linux_machdep.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
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  * $FreeBSD: src/sys/i386/linux/linux_machdep.c,v 1.6.2.4 2001/11/05 19:08:23 marcel Exp $
   29  */
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/imgact.h>
   34 #include <sys/kern_syscall.h>
   35 #include <sys/lock.h>
   36 #include <sys/mman.h>
   37 #include <sys/nlookup.h>
   38 #include <sys/proc.h>
   39 #include <sys/priv.h>
   40 #include <sys/resource.h>
   41 #include <sys/resourcevar.h>
   42 #include <sys/ptrace.h>
   43 #include <sys/sysproto.h>
   44 #include <sys/thread2.h>
   45 #include <sys/unistd.h>
   46 #include <sys/wait.h>
   47 
   48 #include <machine/frame.h>
   49 #include <machine/psl.h>
   50 #include <machine/segments.h>
   51 #include <machine/sysarch.h>
   52 
   53 #include <vm/vm.h>
   54 #include <vm/pmap.h>
   55 #include <vm/vm_map.h>
   56 
   57 #include <sys/mplock2.h>
   58 
   59 #include "linux.h"
   60 #include "linux_proto.h"
   61 #include "../linux_ipc.h"
   62 #include "../linux_signal.h"
   63 #include "../linux_util.h"
   64 #include "../linux_emuldata.h"
   65 
   66 struct l_descriptor {
   67         l_uint          entry_number;
   68         l_ulong         base_addr;
   69         l_uint          limit;
   70         l_uint          seg_32bit:1;
   71         l_uint          contents:2;
   72         l_uint          read_exec_only:1;
   73         l_uint          limit_in_pages:1;
   74         l_uint          seg_not_present:1;
   75         l_uint          useable:1;
   76 };
   77 
   78 struct l_old_select_argv {
   79         l_int           nfds;
   80         l_fd_set        *readfds;
   81         l_fd_set        *writefds;
   82         l_fd_set        *exceptfds;
   83         struct l_timeval        *timeout;
   84 };
   85 
   86 int
   87 linux_to_bsd_sigaltstack(int lsa)
   88 {
   89         int bsa = 0;
   90 
   91         if (lsa & LINUX_SS_DISABLE)
   92                 bsa |= SS_DISABLE;
   93         if (lsa & LINUX_SS_ONSTACK)
   94                 bsa |= SS_ONSTACK;
   95         return (bsa);
   96 }
   97 
   98 int
   99 bsd_to_linux_sigaltstack(int bsa)
  100 {
  101         int lsa = 0;
  102 
  103         if (bsa & SS_DISABLE)
  104                 lsa |= LINUX_SS_DISABLE;
  105         if (bsa & SS_ONSTACK)
  106                 lsa |= LINUX_SS_ONSTACK;
  107         return (lsa);
  108 }
  109 
  110 /*
  111  * MPALMOSTSAFE
  112  */
  113 int
  114 sys_linux_execve(struct linux_execve_args *args)
  115 {
  116         struct nlookupdata nd;
  117         struct image_args exec_args;
  118         char *path;
  119         int error;
  120 
  121         error = linux_copyin_path(args->path, &path, LINUX_PATH_EXISTS);
  122         if (error)
  123                 return (error);
  124 #ifdef DEBUG
  125         if (ldebug(execve))
  126                 kprintf(ARGS(execve, "%s"), path);
  127 #endif
  128         get_mplock();
  129         error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
  130         bzero(&exec_args, sizeof(exec_args));
  131         if (error == 0) {
  132                 error = exec_copyin_args(&exec_args, path, PATH_SYSSPACE,
  133                                         args->argp, args->envp);
  134         }
  135         if (error == 0)
  136                 error = kern_execve(&nd, &exec_args);
  137         nlookup_done(&nd);
  138 
  139         /*
  140          * The syscall result is returned in registers to the new program.
  141          * Linux will register %edx as an atexit function and we must be
  142          * sure to set it to 0.  XXX
  143          */
  144         if (error == 0) {
  145                 args->sysmsg_result64 = 0;
  146                 if (curproc->p_sysent == &elf_linux_sysvec)
  147                         error = emuldata_init(curproc, NULL, 0);
  148         }
  149 
  150         exec_free_args(&exec_args);
  151         linux_free_path(&path);
  152 
  153         if (error < 0) {
  154                 /* We hit a lethal error condition.  Let's die now. */
  155                 exit1(W_EXITCODE(0, SIGABRT));
  156                 /* NOTREACHED */
  157         }
  158         rel_mplock();
  159 
  160         return(error);
  161 }
  162 
  163 struct l_ipc_kludge {
  164         struct l_msgbuf *msgp;
  165         l_long msgtyp;
  166 };
  167 
  168 /*
  169  * MPALMOSTSAFE
  170  */
  171 int
  172 sys_linux_ipc(struct linux_ipc_args *args)
  173 {
  174         int error = 0;
  175 
  176         get_mplock();
  177 
  178         switch (args->what & 0xFFFF) {
  179         case LINUX_SEMOP: {
  180                 struct linux_semop_args a;
  181 
  182                 a.semid = args->arg1;
  183                 a.tsops = args->ptr;
  184                 a.nsops = args->arg2;
  185                 a.sysmsg_lresult = 0;
  186                 error = linux_semop(&a);
  187                 args->sysmsg_lresult = a.sysmsg_lresult;
  188                 break;
  189         }
  190         case LINUX_SEMGET: {
  191                 struct linux_semget_args a;
  192 
  193                 a.key = args->arg1;
  194                 a.nsems = args->arg2;
  195                 a.semflg = args->arg3;
  196                 a.sysmsg_lresult = 0;
  197                 error = linux_semget(&a);
  198                 args->sysmsg_lresult = a.sysmsg_lresult;
  199                 break;
  200         }
  201         case LINUX_SEMCTL: {
  202                 struct linux_semctl_args a;
  203                 int error;
  204 
  205                 a.semid = args->arg1;
