bsd/kern/bsd_init.c

   1 /*
   2  * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  *
  28  *
  29  * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  * (c) UNIX System Laboratories, Inc.
  32  * All or some portions of this file are derived from material licensed
  33  * to the University of California by American Telephone and Telegraph
  34  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  35  * the permission of UNIX System Laboratories, Inc.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  *      @(#)init_main.c 8.16 (Berkeley) 5/14/95
  66  */
  67
  68 /*
  69  *
  70  * Mach Operating System
  71  * Copyright (c) 1987 Carnegie-Mellon University
  72  * All rights reserved.  The CMU software License Agreement specifies
  73  * the terms and conditions for use and redistribution.
  74  */
  75 /*
  76  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
  77  * support for mandatory and extensible security protections.  This notice
  78  * is included in support of clause 2.2 (b) of the Apple Public License,
  79  * Version 2.0.
  80  */
  81
  82 #include <sys/param.h>
  83 #include <sys/filedesc.h>
  84 #include <sys/kernel.h>
  85 #include <sys/mount_internal.h>
  86 #include <sys/proc_internal.h>
  87 #include <sys/kauth.h>
  88 #include <sys/systm.h>
  89 #include <sys/vnode_internal.h>
  90 #include <sys/conf.h>
  91 #include <sys/buf_internal.h>
  92 #include <sys/clist.h>
  93 #include <sys/user.h>
  94 #include <sys/time.h>
  95 #include <sys/systm.h>
  96 #include <sys/mman.h>
  97
  98 #include <security/audit/audit.h>
  99
 100 #include <sys/malloc.h>
 101 #include <sys/dkstat.h>
 102 #include <sys/codesign.h>
 103
 104 #include <kern/startup.h>
 105 #include <kern/thread.h>
 106 #include <kern/task.h>
 107 #include <kern/ast.h>
 108 #include <kern/kalloc.h>
 109 #include <mach/mach_host.h>
 110
 111 #include <mach/vm_param.h>
 112
 113 #include <vm/vm_map.h>
 114 #include <vm/vm_kern.h>
 115
 116 #include <sys/ux_exception.h>   /* for ux_exception_port */
 117
 118 #include <sys/reboot.h>
 119 #include <mach/exception_types.h>
 120 #include <dev/busvar.h>                 /* for pseudo_inits */
 121 #include <sys/kdebug.h>
 122
 123 #include <mach/mach_types.h>
 124 #include <mach/vm_prot.h>
 125 #include <mach/semaphore.h>
 126 #include <mach/sync_policy.h>
 127 #include <kern/clock.h>
 128 #include <mach/kern_return.h>
 129 #include <mach/thread_act.h>            /* for thread_resume() */
 130 #include <mach/task.h>                  /* for task_set_exception_ports() */
 131 #include <sys/ux_exception.h>           /* for ux_handler() */
 132 #include <sys/ubc_internal.h>           /* for ubc_init() */
 133 #include <sys/mcache.h>                 /* for mcache_init() */
 134 #include <sys/mbuf.h>                   /* for mbinit() */
 135 #include <sys/event.h>                  /* for knote_init() */
 136 #include <sys/kern_memorystatus.h>      /* for memorystatus_init() */
 137 #include <sys/aio_kern.h>               /* for aio_init() */
 138 #include <sys/semaphore.h>              /* for psem_cache_init() */
 139 #include <net/dlil.h>                   /* for dlil_init() */
 140 #include <net/kpi_protocol.h>           /* for proto_kpi_init() */
 141 #include <net/iptap.h>                  /* for iptap_init() */
 142 #include <sys/pipe.h>                   /* for pipeinit() */
 143 #include <sys/socketvar.h>              /* for socketinit() */
 144 #include <sys/protosw.h>                /* for domaininit() */
 145 #include <kern/sched_prim.h>            /* for thread_wakeup() */
 146 #include <net/if_ether.h>               /* for ether_family_init() */
 147 #include <net/if_gif.h>                 /* for gif_init() */
 148 #include <vm/vm_protos.h>               /* for vnode_pager_bootstrap() */
 149 #include <miscfs/devfs/devfsdefs.h>     /* for devfs_kernel_mount() */
 150 #include <mach/host_priv.h>             /* for host_set_exception_ports() */
 151 #include <kern/host.h>                  /* for host_priv_self() */
 152 #include <vm/vm_kern.h>                 /* for kmem_suballoc() */
 153 #include <sys/semaphore.h>              /* for psem_lock_init() */
 154 #include <sys/msgbuf.h>                 /* for log_setsize() */
 155 #include <sys/tty.h>                    /* for tty_init() */
 156 #include <sys/proc_uuid_policy.h>       /* proc_uuid_policy_init() */
 157 #include <netinet/flow_divert.h>        /* flow_divert_init() */
 158 #include <net/content_filter.h>         /* for cfil_init() */
 159 #include <net/necp.h>                   /* for necp_init() */
 160 #include <net/network_agent.h>          /* for netagent_init() */
 161 #include <net/packet_mangler.h>         /* for pkt_mnglr_init() */
 162 #include <net/if_utun.h>                /* for utun_register_control() */
 163 #include <net/if_ipsec.h>               /* for ipsec_register_control() */
 164 #include <net/net_str_id.h>             /* for net_str_id_init() */
 165 #include <net/netsrc.h>                 /* for netsrc_init() */
 166 #include <net/ntstat.h>                 /* for nstat_init() */
 167 #include <netinet/tcp_cc.h>                     /* for tcp_cc_init() */
