYSET(act.lsa_mask);
  473                 act.lsa_mask.__mask = osa.lsa_mask;
  474         }
  475 
  476         error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL,
  477             args->osa ? &oact : NULL);
  478 
  479         if (args->osa != NULL && !error) {
  480                 osa.lsa_handler = oact.lsa_handler;
  481                 osa.lsa_flags = oact.lsa_flags;
  482                 osa.lsa_restorer = oact.lsa_restorer;
  483                 osa.lsa_mask = oact.lsa_mask.__mask;
  484                 error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
  485         }
  486 
  487         return (error);
  488 }
  489 
  490 /*
  491  * Linux has two extra args, restart and oldmask.  We dont use these,
  492  * but it seems that "restart" is actually a context pointer that
  493  * enables the signal to happen with a different register set.
  494  */
  495 int
  496 linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args)
  497 {
  498         sigset_t sigmask;
  499         l_sigset_t mask;
  500 
  501         LINUX_SIGEMPTYSET(mask);
  502         mask.__mask = args->mask;
  503         linux_to_bsd_sigset(&mask, &sigmask);
  504         return (kern_sigsuspend(td, sigmask));
  505 }
  506 
  507 int
  508 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
  509 {
  510         l_sigset_t lmask;
  511         sigset_t sigmask;
  512         int error;
  513 
  514         if (uap->sigsetsize != sizeof(l_sigset_t))
  515                 return (EINVAL);
  516 
  517         error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
  518         if (error)
  519                 return (error);
  520 
  521         linux_to_bsd_sigset(&lmask, &sigmask);
  522         return (kern_sigsuspend(td, sigmask));
  523 }
  524 
  525 int
  526 linux_pause(struct thread *td, struct linux_pause_args *args)
  527 {
  528         struct proc *p = td->td_proc;
  529         sigset_t sigmask;
  530 
  531         PROC_LOCK(p);
  532         sigmask = td->td_sigmask;
  533         PROC_UNLOCK(p);
  534         return (kern_sigsuspend(td, sigmask));
  535 }
  536 
  537 int
  538 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
  539 {
  540         stack_t ss, oss;
  541         l_stack_t lss;
  542         int error;
  543 
  544         if (uap->uss != NULL) {
  545                 error = copyin(uap->uss, &lss, sizeof(l_stack_t));
  546                 if (error)
  547                         return (error);
  548 
  549                 ss.ss_sp = lss.ss_sp;
  550                 ss.ss_size = lss.ss_size;
  551                 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags);
  552         }
  553         error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL,
  554             (uap->uoss != NULL) ? &oss : NULL);
  555         if (!error && uap->uoss != NULL) {
  556                 lss.ss_sp = oss.ss_sp;
  557                 lss.ss_size = oss.ss_size;
  558                 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
  559                 error = copyout(&lss, uap->uoss, sizeof(l_stack_t));
  560         }
  561 
  562         return (error);
  563 }
  564 
  565 int
  566 linux_set_thread_area(struct thread *td, struct linux_set_thread_area_args *args)
  567 {
  568         struct l_user_desc info;
  569         int error;
  570         int idx;
  571         int a[2];
  572         struct segment_descriptor sd;
  573 
  574         error = copyin(args->desc, &info, sizeof(struct l_user_desc));
  575         if (error)
  576                 return (error);
  577 
  578         idx = info.entry_number;
  579         /*
  580          * Semantics of Linux version: every thread in the system has array of
  581          * 3 tls descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. This
  582          * syscall loads one of the selected tls decriptors with a value and
  583          * also loads GDT descriptors 6, 7 and 8 with the content of the
  584          * per-thread descriptors.
  585          *
  586          * Semantics of FreeBSD version: I think we can ignore that Linux has 3
  587          * per-thread descriptors and use just the 1st one. The tls_array[]
  588          * is used only in set/get-thread_area() syscalls and for loading the
  589          * GDT descriptors. In FreeBSD we use just one GDT descriptor for TLS
  590          * so we will load just one.
  591          *
  592          * XXX: this doesn't work when a user space process tries to use more
  593          * than 1 TLS segment. Comment in the Linux sources says wine might do
  594          * this.
  595          */
  596 
  597         /*
  598          * we support just GLIBC TLS now
  599          * we should let 3 proceed as well because we use this segment so
  600          * if code does two subsequent calls it should succeed
  601          */
  602         if (idx != 6 && idx != -1 && idx != 3)
  603                 return (EINVAL);
  604 
  605         /*
  606          * we have to copy out the GDT entry we use
  607          * FreeBSD uses GDT entry #3 for storing %gs so load that
  608          *
  609          * XXX: what if a user space program doesn't check this value and tries
  610          * to use 6, 7 or 8?