  206                 a.semnum = args->arg2;
  207                 a.cmd = args->arg3;
  208                 a.sysmsg_lresult = 0;
  209                 error = copyin((caddr_t)args->ptr, &a.arg, sizeof(a.arg));
  210                 if (error)
  211                         break;
  212                 error = linux_semctl(&a);
  213                 args->sysmsg_lresult = a.sysmsg_lresult;
  214                 break;
  215         }
  216         case LINUX_MSGSND: {
  217                 struct linux_msgsnd_args a;
  218 
  219                 a.msqid = args->arg1;
  220                 a.msgp = args->ptr;
  221                 a.msgsz = args->arg2;
  222                 a.msgflg = args->arg3;
  223                 a.sysmsg_lresult = 0;
  224                 error = linux_msgsnd(&a);
  225                 args->sysmsg_lresult = a.sysmsg_lresult;
  226                 break;
  227         }
  228         case LINUX_MSGRCV: {
  229                 struct linux_msgrcv_args a;
  230 
  231                 a.msqid = args->arg1;
  232                 a.msgsz = args->arg2;
  233                 if (a.msgsz < 0) {
  234                         error = EINVAL;
  235                         break;
  236                 }
  237                 a.msgflg = args->arg3;
  238                 a.sysmsg_lresult = 0;
  239                 if ((args->what >> 16) == 0) {
  240                         struct l_ipc_kludge tmp;
  241                         int error;
  242 
  243                         if (args->ptr == NULL) {
  244                                 error = EINVAL;
  245                                 break;
  246                         }
  247                         error = copyin((caddr_t)args->ptr, &tmp, sizeof(tmp));
  248                         if (error)
  249                                 break;
  250                         a.msgp = tmp.msgp;
  251                         a.msgtyp = tmp.msgtyp;
  252                 } else {
  253                         a.msgp = args->ptr;
  254                         a.msgtyp = args->arg5;
  255                 }
  256                 error = linux_msgrcv(&a);
  257                 args->sysmsg_lresult = a.sysmsg_lresult;
  258                 break;
  259         }
  260         case LINUX_MSGGET: {
  261                 struct linux_msgget_args a;
  262 
  263                 a.key = args->arg1;
  264                 a.msgflg = args->arg2;
  265                 a.sysmsg_lresult = 0;
  266                 error = linux_msgget(&a);
  267                 args->sysmsg_lresult = a.sysmsg_lresult;
  268                 break;
  269         }
  270         case LINUX_MSGCTL: {
  271                 struct linux_msgctl_args a;
  272 
  273                 a.msqid = args->arg1;
  274                 a.cmd = args->arg2;
  275                 a.buf = args->ptr;
  276                 a.sysmsg_lresult = 0;
  277                 error = linux_msgctl(&a);
  278                 args->sysmsg_lresult = a.sysmsg_lresult;
  279                 break;
  280         }
  281         case LINUX_SHMAT: {
  282                 struct linux_shmat_args a;
  283 
  284                 a.shmid = args->arg1;
  285                 a.shmaddr = args->ptr;
  286                 a.shmflg = args->arg2;
  287                 a.raddr = (l_ulong *)args->arg3;
  288                 a.sysmsg_lresult = 0;
  289                 error = linux_shmat(&a);
  290                 args->sysmsg_lresult = a.sysmsg_lresult;
  291                 break;
  292         }
  293         case LINUX_SHMDT: {
  294                 struct linux_shmdt_args a;
  295 
  296                 a.shmaddr = args->ptr;
  297                 a.sysmsg_lresult = 0;
  298                 error = linux_shmdt(&a);
  299                 args->sysmsg_lresult = a.sysmsg_lresult;
  300                 break;
  301         }
  302         case LINUX_SHMGET: {
  303                 struct linux_shmget_args a;
  304 
  305                 a.key = args->arg1;
  306                 a.size = args->arg2;
  307                 a.shmflg = args->arg3;
  308                 a.sysmsg_lresult = 0;
  309                 error = linux_shmget(&a);
  310                 args->sysmsg_lresult = a.sysmsg_lresult;
  311                 break;
  312         }
  313         case LINUX_SHMCTL: {
  314                 struct linux_shmctl_args a;
  315 
  316                 a.shmid = args->arg1;
  317                 a.cmd = args->arg2;
  318                 a.buf = args->ptr;
  319                 a.sysmsg_lresult = 0;
  320                 error = linux_shmctl(&a);
  321                 args->sysmsg_lresult = a.sysmsg_lresult;
  322                 break;
  323         }
  324         default:
  325                 error = EINVAL;
  326                 break;
  327         }
  328         rel_mplock();
  329         return(error);
  330 }
  331 
  332 /*
  333  * MPSAFE
  334  */
  335 int
  336 sys_linux_old_select(struct linux_old_select_args *args)
  337 {
  338         struct l_old_select_argv linux_args;
  339         struct linux_select_args newsel;
  340         int error;
  341 
  342 #ifdef DEBUG
  343         if (ldebug(old_select))
  344                 kprintf(ARGS(old_select, "%p"), args->ptr);
  345 #endif
  346 
  347         error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args));
  348         if (error)
  349                 return (error);
  350 
  351         newsel.sysmsg_iresult = 0;
  352         newsel.nfds = linux_args.nfds;
  353         newsel.readfds = linux_args.readfds;
  354         newsel.writefds = linux_args.writefds;
  355         newsel.exceptfds = linux_args.exceptfds;