 168 #include <netinet/mptcp_var.h>          /* for mptcp_control_register() */
 169 #include <kern/assert.h>                /* for assert() */
 170 #include <sys/kern_overrides.h>         /* for init_system_override() */
 171
 172 #include <net/init.h>
 173
 174 #if CONFIG_MACF
 175 #include <security/mac_framework.h>
 176 #include <security/mac_internal.h>      /* mac_init_bsd() */
 177 #include <security/mac_mach_internal.h> /* mac_update_task_label() */
 178 #endif
 179
 180 #include <machine/exec.h>
 181
 182 #if NFSCLIENT
 183 #include <sys/netboot.h>
 184 #endif
 185
 186 #if CONFIG_IMAGEBOOT
 187 #include <sys/imageboot.h>
 188 #endif
 189
 190 #if PFLOG
 191 #include <net/if_pflog.h>
 192 #endif
 193
 194 #include <pexpert/pexpert.h>
 195 #include <machine/pal_routines.h>
 196 #include <console/video_console.h>
 197
 198
 199 void * get_user_regs(thread_t);         /* XXX kludge for <machine/thread.h> */
 200 void IOKitInitializeTime(void);         /* XXX */
 201 void IOSleep(unsigned int);             /* XXX */
 202 void loopattach(void);                  /* XXX */
 203
 204 const char    copyright[] =
 205 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n\t"
 206 "The Regents of the University of California. "
 207 "All rights reserved.\n\n";
 208
 209 /* Components of the first process -- never freed. */
 210 struct  proc proc0;
 211 struct  session session0;
 212 struct  pgrp pgrp0;
 213 struct  filedesc filedesc0;
 214 struct  plimit limit0;
 215 struct  pstats pstats0;
 216 struct  sigacts sigacts0;
 217 proc_t kernproc;
 218 proc_t initproc;
 219
 220 long tk_cancc;
 221 long tk_nin;
 222 long tk_nout;
 223 long tk_rawcc;
 224
 225 int lock_trace = 0;
 226 /* Global variables to make pstat happy. We do swapping differently */
 227 int nswdev, nswap;
 228 int nswapmap;
 229 void *swapmap;
 230 struct swdevt swdevt[1];
 231
 232 dev_t   rootdev;                /* device of the root */
 233 dev_t   dumpdev;                /* device to take dumps on */
 234 long    dumplo;                 /* offset into dumpdev */
 235 long    hostid;
 236 char    hostname[MAXHOSTNAMELEN];
 237 int             hostnamelen;
 238 char    domainname[MAXDOMNAMELEN];
 239 int             domainnamelen;
 240
 241 char rootdevice[16];    /* hfs device names have at least 9 chars */
 242
 243 #if  KMEMSTATS
 244 struct  kmemstats kmemstats[M_LAST];
 245 #endif
 246
 247 struct  vnode *rootvp;
 248 int boothowto = RB_DEBUG;
 249 int minimalboot = 0;
 250
 251 #if PROC_REF_DEBUG
 252 __private_extern__ int proc_ref_tracking_disabled = 0; /* disable panics on leaked proc refs across syscall boundary */
 253 #endif
 254
 255 extern kern_return_t IOFindBSDRoot(char *, unsigned int, dev_t *, u_int32_t *);
 256 extern void IOSecureBSDRoot(const char * rootName);
 257 extern kern_return_t IOKitBSDInit(void );
 258 extern void kminit(void);
 259 extern void file_lock_init(void);
 260 extern void kmeminit(void);
 261 extern void bsd_bufferinit(void);
 262 extern void throttle_init(void);
 263 extern void macx_init(void);
 264 extern void acct_init(void);
 265
 266 extern int serverperfmode;
 267 extern int ncl;
 268
 269 vm_map_t        bsd_pageable_map;
 270 vm_map_t        mb_map;
 271
 272 static  int bsd_simul_execs;
 273 static int bsd_pageable_map_size;
 274 __private_extern__ int execargs_cache_size = 0;
 275 __private_extern__ int execargs_free_count = 0;
 276 __private_extern__ vm_offset_t * execargs_cache = NULL;
 277
 278 void bsd_exec_setup(int);
 279
 280 __private_extern__ int bootarg_vnode_cache_defeat = 0;
 281
 282 #if CONFIG_JETSAM && (DEVELOPMENT || DEBUG)
 283 __private_extern__ int bootarg_no_vnode_jetsam = 0;
 284 #endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */
 285
 286 /*
 287  * Prevent kernel-based ASLR from being used, for testing.
 288  */
 289 #if DEVELOPMENT || DEBUG
 290 __private_extern__ int bootarg_disable_aslr = 0;
 291 #endif
 292
 293 int     cmask = CMASK;
 294 extern int customnbuf;
 295
 296 void bsd_init(void);
 297 kern_return_t bsd_autoconf(void);
 298 void bsd_utaskbootstrap(void);
 299
 300 static void parse_bsd_args(void);
 301 extern task_t bsd_init_task;
 302 extern boolean_t init_task_died;
 303 #if CONFIG_DEV_KMEM
 304 extern void dev_kmem_init(void);
 305 #endif
 306 extern void time_zone_slock_init(void);
 307 extern void select_waitq_init(void);
 308 static void process_name(const char *, proc_t);
 309
 310 static void setconf(void);
 311
 312 #if SYSV_SHM
 313 extern void sysv_shm_lock_init(void);
 314 #endif
 315 #if SYSV_SEM
 316 extern void sysv_sem_lock_init(void);
 317 #endif
 318 #if SYSV_MSG
 319 extern void sysv_msg_lock_init(void);
 320 #endif
 321
 322 #if CONFIG_MACF
 323 #if defined (__i386__) || defined (__x86_64__)
 324 /* MACF policy_check configuration flags; see policy_check.c for details */
 325 int policy_check_flags = 0;
 326
 327 extern int check_policy_init(int);
 328 #endif
 329 #endif  /* CONFIG_MACF */
 330
 331 /* If we are using CONFIG_DTRACE */
 332 #if CONFIG_DTRACE
 333         extern void dtrace_postinit(void);
 334 #endif
 335
 336 /*
 337  * Initialization code.