  611          */
  612         idx = info.entry_number = 3;
  613         error = copyout(&info, args->desc, sizeof(struct l_user_desc));
  614         if (error)
  615                 return (error);
  616 
  617         if (LINUX_LDT_empty(&info)) {
  618                 a[0] = 0;
  619                 a[1] = 0;
  620         } else {
  621                 a[0] = LINUX_LDT_entry_a(&info);
  622                 a[1] = LINUX_LDT_entry_b(&info);
  623         }
  624 
  625         memcpy(&sd, &a, sizeof(a));
  626         /* this is taken from i386 version of cpu_set_user_tls() */
  627         critical_enter();
  628         /* set %gs */
  629         td->td_pcb->pcb_gsd = sd;
  630         PCPU_GET(fsgs_gdt)[1] = sd;
  631         load_gs(GSEL(GUGS_SEL, SEL_UPL));
  632         critical_exit();
  633 
  634         return (0);
  635 }
  636 
  637 int
  638 linux_get_thread_area(struct thread *td, struct linux_get_thread_area_args *args)
  639 {
  640 
  641         struct l_user_desc info;
  642         int error;
  643         int idx;
  644         struct l_desc_struct desc;
  645         struct segment_descriptor sd;
  646 
  647         error = copyin(args->desc, &info, sizeof(struct l_user_desc));
  648         if (error)
  649                 return (error);
  650 
  651         idx = info.entry_number;
  652         /* XXX: I am not sure if we want 3 to be allowed too. */
  653         if (idx != 6 && idx != 3)
  654                 return (EINVAL);
  655 
  656         idx = 3;
  657 
  658         memset(&info, 0, sizeof(info));
  659 
  660         sd = PCPU_GET(fsgs_gdt)[1];
  661 
  662         memcpy(&desc, &sd, sizeof(desc));
  663 
  664         info.entry_number = idx;
  665         info.base_addr = LINUX_GET_BASE(&desc);
  666         info.limit = LINUX_GET_LIMIT(&desc);
  667         info.seg_32bit = LINUX_GET_32BIT(&desc);
  668         info.contents = LINUX_GET_CONTENTS(&desc);
  669         info.read_exec_only = !LINUX_GET_WRITABLE(&desc);
  670         info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc);
  671         info.seg_not_present = !LINUX_GET_PRESENT(&desc);
  672         info.useable = LINUX_GET_USEABLE(&desc);
  673 
  674         error = copyout(&info, args->desc, sizeof(struct l_user_desc));
  675         if (error)
  676                 return (EFAULT);
  677 
  678         return (0);
  679 }
  680 
  681 /* XXX: this wont work with module - convert it */
  682 int
  683 linux_mq_open(struct thread *td, struct linux_mq_open_args *args)
  684 {
  685 #ifdef P1003_1B_MQUEUE
  686         return (sys_kmq_open(td, (struct kmq_open_args *)args));
  687 #else
  688         return (ENOSYS);
  689 #endif
  690 }
  691 
  692 int
  693 linux_mq_unlink(struct thread *td, struct linux_mq_unlink_args *args)
  694 {
  695 #ifdef P1003_1B_MQUEUE
  696         return (sys_kmq_unlink(td, (struct kmq_unlink_args *)args));
  697 #else
  698         return (ENOSYS);
  699 #endif
  700 }
  701 
  702 int
  703 linux_mq_timedsend(struct thread *td, struct linux_mq_timedsend_args *args)
  704 {
  705 #ifdef P1003_1B_MQUEUE
  706         return (sys_kmq_timedsend(td, (struct kmq_timedsend_args *)args));
  707 #else
  708         return (ENOSYS);
  709 #endif
  710 }
  711 
  712 int
  713 linux_mq_timedreceive(struct thread *td, struct linux_mq_timedreceive_args *args)
  714 {
  715 #ifdef P1003_1B_MQUEUE
  716         return (sys_kmq_timedreceive(td, (struct kmq_timedreceive_args *)args));
  717 #else
  718         return (ENOSYS);
  719 #endif
  720 }
  721 
  722 int
  723 linux_mq_notify(struct thread *td, struct linux_mq_notify_args *args)
  724 {
  725 #ifdef P1003_1B_MQUEUE
  726         return (sys_kmq_notify(td, (struct kmq_notify_args *)args));
  727 #else
  728         return (ENOSYS);
  729 #endif
  730 }
  731 
  732 int
  733 linux_mq_getsetattr(struct thread *td, struct linux_mq_getsetattr_args *args)
  734 {
  735 #ifdef P1003_1B_MQUEUE
  736         return (sys_kmq_setattr(td, (struct kmq_setattr_args *)args));
  737 #else
  738         return (ENOSYS);
  739 #endif
  740 }
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FreeBSD/Linux Kernel Cross Reference sys/i386/linux/linux_machdep.c

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