  356         newsel.timeout = linux_args.timeout;
  357         error = sys_linux_select(&newsel);
  358         args->sysmsg_iresult = newsel.sysmsg_iresult;
  359         return(error);
  360 }
  361 
  362 /*
  363  * MPSAFE
  364  */
  365 int
  366 sys_linux_fork(struct linux_fork_args *args)
  367 {
  368         struct lwp *lp = curthread->td_lwp;
  369         struct proc *p2;
  370         int error;
  371 
  372         get_mplock();
  373         error = fork1(lp, RFFDG | RFPROC | RFPGLOCK, &p2);
  374         if (error == 0) {
  375                 emuldata_init(curproc, p2, 0);
  376 
  377                 start_forked_proc(lp, p2);
  378                 args->sysmsg_fds[0] = p2->p_pid;
  379                 args->sysmsg_fds[1] = 0;
  380         }
  381         rel_mplock();
  382 
  383         /* Are we the child? */
  384         if (args->sysmsg_iresult == 1)
  385                 args->sysmsg_iresult = 0;
  386 
  387         return (error);
  388 }
  389 
  390 /*
  391  * MPALMOSTSAFE
  392  */
  393 int
  394 sys_linux_exit_group(struct linux_exit_group_args *args)
  395 {
  396         struct linux_emuldata *em, *e;
  397         struct proc *p;
  398         int rval;
  399 
  400         rval = args->rval;
  401         EMUL_LOCK();
  402 
  403         em = emuldata_get(curproc);
  404 
  405         if (em->s->refs == 1) {
  406                 EMUL_UNLOCK();
  407                 exit1(W_EXITCODE(rval, 0));
  408                 /* NOTREACHED */
  409                 return (0);
  410         }
  411         KKASSERT(em->proc == curproc);
  412         em->flags |= EMUL_DIDKILL;
  413         em->s->flags |= LINUX_LES_INEXITGROUP;
  414         em->s->xstat = W_EXITCODE(rval, 0);
  415 
  416         LIST_REMOVE(em, threads);
  417         LIST_INSERT_HEAD(&em->s->threads, em, threads);
  418 
  419         while ((e = LIST_NEXT(em, threads)) != NULL) {
  420                 LIST_REMOVE(em, threads);
  421                 LIST_INSERT_AFTER(e, em, threads);
  422                 if ((e->flags & EMUL_DIDKILL) == 0) {
  423                         e->flags |= EMUL_DIDKILL;
  424                         p = e->proc;
  425                         PHOLD(p);
  426                         ksignal(p, SIGKILL);
  427                         PRELE(p);
  428                 }
  429         }
  430 
  431         EMUL_UNLOCK();
  432         exit1(W_EXITCODE(rval, 0));
  433         /* NOTREACHED */
  434 
  435         return (0);
  436 }
  437 
  438 /*
  439  * MPSAFE
  440  */
  441 int
  442 sys_linux_vfork(struct linux_vfork_args *args)
  443 {
  444         struct lwp *lp = curthread->td_lwp;
  445         struct proc *p2;
  446         int error;
  447 
  448         get_mplock();
  449         error = fork1(lp, RFFDG | RFPROC | RFPPWAIT | RFMEM | RFPGLOCK, &p2);
  450         if (error == 0) {
  451                 emuldata_init(curproc, p2, 0);
  452 
  453                 start_forked_proc(lp, p2);
  454                 args->sysmsg_fds[0] = p2->p_pid;
  455                 args->sysmsg_fds[1] = 0;
  456         }
  457         rel_mplock();
  458 
  459         if (args->sysmsg_iresult == 1)
  460                 args->sysmsg_iresult = 0;
  461 
  462         return (error);
  463 }
  464 
  465 /*
  466  * MPALMOSTSAFE
  467  */
  468 int
  469 sys_linux_clone(struct linux_clone_args *args)
  470 {
  471         struct segment_descriptor *desc;
  472         struct l_user_desc info;
  473         int idx;
  474         int a[2];
  475 
  476         struct lwp *lp = curthread->td_lwp;
  477         int error, ff = RFPROC;
  478         struct proc *p2 = NULL;
  479         int exit_signal;
  480 
  481         exit_signal = args->flags & 0x000000ff;
  482         if (exit_signal >= LINUX_NSIG)
  483                 return (EINVAL);
  484         if (exit_signal <= LINUX_SIGTBLSZ)
  485                 exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)];
  486 
  487         if (args->flags & LINUX_CLONE_VM)
  488                 ff |= RFMEM;
  489         if (args->flags & LINUX_CLONE_SIGHAND)
  490                 ff |= RFSIGSHARE;
  491         if (!(args->flags & (LINUX_CLONE_FILES | LINUX_CLONE_FS)))
  492                 ff |= RFFDG;
  493         if ((args->flags & 0xffffff00) == LINUX_THREADING_FLAGS)
  494                 ff |= RFTHREAD;
  495         if (args->flags & LINUX_CLONE_VFORK)
  496                 ff |= RFPPWAIT;
  497         if (args->flags & LINUX_CLONE_PARENT_SETTID) {
  498                 if (args->parent_tidptr == NULL)
  499                         return (EINVAL);
  500         }
  501 
  502         error = 0;
  503 
  504         get_mplock();
  505         error = fork1(lp, ff | RFPGLOCK, &p2);
  506         if (error) {
  507                 rel_mplock();
  508                 return error;
  509         }
  510 
  511         args->sysmsg_fds[0] = p2 ? p2->p_pid : 0;
  512         args->sysmsg_fds[1] = 0;
  513         
  514         if (args->flags & (LINUX_CLONE_PARENT | LINUX_CLONE_THREAD)) {
  515                 lwkt_gettoken(&curproc->p_token);
  516                 while (p2->p_pptr != curproc->p_pptr)
  517                         proc_reparent(p2, curproc->p_pptr);
  518                 lwkt_reltoken(&curproc->p_token);
  519         }
  520 
  521         emuldata_init(curproc, p2, args->flags);
  522         linux_proc_fork(p2, curproc, args->child_tidptr);
  523         /*
  524          * XXX: this can't happen, p2 is never NULL, or else we'd have
  525          *      other problems, too (see p2->p_sigparent == ...,
  526          *      linux_proc_fork and emuldata_init.