 338  * Called from cold start routine as
 339  * soon as a stack and segmentation
 340  * have been established.
 341  * Functions:
 342  *      turn on clock
 343  *      hand craft 0th process
 344  *      call all initialization routines
 345  *  hand craft 1st user process
 346  */
 347
 348 /*
 349  *      Sets the name for the given task.
 350  */
 351 static void
 352 process_name(const char *s, proc_t p)
 353 {
 354        strlcpy(p->p_comm, s, sizeof(p->p_comm));
 355        strlcpy(p->p_name, s, sizeof(p->p_name));
 356 }
 357
 358 /* To allow these values to be patched, they're globals here */
 359 #include <machine/vmparam.h>
 360 struct rlimit vm_initial_limit_stack = { DFLSSIZ, MAXSSIZ - PAGE_MAX_SIZE };
 361 struct rlimit vm_initial_limit_data = { DFLDSIZ, MAXDSIZ };
 362 struct rlimit vm_initial_limit_core = { DFLCSIZ, MAXCSIZ };
 363
 364 extern thread_t cloneproc(task_t, coalition_t, proc_t, int, int);
 365 extern int      (*mountroot)(void);
 366
 367 lck_grp_t * proc_lck_grp;
 368 lck_grp_t * proc_slock_grp;
 369 lck_grp_t * proc_fdmlock_grp;
 370 lck_grp_t * proc_mlock_grp;
 371 lck_grp_attr_t * proc_lck_grp_attr;
 372 lck_attr_t * proc_lck_attr;
 373 lck_mtx_t * proc_list_mlock;
 374 lck_mtx_t * proc_klist_mlock;
 375
 376 extern lck_mtx_t * execargs_cache_lock;
 377
 378 /* hook called after root is mounted XXX temporary hack */
 379 void (*mountroot_post_hook)(void);
 380 void (*unmountroot_pre_hook)(void);
 381
 382 /*
 383  * This function is called very early on in the Mach startup, from the
 384  * function start_kernel_threads() in osfmk/kern/startup.c.  It's called
 385  * in the context of the current (startup) task using a call to the
 386  * function kernel_thread_create() to jump into start_kernel_threads().
 387  * Internally, kernel_thread_create() calls thread_create_internal(),
 388  * which calls uthread_alloc().  The function of uthread_alloc() is
 389  * normally to allocate a uthread structure, and fill out the uu_sigmask,
 390  * uu_context fields.  It skips filling these out in the case of the "task"
 391  * being "kernel_task", because the order of operation is inverted.  To
 392  * account for that, we need to manually fill in at least the contents
 393  * of the uu_context.vc_ucred field so that the uthread structure can be
 394  * used like any other.
 395  */
 396
 397 void
 398 bsd_init(void)
 399 {
 400         struct uthread *ut;
 401         unsigned int i;
 402         struct vfs_context context;
 403         kern_return_t   ret;
 404         struct ucred temp_cred;
 405         struct posix_cred temp_pcred;
 406 #if NFSCLIENT || CONFIG_IMAGEBOOT
 407         boolean_t       netboot = FALSE;
 408 #endif
 409
 410 #define bsd_init_kprintf(x...) /* kprintf("bsd_init: " x) */
 411
 412         throttle_init();
 413
 414         printf(copyright);
 415
 416         bsd_init_kprintf("calling kmeminit\n");
 417         kmeminit();
 418
 419         bsd_init_kprintf("calling parse_bsd_args\n");
 420         parse_bsd_args();
 421
 422 #if CONFIG_DEV_KMEM
 423         bsd_init_kprintf("calling dev_kmem_init\n");
 424         dev_kmem_init();
 425 #endif
 426
 427         /* Initialize kauth subsystem before instancing the first credential */
 428         bsd_init_kprintf("calling kauth_init\n");
 429         kauth_init();
 430
 431         /* Initialize process and pgrp structures. */
 432         bsd_init_kprintf("calling procinit\n");
 433         procinit();
 434
 435         /* Initialize the ttys (MUST be before kminit()/bsd_autoconf()!)*/
 436         tty_init();
 437
 438         kernproc = &proc0;      /* implicitly bzero'ed */
 439
 440         /* kernel_task->proc = kernproc; */
 441         set_bsdtask_info(kernel_task,(void *)kernproc);
 442
 443         /* give kernproc a name */
 444         bsd_init_kprintf("calling process_name\n");
 445         process_name("kernel_task", kernproc);
 446
 447         /* allocate proc lock group attribute and group */
 448         bsd_init_kprintf("calling lck_grp_attr_alloc_init\n");
 449         proc_lck_grp_attr= lck_grp_attr_alloc_init();
 450
 451         proc_lck_grp = lck_grp_alloc_init("proc",  proc_lck_grp_attr);
 452 #if CONFIG_FINE_LOCK_GROUPS
 453         proc_slock_grp = lck_grp_alloc_init("proc-slock",  proc_lck_grp_attr);
 454         proc_fdmlock_grp = lck_grp_alloc_init("proc-fdmlock",  proc_lck_grp_attr);
 455         proc_mlock_grp = lck_grp_alloc_init("proc-mlock",  proc_lck_grp_attr);
 456 #endif
 457         /* Allocate proc lock attribute */
 458         proc_lck_attr = lck_attr_alloc_init();
 459 #if 0
 460 #if __PROC_INTERNAL_DEBUG
 461         lck_attr_setdebug(proc_lck_attr);
 462 #endif
 463 #endif
 464
 465 #if CONFIG_FINE_LOCK_GROUPS
 466         proc_list_mlock = lck_mtx_alloc_init(proc_mlock_grp, proc_lck_attr);