  527          */
  528         if (p2 == NULL) {
  529                 error = ESRCH;
  530         } else {
  531                 if (args->flags & LINUX_CLONE_PARENT_SETTID) {
  532                         error = copyout(&p2->p_pid, args->parent_tidptr, sizeof(p2->p_pid));
  533                 }
  534         }
  535 
  536         p2->p_sigparent = exit_signal;
  537         if (args->stack) {
  538                 ONLY_LWP_IN_PROC(p2)->lwp_md.md_regs->tf_esp =
  539                                         (unsigned long)args->stack;
  540         }
  541 
  542         if (args->flags & LINUX_CLONE_SETTLS) {
  543                 error = copyin((void *)curthread->td_lwp->lwp_md.md_regs->tf_esi, &info, sizeof(struct l_user_desc));
  544                 if (error) {
  545                         kprintf("copyin of tf_esi to info failed\n");
  546                 } else {
  547                         idx = info.entry_number;
  548                         /*
  549                          * We understand both our own entries such as the ones
  550                          * we provide on linux_set_thread_area, as well as the
  551                          * linux-type entries 6-8.
  552                          */
  553                         if ((idx < 6 || idx > 8) && (idx < GTLS_START)) {
  554                                 kprintf("LINUX_CLONE_SETTLS, invalid idx requested: %d\n", idx);
  555                                 goto out;
  556                         }
  557                         if (idx < GTLS_START) {
  558                                 idx -= 6;
  559                         } else {
  560 #if 0 /* was SMP */
  561                                 idx -= (GTLS_START + mycpu->gd_cpuid * NGDT);
  562 #endif
  563                                 idx -= GTLS_START;
  564                         }
  565                         KKASSERT(idx >= 0);
  566 
  567                         a[0] = LINUX_LDT_entry_a(&info);
  568                         a[1] = LINUX_LDT_entry_b(&info);
  569                         if (p2) {
  570                                 desc = &FIRST_LWP_IN_PROC(p2)->lwp_thread->td_tls.tls[idx];
  571                                 memcpy(desc, &a, sizeof(a));
  572                         } else {
  573                                 kprintf("linux_clone... we don't have a p2\n");
  574                         }
  575                 }
  576         }
  577 out:
  578         if (p2)
  579                 start_forked_proc(lp, p2);
  580 
  581         rel_mplock();
  582 #ifdef DEBUG
  583         if (ldebug(clone))
  584                 kprintf(LMSG("clone: successful rfork to %ld"),
  585                     (long)p2->p_pid);
  586 #endif
  587 
  588         return (error);
  589 }
  590 
  591 /* XXX move */
  592 struct l_mmap_argv {
  593         l_caddr_t       addr;
  594         l_int           len;
  595         l_int           prot;
  596         l_int           flags;
  597         l_int           fd;
  598         l_int           pos;
  599 };
  600 
  601 #define STACK_SIZE  (2 * 1024 * 1024)
  602 #define GUARD_SIZE  (4 * PAGE_SIZE)
  603 
  604 /*
  605  * MPALMOSTSAFE
  606  */
  607 static int
  608 linux_mmap_common(caddr_t linux_addr, size_t linux_len, int linux_prot,
  609                   int linux_flags, int linux_fd, off_t pos, void **res)
  610 {
  611         struct thread *td = curthread;
  612         struct proc *p = td->td_proc;
  613         caddr_t addr;
  614         void *new;
  615         int error, flags, len, prot, fd;
  616 
  617         flags = 0;
  618         if (linux_flags & LINUX_MAP_SHARED)
  619                 flags |= MAP_SHARED;
  620         if (linux_flags & LINUX_MAP_PRIVATE)
  621                 flags |= MAP_PRIVATE;
  622         if (linux_flags & LINUX_MAP_FIXED)
  623                 flags |= MAP_FIXED;
  624         if (linux_flags & LINUX_MAP_ANON) {
  625                 flags |= MAP_ANON;
  626         } else {
  627                 flags |= MAP_NOSYNC;
  628         }
  629 
  630         lwkt_gettoken(&curproc->p_vmspace->vm_map.token);
  631 
  632         if (linux_flags & LINUX_MAP_GROWSDOWN) {
  633                 flags |= MAP_STACK;
  634                 /* The linux MAP_GROWSDOWN option does not limit auto
  635                  * growth of the region.  Linux mmap with this option
  636                  * takes as addr the inital BOS, and as len, the initial
  637                  * region size.  It can then grow down from addr without
  638                  * limit.  However, linux threads has an implicit internal
  639                  * limit to stack size of STACK_SIZE.  Its just not
  640                  * enforced explicitly in linux.  But, here we impose
  641                  * a limit of (STACK_SIZE - GUARD_SIZE) on the stack
  642                  * region, since we can do this with our mmap.
  643                  *
  644                  * Our mmap with MAP_STACK takes addr as the maximum
  645                  * downsize limit on BOS, and as len the max size of
  646                  * the region.  It them maps the top SGROWSIZ bytes,
  647                  * and autgrows the region down, up to the limit
  648                  * in addr.
  649                  *
  650                  * If we don't use the MAP_STACK option, the effect
  651                  * of this code is to allocate a stack region of a
  652                  * fixed size of (STACK_SIZE - GUARD_SIZE).
  653                  */
  654 
  655                 /* This gives us TOS */
  656                 addr = linux_addr + linux_len;
  657 
  658                 if (addr > p->p_vmspace->vm_maxsaddr) {
  659                         /* Some linux apps will attempt to mmap
  660                          * thread stacks near the top of their
  661                          * address space.  If their TOS is greater
  662                          * than vm_maxsaddr, vm_map_growstack()
  663                          * will confuse the thread stack with the
  664                          * process stack and deliver a SEGV if they
  665                          * attempt to grow the thread stack past their
  666                          * current stacksize rlimit.  To avoid this,
  667                          * adjust vm_maxsaddr upwards to reflect
  668                          * the current stacksize rlimit rather
  669                          * than the maximum possible stacksize.
  670                          * It would be better to adjust the
  671                          * mmap'ed region, but some apps do not check
  672                          * mmap's return value.
  673                          */
  674                         p->p_vmspace->vm_maxsaddr = (char *)USRSTACK -
  675                             p->p_rlimit[RLIMIT_STACK].rlim_cur;
  676                 }
  677 
  678                 /* This gives us our maximum stack size */
  679                 if (linux_len > STACK_SIZE - GUARD_SIZE) {
  680                         len = linux_len;
  681                 } else {
  682                         len = STACK_SIZE - GUARD_SIZE;
  683                 }
  684                 /* This gives us a new BOS.  If we're using VM_STACK, then
  685                  * mmap will just map the top SGROWSIZ bytes, and let
  686                  * the stack grow down to the limit at BOS.  If we're
  687                  * not using VM_STACK we map the full stack, since we
  688                  * don't have a way to autogrow it.
  689                  */
  690                 addr -= len;
  691         } else {
  692                 addr = linux_addr;
  693                 len = linux_len;
  694         }
  695 
  696         prot = linux_prot;
  697 
  698         if (prot & (PROT_READ | PROT_WRITE | PROT_EXEC))
  699                 prot |= PROT_READ | PROT_EXEC;
  700 
  701         if (linux_flags & LINUX_MAP_ANON) {
  702                 fd = -1;
  703         } else {
  704                 fd = linux_fd;
  705         }
  706         
  707 #ifdef DEBUG
  708         if (ldebug(mmap) || ldebug(mmap2))
  709                 kprintf("-> (%p, %d, %d, 0x%08x, %d, %lld)\n",
  710                     addr, len, prot, flags, fd, pos);
  711 #endif
  712         error = kern_mmap(curproc->p_vmspace, addr, len,
  713                           prot, flags, fd, pos, &new);
  714 
  715         lwkt_reltoken(&curproc->p_vmspace->vm_map.token);
  716 
  717         if (error == 0)
  718                 *res = new;
  719         return (error);
  720 }
  721 
  722 /*
  723  * MPSAFE
  724  */
  725 int
  726 sys_linux_mmap(struct linux_mmap_args *args)
  727 {
  728         struct l_mmap_argv linux_args;
  729         int error;
  730 
  731         error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args));
  732         if (error)
  733                 return (error);
  734 
  735 #ifdef DEBUG
  736         if (ldebug(mmap))
  737                 kprintf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"),
  738                     (void *)linux_args.addr, linux_args.len, linux_args.prot,
  739                     linux_args.flags, linux_args.fd, linux_args.pos);
  740 #endif
  741         error = linux_mmap_common(linux_args.addr, linux_args.len,
  742             linux_args.prot, linux_args.flags, linux_args.fd,
  743             linux_args.pos, &args->sysmsg_resultp);
  744 #ifdef DEBUG
  745         if (ldebug(mmap))
  746                 kprintf("-> %p\n", args->sysmsg_resultp);
  747 #endif
  748         return(error);
  749 }
  750 
  751 /*
  752  * MPSAFE
  753  */
  754 int
  755 sys_linux_mmap2(struct linux_mmap2_args *args)
  756 {
  757         int error;
  758 
  759 #ifdef DEBUG
  760         if (ldebug(mmap2))
  761                 kprintf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"),
  762                     (void *)args->addr, args->len, args->prot, args->flags,
  763                     args->fd, args->pgoff);
  764 #endif
  765         error = linux_mmap_common((void *)args->addr, args->len, args->prot,
  766             args->flags, args->fd, args->pgoff * PAGE_SIZE,
  767             &args->sysmsg_resultp);
  768 #ifdef DEBUG
  769         if (ldebug(mmap2))
  770                 kprintf("-> %p\n", args->sysmsg_resultp);
  771 #endif
  772         return (error);
  773 }
  774 
  775 /*
  776  * MPSAFE
  777  */
  778 int
  779 sys_linux_pipe(struct linux_pipe_args *args)
  780 {
  781         int error;
  782         int reg_edx;
  783         struct pipe_args bsd_args;
  784 
  785 #ifdef DEBUG
  786         if (ldebug(pipe))
  787                 kprintf(ARGS(pipe, "*"));
  788 #endif
  789 
  790         reg_edx = args->sysmsg_fds[1];
  791         error = sys_pipe(&bsd_args);
  792         if (error) {
  793                 args->sysmsg_fds[1] = reg_edx;
  794                 return (error);
  795         }
  796 
  797         error = copyout(bsd_args.sysmsg_fds, args->pipefds, 2*sizeof(int));
  798         if (error) {
  799                 args->sysmsg_fds[1] = reg_edx;
  800                 return (error);
  801         }
  802 
  803         args->sysmsg_fds[1] = reg_edx;
  804         args->sysmsg_fds[0] = 0;
  805         return (0);
  806 }
  807 
  808 /*
  809  * XXX: Preliminary
  810  */
  811 int
  812 sys_linux_pipe2(struct linux_pipe2_args *args)
  813 {
  814         struct thread *td = curthread;
  815         int error;
  816         int reg_edx;
  817         struct pipe_args bsd_args;
  818         union fcntl_dat dat;
  819 
  820         reg_edx = args->sysmsg_fds[1];
  821         error = sys_pipe(&bsd_args);
  822         if (error) {
  823                 args->sysmsg_fds[1] = reg_edx;
  824                 return (error);
  825         }
  826 
  827 //      if (args->flags & LINUX_O_CLOEXEC) {
  828 //      }
  829 
  830         if (args->flags & LINUX_O_NONBLOCK) {
  831                 dat.fc_flags = O_NONBLOCK;
  832                 kern_fcntl(bsd_args.sysmsg_fds[0], F_SETFL, &dat, td->td_ucred);
  833                 kern_fcntl(bsd_args.sysmsg_fds[1], F_SETFL, &dat, td->td_ucred);
  834         }
  835 
  836         error = copyout(bsd_args.sysmsg_fds, args->pipefds, 2*sizeof(int));
  837         if (error) {
  838                 args->sysmsg_fds[1] = reg_edx;
  839                 return (error);
  840         }
  841 
  842         args->sysmsg_fds[1] = reg_edx;
  843         args->sysmsg_fds[0] = 0;