 467         proc_klist_mlock = lck_mtx_alloc_init(proc_mlock_grp, proc_lck_attr);
 468         lck_mtx_init(&kernproc->p_mlock, proc_mlock_grp, proc_lck_attr);
 469         lck_mtx_init(&kernproc->p_fdmlock, proc_fdmlock_grp, proc_lck_attr);
 470         lck_spin_init(&kernproc->p_slock, proc_slock_grp, proc_lck_attr);
 471 #else
 472         proc_list_mlock = lck_mtx_alloc_init(proc_lck_grp, proc_lck_attr);
 473         proc_klist_mlock = lck_mtx_alloc_init(proc_lck_grp, proc_lck_attr);
 474         lck_mtx_init(&kernproc->p_mlock, proc_lck_grp, proc_lck_attr);
 475         lck_mtx_init(&kernproc->p_fdmlock, proc_lck_grp, proc_lck_attr);
 476         lck_spin_init(&kernproc->p_slock, proc_lck_grp, proc_lck_attr);
 477 #endif
 478
 479         assert(bsd_simul_execs != 0);
 480         execargs_cache_lock = lck_mtx_alloc_init(proc_lck_grp, proc_lck_attr);
 481         execargs_cache_size = bsd_simul_execs;
 482         execargs_free_count = bsd_simul_execs;
 483         execargs_cache = (vm_offset_t *)kalloc(bsd_simul_execs * sizeof(vm_offset_t));
 484         bzero(execargs_cache, bsd_simul_execs * sizeof(vm_offset_t));
 485
 486         if (current_task() != kernel_task)
 487                 printf("bsd_init: We have a problem, "
 488                                 "current task is not kernel task\n");
 489
 490         bsd_init_kprintf("calling get_bsdthread_info\n");
 491         ut = (uthread_t)get_bsdthread_info(current_thread());
 492
 493 #if CONFIG_MACF
 494         /*
 495          * Initialize the MAC Framework
 496          */
 497         mac_policy_initbsd();
 498         kernproc->p_mac_enforce = 0;
 499
 500 #if defined (__i386__) || defined (__x86_64__)
 501         /*
 502          * We currently only support this on i386/x86_64, as that is the
 503          * only lock code we have instrumented so far.
 504          */
 505         check_policy_init(policy_check_flags);
 506 #endif
 507 #endif /* MAC */
 508
 509         /* Initialize System Override call */
 510         init_system_override();
 511
 512         /*
 513          * Create process 0.
 514          */
 515         proc_list_lock();
 516         LIST_INSERT_HEAD(&allproc, kernproc, p_list);
 517         kernproc->p_pgrp = &pgrp0;
 518         LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
 519         LIST_INIT(&pgrp0.pg_members);
 520 #ifdef CONFIG_FINE_LOCK_GROUPS
 521         lck_mtx_init(&pgrp0.pg_mlock, proc_mlock_grp, proc_lck_attr);
 522 #else
 523         lck_mtx_init(&pgrp0.pg_mlock, proc_lck_grp, proc_lck_attr);
 524 #endif
 525         /* There is no other bsd thread this point and is safe without pgrp lock */
 526         LIST_INSERT_HEAD(&pgrp0.pg_members, kernproc, p_pglist);
 527         kernproc->p_listflag |= P_LIST_INPGRP;
 528         kernproc->p_pgrpid = 0;
 529         kernproc->p_uniqueid = 0;
 530
 531         pgrp0.pg_session = &session0;
 532         pgrp0.pg_membercnt = 1;
 533
 534         session0.s_count = 1;
 535         session0.s_leader = kernproc;
 536         session0.s_listflags = 0;
 537 #ifdef CONFIG_FINE_LOCK_GROUPS
 538         lck_mtx_init(&session0.s_mlock, proc_mlock_grp, proc_lck_attr);
 539 #else
 540         lck_mtx_init(&session0.s_mlock, proc_lck_grp, proc_lck_attr);
 541 #endif
 542         LIST_INSERT_HEAD(SESSHASH(0), &session0, s_hash);
 543         proc_list_unlock();
 544
 545         kernproc->task = kernel_task;
 546
 547         kernproc->p_stat = SRUN;
 548         kernproc->p_flag = P_SYSTEM;
 549         kernproc->p_lflag = 0;
 550         kernproc->p_ladvflag = 0;
 551
 552 #if DEVELOPMENT || DEBUG
 553         if (bootarg_disable_aslr)
 554                 kernproc->p_flag |= P_DISABLE_ASLR;
 555 #endif
 556
 557         kernproc->p_nice = NZERO;
 558         kernproc->p_pptr = kernproc;
 559
 560         TAILQ_INIT(&kernproc->p_uthlist);
 561         TAILQ_INSERT_TAIL(&kernproc->p_uthlist, ut, uu_list);
 562
 563         kernproc->sigwait = FALSE;
 564         kernproc->sigwait_thread = THREAD_NULL;
 565         kernproc->exit_thread = THREAD_NULL;
 566         kernproc->p_csflags = CS_VALID;
 567
 568         /*
 569          * Create credential.  This also Initializes the audit information.
 570          */
 571         bsd_init_kprintf("calling bzero\n");
 572         bzero(&temp_cred, sizeof(temp_cred));
 573         bzero(&temp_pcred, sizeof(temp_pcred));
 574         temp_pcred.cr_ngroups = 1;
 575         /* kern_proc, shouldn't call up to DS for group membership */
 576         temp_pcred.cr_flags = CRF_NOMEMBERD;
 577         temp_cred.cr_audit.as_aia_p = audit_default_aia_p;
 578
 579         bsd_init_kprintf("calling kauth_cred_create\n");
 580         /*
 581          * We have to label the temp cred before we create from it to
 582          * properly set cr_ngroups, or the create will fail.