  844         return (0);
  845 }
  846 
  847 /*
  848  * MPSAFE
  849  */
  850 int
  851 sys_linux_ioperm(struct linux_ioperm_args *args)
  852 {
  853         struct sysarch_args sa;
  854         struct i386_ioperm_args *iia;
  855         caddr_t sg;
  856         int error;
  857 
  858         sg = stackgap_init();
  859         iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args));
  860         iia->start = args->start;
  861         iia->length = args->length;
  862         iia->enable = args->enable;
  863         sa.sysmsg_resultp = NULL;
  864         sa.op = I386_SET_IOPERM;
  865         sa.parms = (char *)iia;
  866         error = sys_sysarch(&sa);
  867         args->sysmsg_resultp = sa.sysmsg_resultp;
  868         return(error);
  869 }
  870 
  871 /*
  872  * MPSAFE
  873  */
  874 int
  875 sys_linux_iopl(struct linux_iopl_args *args)
  876 {
  877         struct thread *td = curthread;
  878         struct lwp *lp = td->td_lwp;
  879         int error;
  880 
  881         if (args->level < 0 || args->level > 3)
  882                 return (EINVAL);
  883         if ((error = priv_check(td, PRIV_ROOT)) != 0)
  884                 return (error);
  885         if (securelevel > 0)
  886                 return (EPERM);
  887         lp->lwp_md.md_regs->tf_eflags =
  888             (lp->lwp_md.md_regs->tf_eflags & ~PSL_IOPL) |
  889             (args->level * (PSL_IOPL / 3));
  890         return (0);
  891 }
  892 
  893 /*
  894  * MPSAFE
  895  */
  896 int
  897 sys_linux_modify_ldt(struct linux_modify_ldt_args *uap)
  898 {
  899         int error;
  900         caddr_t sg;
  901         struct sysarch_args args;
  902         struct i386_ldt_args *ldt;
  903         struct l_descriptor ld;
  904         union descriptor *desc;
  905         int size, written;
  906 
  907         sg = stackgap_init();
  908 
  909         if (uap->ptr == NULL)
  910                 return (EINVAL);
  911 
  912         switch (uap->func) {
  913         case 0x00: /* read_ldt */
  914                 ldt = stackgap_alloc(&sg, sizeof(*ldt));
  915                 ldt->start = 0;
  916                 ldt->descs = uap->ptr;
  917                 ldt->num = uap->bytecount / sizeof(union descriptor);
  918                 args.op = I386_GET_LDT;
  919                 args.parms = (char*)ldt;
  920                 args.sysmsg_iresult = 0;
  921                 error = sys_sysarch(&args);
  922                 uap->sysmsg_iresult = args.sysmsg_iresult *
  923                                       sizeof(union descriptor);
  924                 break;
  925         case 0x02: /* read_default_ldt = 0 */
  926                 size = 5*sizeof(struct l_desc_struct);
  927                 if (size > uap->bytecount)
  928                         size = uap->bytecount;
  929                 for (written = error = 0; written < size && error == 0; written++)
  930                         error = subyte((char *)uap->ptr + written, 0);
  931                 uap->sysmsg_iresult = written;
  932                 break;
  933         case 0x01: /* write_ldt */
  934         case 0x11: /* write_ldt */
  935                 if (uap->bytecount != sizeof(ld))
  936                         return (EINVAL);
  937 
  938                 error = copyin(uap->ptr, &ld, sizeof(ld));
  939                 if (error)
  940                         return (error);
  941 
  942                 ldt = stackgap_alloc(&sg, sizeof(*ldt));
  943                 desc = stackgap_alloc(&sg, sizeof(*desc));
  944                 ldt->start = ld.entry_number;
  945                 ldt->descs = desc;
  946                 ldt->num = 1;
  947                 desc->sd.sd_lolimit = (ld.limit & 0x0000ffff);
  948                 desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
  949                 desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff);
  950                 desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
  951                 desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) |
  952                         (ld.contents << 2);
  953                 desc->sd.sd_dpl = 3;
  954                 desc->sd.sd_p = (ld.seg_not_present ^ 1);
  955                 desc->sd.sd_xx = 0;
  956                 desc->sd.sd_def32 = ld.seg_32bit;
  957                 desc->sd.sd_gran = ld.limit_in_pages;
  958                 args.op = I386_SET_LDT;
  959                 args.parms = (char*)ldt;
  960                 args.sysmsg_iresult = 0;
  961                 error = sys_sysarch(&args);
  962                 uap->sysmsg_iresult = args.sysmsg_iresult;
  963                 break;
  964         default:
  965                 error = EINVAL;
  966                 break;
  967         }
  968 
  969         return (error);
  970 }
  971 
  972 /*
  973  * MPALMOSTSAFE
  974  */
  975 int
  976 sys_linux_sigaction(struct linux_sigaction_args *args)
  977 {
  978         l_osigaction_t osa;
  979         l_sigaction_t linux_act, linux_oact;
  980         struct sigaction act, oact;
  981         int error, sig;
  982 
  983 #ifdef DEBUG
  984         if (ldebug(sigaction))
  985                 kprintf(ARGS(sigaction, "%d, %p, %p"),
  986                     args->sig, (void *)args->nsa, (void *)args->osa);
  987 #endif
  988 
  989         if (args->nsa) {
  990                 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
  991                 if (error)
  992                         return (error);
  993                 linux_act.lsa_handler = osa.lsa_handler;
  994                 linux_act.lsa_flags = osa.lsa_flags;
  995                 linux_act.lsa_restorer = osa.lsa_restorer;
  996                 LINUX_SIGEMPTYSET(linux_act.lsa_mask);
  997                 linux_act.lsa_mask.__bits[0] = osa.lsa_mask;
  998                 linux_to_bsd_sigaction(&linux_act, &act);
  999         }
 1000 
 1001         if (args->sig <= LINUX_SIGTBLSZ)
 1002                 sig = linux_to_bsd_signal[_SIG_IDX(args->sig)];
 1003         else
 1004                 sig = args->sig;
 1005 
 1006         get_mplock();
 1007         error = kern_sigaction(sig, args->nsa ? &act : NULL,
 1008                                args->osa ? &oact : NULL);
 1009         rel_mplock();
 1010 
 1011         if (args->osa != NULL && !error) {
 1012                 bsd_to_linux_sigaction(&oact, &linux_oact);
 1013                 osa.lsa_handler = linux_oact.lsa_handler;
 1014                 osa.lsa_flags = linux_oact.lsa_flags;
 1015                 osa.lsa_restorer = linux_oact.lsa_restorer;
 1016                 osa.lsa_mask = linux_oact.lsa_mask.__bits[0];
 1017                 error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
 1018         }
 1019         return (error);
 1020 }
 1021 
 1022 /*
 1023  * Linux has two extra args, restart and oldmask.  We dont use these,
 1024  * but it seems that "restart" is actually a context pointer that
 1025  * enables the signal to happen with a different register set.
 1026  *
 1027  * MPALMOSTSAFE
 1028  */
 1029 int
 1030 sys_linux_sigsuspend(struct linux_sigsuspend_args *args)
 1031 {
 1032         l_sigset_t linux_mask;
 1033         sigset_t mask;
 1034         int error;
 1035 
 1036 #ifdef DEBUG
 1037         if (ldebug(sigsuspend))
 1038                 kprintf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
 1039 #endif
 1040 
 1041         LINUX_SIGEMPTYSET(mask);
 1042         mask.__bits[0] = args->mask;
 1043         linux_to_bsd_sigset(&linux_mask, &mask);
 1044 
 1045         get_mplock();
 1046         error = kern_sigsuspend(&mask);
 1047         rel_mplock();
 1048 
 1049         return(error);
 1050 }
 1051 
 1052 /*
 1053  * MPALMOSTSAFE
 1054  */
 1055 int
 1056 sys_linux_rt_sigsuspend(struct linux_rt_sigsuspend_args *uap)
 1057 {
 1058         l_sigset_t linux_mask;
 1059         sigset_t mask;
 1060         int error;
 1061 
 1062 #ifdef DEBUG
 1063         if (ldebug(rt_sigsuspend))
 1064                 kprintf(ARGS(rt_sigsuspend, "%p, %d"),
 1065                     (void *)uap->newset, uap->sigsetsize);
 1066 #endif
 1067 
 1068         if (uap->sigsetsize != sizeof(l_sigset_t))
 1069                 return (EINVAL);
 1070 
 1071         error = copyin(uap->newset, &linux_mask, sizeof(l_sigset_t));
 1072         if (error)
 1073                 return (error);
 1074 
 1075         linux_to_bsd_sigset(&linux_mask, &mask);
 1076 
 1077         get_mplock();
 1078         error = kern_sigsuspend(&mask);
 1079         rel_mplock();
 1080 
 1081         return(error);
 1082 }
 1083 
 1084 /*
 1085  * MPALMOSTSAFE
 1086  */
 1087 int
 1088 sys_linux_pause(struct linux_pause_args *args)
 1089 {
 1090         struct thread *td = curthread;
 1091         struct lwp *lp = td->td_lwp;
 1092         sigset_t mask;
 1093         int error;
 1094 
 1095 #ifdef DEBUG
 1096         if (ldebug(pause))
 1097                 kprintf(ARGS(pause, ""));
 1098 #endif
 1099 
 1100         mask = lp->lwp_sigmask;
 1101 
 1102         get_mplock();
 1103         error = kern_sigsuspend(&mask);
 1104         rel_mplock();
 1105 
 1106         return(error);
 1107 }
 1108 
 1109 /*
 1110  * MPALMOSTSAFE
 1111  */
 1112 int
 1113 sys_linux_sigaltstack(struct linux_sigaltstack_args *uap)
 1114 {
 1115         stack_t ss, oss;
 1116         l_stack_t linux_ss;
 1117         int error;
 1118 
 1119 #ifdef DEBUG
 1120         if (ldebug(sigaltstack))
 1121                 kprintf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
 1122 #endif
 1123 
 1124         if (uap->uss) {
 1125                 error = copyin(uap->uss, &linux_ss, sizeof(l_stack_t));
 1126                 if (error)
 1127                         return (error);
 1128 
 1129                 ss.ss_sp = linux_ss.ss_sp;
 1130                 ss.ss_size = linux_ss.ss_size;
 1131                 ss.ss_flags = linux_to_bsd_sigaltstack(linux_ss.ss_flags);
 1132         }
 1133 
 1134         get_mplock();
 1135         error = kern_sigaltstack(uap->uss ? &ss : NULL,
 1136                                  uap->uoss ? &oss : NULL);
 1137         rel_mplock();
 1138 
 1139         if (error == 0 && uap->uoss) {
 1140                 linux_ss.ss_sp = oss.ss_sp;
 1141                 linux_ss.ss_size = oss.ss_size;
 1142                 linux_ss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
 1143                 error = copyout(&linux_ss, uap->uoss, sizeof(l_stack_t));
 1144         }
 1145 
 1146         return (error);
 1147 }
 1148 
 1149 int
 1150 sys_linux_set_thread_area(struct linux_set_thread_area_args *args)
 1151 {
 1152         struct segment_descriptor *desc;
 1153         struct l_user_desc info;
 1154         int error;
 1155         int idx;
 1156         int a[2];
 1157         int i;
 1158 
 1159         error = copyin(args->desc, &info, sizeof(struct l_user_desc));
 1160         if (error)
 1161                 return (EFAULT);
 1162 
 1163 #ifdef DEBUG
 1164         if (ldebug(set_thread_area))
 1165                 kprintf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"),
 1166                       info.entry_number,
 1167                       info.base_addr,
 1168                       info.limit,
 1169                       info.seg_32bit,
 1170                       info.contents,
 1171                       info.read_exec_only,
 1172                       info.limit_in_pages,
 1173                       info.seg_not_present,
 1174                       info.useable);
 1175 #endif
 1176 
 1177         idx = info.entry_number;
 1178         if (idx != -1 && (idx < 6 || idx > 8))
 1179                 return (EINVAL);
 1180 
 1181         if (idx == -1) {
 1182                 /* -1 means finding the first free TLS entry */
 1183                 for (i = 0; i < NGTLS; i++) {
 1184                         /*
 1185                          * try to determine if the TLS entry is empty by looking
 1186                          * at the lolimit entry.