 583          */
 584         posix_cred_label(&temp_cred, &temp_pcred);
 585         kernproc->p_ucred = kauth_cred_create(&temp_cred);
 586
 587         /* update cred on proc */
 588         PROC_UPDATE_CREDS_ONPROC(kernproc);
 589
 590         /* give the (already exisiting) initial thread a reference on it */
 591         bsd_init_kprintf("calling kauth_cred_ref\n");
 592         kauth_cred_ref(kernproc->p_ucred);
 593         ut->uu_context.vc_ucred = kernproc->p_ucred;
 594         ut->uu_context.vc_thread = current_thread();
 595
 596         TAILQ_INIT(&kernproc->p_aio_activeq);
 597         TAILQ_INIT(&kernproc->p_aio_doneq);
 598         kernproc->p_aio_total_count = 0;
 599         kernproc->p_aio_active_count = 0;
 600
 601         bsd_init_kprintf("calling file_lock_init\n");
 602         file_lock_init();
 603
 604 #if CONFIG_MACF
 605         mac_cred_label_associate_kernel(kernproc->p_ucred);
 606 #endif
 607
 608         /* Create the file descriptor table. */
 609         kernproc->p_fd = &filedesc0;
 610         filedesc0.fd_cmask = cmask;
 611         filedesc0.fd_knlistsize = -1;
 612         filedesc0.fd_knlist = NULL;
 613         filedesc0.fd_knhash = NULL;
 614         filedesc0.fd_knhashmask = 0;
 615
 616         /* Create the limits structures. */
 617         kernproc->p_limit = &limit0;
 618         for (i = 0; i < sizeof(kernproc->p_rlimit)/sizeof(kernproc->p_rlimit[0]); i++)
 619                 limit0.pl_rlimit[i].rlim_cur =
 620                         limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
 621         limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE;
 622         limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = maxprocperuid;
 623         limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
 624         limit0.pl_rlimit[RLIMIT_STACK] = vm_initial_limit_stack;
 625         limit0.pl_rlimit[RLIMIT_DATA] = vm_initial_limit_data;
 626         limit0.pl_rlimit[RLIMIT_CORE] = vm_initial_limit_core;
 627         limit0.pl_refcnt = 1;
 628
 629         kernproc->p_stats = &pstats0;
 630         kernproc->p_sigacts = &sigacts0;
 631
 632         /*
 633          * Charge root for one process: launchd.
 634          */
 635         bsd_init_kprintf("calling chgproccnt\n");
 636         (void)chgproccnt(0, 1);
 637
 638         /*
 639          *      Allocate a kernel submap for pageable memory
 640          *      for temporary copying (execve()).
 641          */
 642         {
 643                 vm_offset_t     minimum;
 644
 645                 bsd_init_kprintf("calling kmem_suballoc\n");
 646                 assert(bsd_pageable_map_size != 0);
 647                 ret = kmem_suballoc(kernel_map,
 648                                 &minimum,
 649                                 (vm_size_t)bsd_pageable_map_size,
 650                                 TRUE,
 651                                 VM_FLAGS_ANYWHERE | VM_MAKE_TAG(VM_KERN_MEMORY_BSD),
 652                                 &bsd_pageable_map);
 653                 if (ret != KERN_SUCCESS)
 654                         panic("bsd_init: Failed to allocate bsd pageable map");
 655         }
 656
 657         /*
 658          * Initialize buffers and hash links for buffers
 659          *
 660          * SIDE EFFECT: Starts a thread for bcleanbuf_thread(), so must
 661          *              happen after a credential has been associated with
 662          *              the kernel task.
 663          */
 664         bsd_init_kprintf("calling bsd_bufferinit\n");
 665         bsd_bufferinit();
 666
 667         /* Initialize the execve() semaphore */
 668         bsd_init_kprintf("calling semaphore_create\n");
 669
 670         if (ret != KERN_SUCCESS)
 671                 panic("bsd_init: Failed to create execve semaphore");
 672
 673         /*
 674          * Initialize the calendar.
 675          */
 676         bsd_init_kprintf("calling IOKitInitializeTime\n");
 677         IOKitInitializeTime();
 678
 679         bsd_init_kprintf("calling ubc_init\n");
 680         ubc_init();
 681
 682         /*
 683          * Initialize device-switches.
 684          */
 685         bsd_init_kprintf("calling devsw_init() \n");
 686         devsw_init();
 687
 688         /* Initialize the file systems. */
 689         bsd_init_kprintf("calling vfsinit\n");
 690         vfsinit();
 691
 692 #if CONFIG_PROC_UUID_POLICY
 693         /* Initial proc_uuid_policy subsystem */
 694         bsd_init_kprintf("calling proc_uuid_policy_init()\n");
 695         proc_uuid_policy_init();
 696 #endif
 697
 698 #if SOCKETS
 699         /* Initialize per-CPU cache allocator */
 700         mcache_init();
 701
 702         /* Initialize mbuf's. */
 703         bsd_init_kprintf("calling mbinit\n");
 704         mbinit();
 705         net_str_id_init(); /* for mbuf tags */
 706 #endif /* SOCKETS */
 707
 708         /*
 709          * Initializes security event auditing.
 710          * XXX: Should/could this occur later?
 711          */
 712 #if CONFIG_AUDIT
 713         bsd_init_kprintf("calling audit_init\n");
 714         audit_init();
 715 #endif
 716
 717         /* Initialize kqueues */
 718         bsd_init_kprintf("calling knote_init\n");
 719         knote_init();
 720
 721         /* Initialize for async IO */
 722         bsd_init_kprintf("calling aio_init\n");
 723         aio_init();
 724
 725         /* Initialize pipes */
 726         bsd_init_kprintf("calling pipeinit\n");
 727         pipeinit();
 728
 729         /* Initialize SysV shm subsystem locks; the subsystem proper is
 730          * initialized through a sysctl.