 1187                          */
 1188                         if (curthread->td_tls.tls[idx].sd_lolimit == 0) {
 1189                                 idx = i;
 1190                                 break;
 1191                         }
 1192                 }
 1193 
 1194                 if (idx == -1) {
 1195                         /*
 1196                          * By now we should have an index. If not, it means
 1197                          * that no entry is free, so return ESRCH.
 1198                          */
 1199                         return (ESRCH);
 1200                 }
 1201         } else {
 1202                 /* translate the index from Linux to ours */
 1203                 idx -= 6;
 1204                 KKASSERT(idx >= 0);
 1205         }
 1206 
 1207         /* Tell the caller about the allocated entry number */
 1208 #if 0 /* was SMP */
 1209         info.entry_number = GTLS_START + mycpu->gd_cpuid * NGDT + idx;
 1210 #endif
 1211         info.entry_number = GTLS_START + idx;
 1212 
 1213 
 1214         error = copyout(&info, args->desc, sizeof(struct l_user_desc));
 1215         if (error)
 1216                 return (error);
 1217 
 1218         if (LINUX_LDT_empty(&info)) {
 1219                 a[0] = 0;
 1220                 a[1] = 0;
 1221         } else {
 1222                 a[0] = LINUX_LDT_entry_a(&info);
 1223                 a[1] = LINUX_LDT_entry_b(&info);
 1224         }
 1225 
 1226         /*
 1227          * Update the TLS and the TLS entries in the GDT, but hold a critical
 1228          * section as required by set_user_TLS().
 1229          */
 1230         crit_enter();
 1231         desc = &curthread->td_tls.tls[idx];
 1232         memcpy(desc, &a, sizeof(a));
 1233         set_user_TLS();
 1234         crit_exit();
 1235 
 1236         return (0);
 1237 }
 1238 
 1239 int
 1240 sys_linux_get_thread_area(struct linux_get_thread_area_args *args)
 1241 {
 1242         struct segment_descriptor *sd;
 1243         struct l_desc_struct desc;
 1244         struct l_user_desc info;
 1245         int error;
 1246         int idx;
 1247 
 1248 #ifdef DEBUG
 1249         if (ldebug(get_thread_area))
 1250                 kprintf(ARGS(get_thread_area, "%p"), args->desc);
 1251 #endif
 1252 
 1253         error = copyin(args->desc, &info, sizeof(struct l_user_desc));
 1254         if (error)
 1255                 return (EFAULT);
 1256                 
 1257         idx = info.entry_number;
 1258         if ((idx < 6 || idx > 8) && (idx < GTLS_START)) {
 1259                 kprintf("sys_linux_get_thread_area, invalid idx requested: %d\n", idx);
 1260                 return (EINVAL);
 1261         }
 1262 
 1263         memset(&info, 0, sizeof(info));
 1264 
 1265         /* translate the index from Linux to ours */
 1266         info.entry_number = idx;
 1267         if (idx < GTLS_START) {
 1268                 idx -= 6;
 1269         } else {
 1270 #if 0 /* was SMP */
 1271                 idx -= (GTLS_START + mycpu->gd_cpuid * NGDT);
 1272 #endif
 1273                 idx -= GTLS_START;
 1274 
 1275         }
 1276         KKASSERT(idx >= 0);
 1277 
 1278         sd = &curthread->td_tls.tls[idx];
 1279         memcpy(&desc, sd, sizeof(desc));
 1280         info.base_addr = LINUX_GET_BASE(&desc);
 1281         info.limit = LINUX_GET_LIMIT(&desc);
 1282         info.seg_32bit = LINUX_GET_32BIT(&desc);
 1283         info.contents = LINUX_GET_CONTENTS(&desc);
 1284         info.read_exec_only = !LINUX_GET_WRITABLE(&desc);
 1285         info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc);
 1286         info.seg_not_present = !LINUX_GET_PRESENT(&desc);
 1287         info.useable = LINUX_GET_USEABLE(&desc);
 1288 
 1289         error = copyout(&info, args->desc, sizeof(struct l_user_desc));
 1290         if (error)
 1291                 return (EFAULT);
 1292 
 1293         return (0);
 1294 }
Cache object: 777ce309b1512c0910f32baad5383170
[ 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.
FreeBSD/Linux Kernel Cross Reference sys/emulation/linux/i386/linux_machdep.c

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