 731          */
 732 #if SYSV_SHM
 733         bsd_init_kprintf("calling sysv_shm_lock_init\n");
 734         sysv_shm_lock_init();
 735 #endif
 736 #if SYSV_SEM
 737         bsd_init_kprintf("calling sysv_sem_lock_init\n");
 738         sysv_sem_lock_init();
 739 #endif
 740 #if SYSV_MSG
 741         bsd_init_kprintf("sysv_msg_lock_init\n");
 742         sysv_msg_lock_init();
 743 #endif
 744         bsd_init_kprintf("calling pshm_lock_init\n");
 745         pshm_lock_init();
 746         bsd_init_kprintf("calling psem_lock_init\n");
 747         psem_lock_init();
 748
 749         pthread_init();
 750         /* POSIX Shm and Sem */
 751         bsd_init_kprintf("calling pshm_cache_init\n");
 752         pshm_cache_init();
 753         bsd_init_kprintf("calling psem_cache_init\n");
 754         psem_cache_init();
 755         bsd_init_kprintf("calling time_zone_slock_init\n");
 756         time_zone_slock_init();
 757         bsd_init_kprintf("calling select_waitq_init\n");
 758         select_waitq_init();
 759
 760         /*
 761          * Initialize protocols.  Block reception of incoming packets
 762          * until everything is ready.
 763          */
 764         bsd_init_kprintf("calling sysctl_register_fixed\n");
 765         sysctl_register_fixed();
 766         bsd_init_kprintf("calling sysctl_mib_init\n");
 767         sysctl_mib_init();
 768 #if NETWORKING
 769         bsd_init_kprintf("calling dlil_init\n");
 770         dlil_init();
 771         bsd_init_kprintf("calling proto_kpi_init\n");
 772         proto_kpi_init();
 773 #endif /* NETWORKING */
 774 #if SOCKETS
 775         bsd_init_kprintf("calling socketinit\n");
 776         socketinit();
 777         bsd_init_kprintf("calling domaininit\n");
 778         domaininit();
 779         iptap_init();
 780 #if FLOW_DIVERT
 781         flow_divert_init();
 782 #endif  /* FLOW_DIVERT */
 783 #endif /* SOCKETS */
 784
 785         kernproc->p_fd->fd_cdir = NULL;
 786         kernproc->p_fd->fd_rdir = NULL;
 787
 788 #if CONFIG_FREEZE
 789 #ifndef CONFIG_MEMORYSTATUS
 790     #error "CONFIG_FREEZE defined without matching CONFIG_MEMORYSTATUS"
 791 #endif
 792         /* Initialise background freezing */
 793         bsd_init_kprintf("calling memorystatus_freeze_init\n");
 794         memorystatus_freeze_init();
 795 #endif
 796
 797 #if CONFIG_MEMORYSTATUS
 798         /* Initialize kernel memory status notifications */
 799         bsd_init_kprintf("calling memorystatus_init\n");
 800         memorystatus_init();
 801 #endif /* CONFIG_MEMORYSTATUS */
 802
 803         bsd_init_kprintf("calling macx_init\n");
 804         macx_init();
 805
 806         bsd_init_kprintf("calling acct_init\n");
 807         acct_init();
 808
 809 #ifdef GPROF
 810         /* Initialize kernel profiling. */
 811         kmstartup();
 812 #endif
 813
 814         bsd_init_kprintf("calling bsd_autoconf\n");
 815         bsd_autoconf();
 816
 817 #if CONFIG_DTRACE
 818         dtrace_postinit();
 819 #endif
 820
 821         /*
 822          * We attach the loopback interface *way* down here to ensure
 823          * it happens after autoconf(), otherwise it becomes the
 824          * "primary" interface.
 825          */
 826 #include <loop.h>
 827 #if NLOOP > 0
 828         bsd_init_kprintf("calling loopattach\n");
 829         loopattach();                   /* XXX */
 830 #endif
 831 #if NGIF
 832         /* Initialize gif interface (after lo0) */
 833         gif_init();
 834 #endif
 835
 836 #if PFLOG
 837         /* Initialize packet filter log interface */
 838         pfloginit();
 839 #endif /* PFLOG */
 840
 841 #if NETHER > 0
 842         /* Register the built-in dlil ethernet interface family */
 843         bsd_init_kprintf("calling ether_family_init\n");
 844         ether_family_init();
 845 #endif /* ETHER */
 846
 847 #if NETWORKING
 848         /* Call any kext code that wants to run just after network init */
 849         bsd_init_kprintf("calling net_init_run\n");
 850         net_init_run();
 851
 852 #if CONTENT_FILTER
 853         cfil_init();
 854 #endif
 855
 856 #if PACKET_MANGLER
 857         pkt_mnglr_init();
 858 #endif
 859
 860 #if NECP
 861         /* Initialize Network Extension Control Policies */
 862         necp_init();
 863 #endif
 864
 865         netagent_init();
 866
 867         /* register user tunnel kernel control handler */
 868         utun_register_control();
 869 #if IPSEC
 870         ipsec_register_control();
 871 #endif /* IPSEC */
 872         netsrc_init();
 873         nstat_init();
 874         tcp_cc_init();
 875 #if MPTCP
 876         mptcp_control_register();
 877 #endif /* MPTCP */
 878 #endif /* NETWORKING */
 879
 880         bsd_init_kprintf("calling vnode_pager_bootstrap\n");
 881         vnode_pager_bootstrap();
 882
 883         bsd_init_kprintf("calling inittodr\n");
 884         inittodr(0);
 885
 886         /* Mount the root file system. */
 887         while( TRUE) {
 888                 int err;
 889
 890                 bsd_init_kprintf("calling setconf\n");
 891                 setconf();
 892 #if NFSCLIENT
 893                 netboot = (mountroot == netboot_mountroot);
 894 #endif
 895
 896                 bsd_init_kprintf("vfs_mountroot\n");
 897                 if (0 == (err = vfs_mountroot()))
 898                         break;
 899                 rootdevice[0] = '\0';
 900 #if NFSCLIENT
 901                 if (netboot) {
 902                         PE_display_icon( 0, "noroot");  /* XXX a netboot-specific icon would be nicer */
 903                         vc_progress_set(FALSE, 0);
 904                         for (i=1; 1; i*=2) {
 905                                 printf("bsd_init: failed to mount network root, error %d, %s\n",
 906                                         err, PE_boot_args());
 907                                 printf("We are hanging here...\n");
 908                                 IOSleep(i*60*1000);
 909                         }
 910                         /*NOTREACHED*/
 911                 }
 912 #endif
 913                 printf("cannot mount root, errno = %d\n", err);
 914                 boothowto |= RB_ASKNAME;
 915         }
 916
 917         IOSecureBSDRoot(rootdevice);
 918
 919         context.vc_thread = current_thread();
 920         context.vc_ucred = kernproc->p_ucred;
 921         mountlist.tqh_first->mnt_flag |= MNT_ROOTFS;
 922
 923         bsd_init_kprintf("calling VFS_ROOT\n");
 924         /* Get the vnode for '/'.  Set fdp->fd_fd.fd_cdir to reference it. */
 925         if (VFS_ROOT(mountlist.tqh_first, &rootvnode, &context))
 926                 panic("bsd_init: cannot find root vnode: %s", PE_boot_args());
 927         rootvnode->v_flag |= VROOT;
 928         (void)vnode_ref(rootvnode);
 929         (void)vnode_put(rootvnode);
 930         filedesc0.fd_cdir = rootvnode;
 931
 932 #if NFSCLIENT
 933         if (netboot) {
 934                 int err;
 935
 936                 netboot = TRUE;
 937                 /* post mount setup */
 938                 if ((err = netboot_setup()) != 0) {
 939                         PE_display_icon( 0, "noroot");  /* XXX a netboot-specific icon would be nicer */
 940                         vc_progress_set(FALSE, 0);
 941                         for (i=1; 1; i*=2) {
 942                                 printf("bsd_init: NetBoot could not find root, error %d: %s\n",
 943                                         err, PE_boot_args());
 944                                 printf("We are hanging here...\n");
 945                                 IOSleep(i*60*1000);
 946                         }
 947                         /*NOTREACHED*/
 948                 }
 949         }
 950 #endif
 951
 952
 953 #if CONFIG_IMAGEBOOT
 954         /*
 955          * See if a system disk image is present. If so, mount it and
 956          * switch the root vnode to point to it
 957          */
 958         if (netboot == FALSE && imageboot_needed()) {
 959                 /*
 960                  * An image was found.  No turning back: we're booted
 961                  * with a kernel from the disk image.
 962                  */
 963                 imageboot_setup();
 964         }
 965 #endif /* CONFIG_IMAGEBOOT */
 966
 967         /* set initial time; all other resource data is  already zero'ed */
 968         microtime_with_abstime(&kernproc->p_start, &kernproc->p_stats->ps_start);
 969
 970 #if DEVFS
 971         {
 972             char mounthere[] = "/dev";  /* !const because of internal casting */
 973
 974             bsd_init_kprintf("calling devfs_kernel_mount\n");
 975             devfs_kernel_mount(mounthere);
 976         }
 977 #endif /* DEVFS */
 978
 979         /* Initialize signal state for process 0. */
 980         bsd_init_kprintf("calling siginit\n");
 981         siginit(kernproc);
 982
 983         bsd_init_kprintf("calling bsd_utaskbootstrap\n");
 984         bsd_utaskbootstrap();
 985
 986 #if defined(__LP64__)
 987         kernproc->p_flag |= P_LP64;
 988 #endif
 989
 990         pal_kernel_announce();
 991
 992         bsd_init_kprintf("calling mountroot_post_hook\n");
 993
 994         /* invoke post-root-mount hook */
 995         if (mountroot_post_hook != NULL)
 996                 mountroot_post_hook();
 997
 998 #if 0 /* not yet */
 999         consider_zone_gc(FALSE);
1000 #endif
1001
1002
1003         bsd_init_kprintf("done\n");
1004 }
1005
1006 void
1007 bsdinit_task(void)
1008 {
1009         proc_t p = current_proc();
1010         struct uthread *ut;
1011         thread_t thread;
1012
1013         process_name("init", p);
1014
1015         ux_handler_init();
1016
1017         thread = current_thread();
1018         (void) host_set_exception_ports(host_priv_self(),
1019                                         EXC_MASK_ALL & ~(EXC_MASK_RPC_ALERT),//pilotfish (shark) needs this port
1020                                         (mach_port_t) ux_exception_port,
1021                                         EXCEPTION_DEFAULT| MACH_EXCEPTION_CODES,
1022                                         0);
1023
1024         ut = (uthread_t)get_bsdthread_info(thread);
1025
1026         bsd_init_task = get_threadtask(thread);
1027         init_task_died = FALSE;
1028
1029 #if CONFIG_MACF
1030         mac_cred_label_associate_user(p->p_ucred);
1031 #endif
1032         load_init_program(p);
1033         lock_trace = 1;
1034 }
1035
1036 kern_return_t
1037 bsd_autoconf(void)
1038 {
1039         kprintf("bsd_autoconf: calling kminit\n");
1040         kminit();
1041
1042         /*
1043          * Early startup for bsd pseudodevices.
1044          */
1045         {
1046             struct pseudo_init *pi;
1047
1048             for (pi = pseudo_inits; pi->ps_func; pi++)
1049                 (*pi->ps_func) (pi->ps_count);
1050         }
1051
1052         return( IOKitBSDInit());
1053 }
1054
1055
1056 #include <sys/disklabel.h>  /* for MAXPARTITIONS */
1057
1058 static void
1059 setconf(void)
1060 {
1061         u_int32_t       flags;
1062         kern_return_t   err;
1063
1064         err = IOFindBSDRoot(rootdevice, sizeof(rootdevice), &rootdev, &flags);
1065         if( err) {
1066                 printf("setconf: IOFindBSDRoot returned an error (%d);"
1067                         "setting rootdevice to 'sd0a'.\n", err); /* XXX DEBUG TEMP */
1068                 rootdev = makedev( 6, 0 );
1069                 strlcpy(rootdevice, "sd0a", sizeof(rootdevice));
1070                 flags = 0;
1071         }
1072
1073 #if NFSCLIENT
1074         if( flags & 1 ) {
1075                 /* network device */
1076                 mountroot = netboot_mountroot;
1077         } else {
1078 #endif
1079                 /* otherwise have vfs determine root filesystem */
1080                 mountroot = NULL;
1081 #if NFSCLIENT
1082         }
1083 #endif
1084
1085 }
1086
1087 void
1088 bsd_utaskbootstrap(void)
1089 {
1090         thread_t thread;
1091         struct uthread *ut;
1092
1093         /*
1094          * Clone the bootstrap process from the kernel process, without
1095          * inheriting either task characteristics or memory from the kernel;
1096          */
1097         thread = cloneproc(TASK_NULL, COALITION_NULL, kernproc, FALSE, TRUE);
1098
1099         /* Hold the reference as it will be dropped during shutdown */
1100         initproc = proc_find(1);
1101 #if __PROC_INTERNAL_DEBUG
1102         if (initproc == PROC_NULL)
1103                 panic("bsd_utaskbootstrap: initproc not set\n");
1104 #endif
1105         /*
1106          * Since we aren't going back out the normal way to our parent,
1107          * we have to drop the transition locks explicitly.
1108          */
1109         proc_signalend(initproc, 0);
1110         proc_transend(initproc, 0);
1111
1112         ut = (struct uthread *)get_bsdthread_info(thread);
1113         ut->uu_sigmask = 0;
1114         act_set_astbsd(thread);
1115         proc_clear_return_wait(initproc, thread);
1116 }
1117
1118 static void
1119 parse_bsd_args(void)
1120 {
1121         char namep[16];
1122         int msgbuf;
1123
1124         if ( PE_parse_boot_argn("-s", namep, sizeof (namep)))
1125                 boothowto |= RB_SINGLE;
1126
1127         if (PE_parse_boot_argn("-b", namep, sizeof (namep)))
1128                 boothowto |= RB_NOBOOTRC;
1129
1130         if (PE_parse_boot_argn("-x", namep, sizeof (namep))) /* safe boot */
1131                 boothowto |= RB_SAFEBOOT;
1132
1133         if (PE_parse_boot_argn("-minimalboot", namep, sizeof(namep))) {
1134                 /*
1135                  * -minimalboot indicates that we want userspace to be bootstrapped to a
1136                  * minimal environment.  What constitutes minimal is up to the bootstrap
1137                  * process.
1138                  */
1139                 minimalboot = 1;
1140         }
1141
1142
1143         /* disable vnode_cache_is_authorized() by setting vnode_cache_defeat */
1144         if (PE_parse_boot_argn("-vnode_cache_defeat", namep, sizeof (namep)))
1145                 bootarg_vnode_cache_defeat = 1;
1146
1147 #if DEVELOPMENT || DEBUG
1148         if (PE_parse_boot_argn("-disable_aslr", namep, sizeof (namep)))
1149                 bootarg_disable_aslr = 1;
1150 #endif
1151
1152         PE_parse_boot_argn("ncl", &ncl, sizeof (ncl));
1153         if (PE_parse_boot_argn("nbuf", &max_nbuf_headers,
1154                                 sizeof (max_nbuf_headers))) {
1155                 customnbuf = 1;
1156         }
1157
1158 #if CONFIG_MACF
1159 #if defined (__i386__) || defined (__x86_64__)
1160         PE_parse_boot_argn("policy_check", &policy_check_flags, sizeof (policy_check_flags));
1161 #endif
1162 #endif  /* CONFIG_MACF */
1163
1164         if (PE_parse_boot_argn("msgbuf", &msgbuf, sizeof (msgbuf))) {
1165                 log_setsize(msgbuf);
1166         }
1167
1168         if (PE_parse_boot_argn("-novfscache", namep, sizeof(namep))) {
1169                 nc_disabled = 1;
1170         }
1171
1172 #if CONFIG_JETSAM && (DEVELOPMENT || DEBUG)
1173         if (PE_parse_boot_argn("-no_vnode_jetsam", namep, sizeof(namep)))
1174                  bootarg_no_vnode_jetsam = 1;
1175 #endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */
1176
1177
1178
1179 #if PROC_REF_DEBUG
1180         if (PE_parse_boot_argn("-disable_procref_tracking", namep, sizeof(namep))) {
1181                 proc_ref_tracking_disabled = 1;
1182         }
1183 #endif
1184
1185         PE_parse_boot_argn("sigrestrict", &sigrestrict_arg, sizeof(sigrestrict_arg));
1186 }
1187
1188 void
1189 bsd_exec_setup(int scale)
1190 {
1191
1192         switch (scale) {
1193                 case 0:
1194                 case 1:
1195                         bsd_simul_execs = BSD_SIMUL_EXECS;
1196                         break;
1197                 case 2:
1198                 case 3:
1199                         bsd_simul_execs = 65;
1200                         break;
1201                 case 4:
1202                 case 5:
1203                         bsd_simul_execs = 129;
1204                         break;
1205                 case 6:
1206                 case 7:
1207                         bsd_simul_execs = 257;
1208                         break;
1209                 default:
1210                         bsd_simul_execs = 513;
1211                         break;
1212
1213         }
1214         bsd_pageable_map_size = (bsd_simul_execs * BSD_PAGEABLE_SIZE_PER_EXEC);
1215 }
1216
1217 #if !NFSCLIENT
1218 int
1219 netboot_root(void);
1220
1221 int
1222 netboot_root(void)
1223 {
1224         return(0);
1225 }
1226 #endif