1/*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1995 Terrence R. Lambert 5 * All rights reserved. 6 * 7 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 8 * The Regents of the University of California. All rights reserved. 9 * (c) UNIX System Laboratories, Inc. 10 * All or some portions of this file are derived from material licensed 11 * to the University of California by American Telephone and Telegraph 12 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 13 * the permission of UNIX System Laboratories, Inc. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 */ 43 44#include "opt_ddb.h" 45#include "opt_kdb.h" 46#include "opt_init_path.h" 47#include "opt_verbose_sysinit.h" 48 49#include <sys/param.h> 50#include <sys/systm.h> 51#include <sys/boottrace.h> 52#include <sys/conf.h> 53#include <sys/cpuset.h> 54#include <sys/dtrace_bsd.h> 55#include <sys/epoch.h> 56#include <sys/eventhandler.h> 57#include <sys/exec.h> 58#include <sys/file.h> 59#include <sys/filedesc.h> 60#include <sys/imgact.h> 61#include <sys/jail.h> 62#include <sys/kernel.h> 63#include <sys/ktr.h> 64#include <sys/lock.h> 65#include <sys/loginclass.h> 66#include <sys/malloc.h> 67#include <sys/mount.h> 68#include <sys/mutex.h> 69#include <sys/proc.h> 70#include <sys/racct.h> 71#include <sys/reboot.h> 72#include <sys/resourcevar.h> 73#include <sys/queue.h> 74#include <sys/queue_mergesort.h> 75#include <sys/sched.h> 76#include <sys/signalvar.h> 77#include <sys/sx.h> 78#include <sys/syscallsubr.h> 79#include <sys/sysctl.h> 80#include <sys/sysent.h> 81#include <sys/sysproto.h> 82#include <sys/unistd.h> 83#include <sys/vmmeter.h> 84#include <sys/vnode.h> 85 86#include <machine/cpu.h> 87 88#include <security/audit/audit.h> 89#include <security/mac/mac_framework.h> 90 91#include <vm/vm.h> 92#include <vm/vm_param.h> 93#include <vm/vm_extern.h> 94#include <vm/pmap.h> 95#include <vm/vm_map.h> 96#include <sys/copyright.h> 97 98#include <ddb/ddb.h> 99#include <ddb/db_sym.h> 100 101void mi_startup(void); /* Should be elsewhere */ 102 103/* Components of the first process -- never freed. */ 104static struct session session0; 105static struct pgrp pgrp0; 106struct proc proc0; 107struct thread0_storage thread0_st __aligned(32); 108struct vmspace vmspace0; 109struct proc *initproc; 110 111int 112linux_alloc_current_noop(struct thread *td __unused, int flags __unused) 113{ 114 return (0); 115} 116int (*lkpi_alloc_current)(struct thread *, int) = linux_alloc_current_noop; 117 118#ifndef BOOTHOWTO 119#define BOOTHOWTO 0 120#endif 121int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 122SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 123 "Boot control flags, passed from loader"); 124 125#ifndef BOOTVERBOSE 126#define BOOTVERBOSE 0 127#endif 128int bootverbose = BOOTVERBOSE; 129SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 130 "Control the output of verbose kernel messages"); 131 132#ifdef VERBOSE_SYSINIT 133/* 134 * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to 135 * dictate the default VERBOSE_SYSINIT behavior. Significant values for this 136 * option and associated tunable are: 137 * - 0, 'compiled in but silent by default' 138 * - 1, 'compiled in but verbose by default' (default) 139 */ 140int verbose_sysinit = VERBOSE_SYSINIT; 141TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit); 142#endif 143 144#ifdef INVARIANTS 145FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 146#endif 147 148/* 149 * This ensures that there is at least one entry so that the sysinit_set 150 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 151 * executed. 152 */ 153SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 154 155/* 156 * The sysinit linker set compiled into the kernel. These are placed onto the 157 * sysinit list by mi_startup; sysinit_add can add (e.g., from klds) additional 158 * sysinits to the linked list but the linker set here does not change. 159 */ 160SET_DECLARE(sysinit_set, struct sysinit); 161 162/* 163 * The sysinit lists. Items are moved to sysinit_done_list when done. 164 */ 165static STAILQ_HEAD(sysinitlist, sysinit) sysinit_list; 166static struct sysinitlist sysinit_done_list = 167 STAILQ_HEAD_INITIALIZER(sysinit_done_list); 168 169/* 170 * Compare two sysinits; return -1, 0, or 1 if a comes before, at the same time 171 * as, or after b. 172 */ 173static int 174sysinit_compar(struct sysinit *a, struct sysinit *b, void *thunk __unused) 175{ 176 177 if (a->subsystem < b->subsystem) 178 return (-1); 179 if (a->subsystem > b->subsystem) 180 return (1); 181 if (a->order < b->order) 182 return (-1); 183 if (a->order > b->order) 184 return (1); 185 return (0); 186} 187 188static void 189sysinit_mklist(struct sysinitlist *list, struct sysinit **set, 190 struct sysinit **set_end) 191{ 192 struct sysinit **sipp; 193 194 TSENTER(); 195 TSENTER2("listify"); 196 STAILQ_INIT(list); 197 for (sipp = set; sipp < set_end; sipp++) 198 STAILQ_INSERT_TAIL(list, *sipp, next); 199 TSEXIT2("listify"); 200 TSENTER2("mergesort"); 201 STAILQ_MERGESORT(list, NULL, sysinit_compar, sysinit, next); 202 TSEXIT2("mergesort"); 203 TSEXIT(); 204} 205 206/* 207 * Merge a new sysinit set into the sysinit list. 208 */ 209void 210sysinit_add(struct sysinit **set, struct sysinit **set_end) 211{ 212 struct sysinitlist new_list; 213 214 TSENTER(); 215 216 /* Construct a sorted list from the new sysinits. */ 217 sysinit_mklist(&new_list, set, set_end); 218 219 /* Merge the new list into the existing one. */ 220 TSENTER2("STAILQ_MERGE"); 221 STAILQ_MERGE(&sysinit_list, &new_list, NULL, sysinit_compar, sysinit, next); 222 TSEXIT2("STAILQ_MERGE"); 223 224 TSEXIT(); 225} 226 227#if defined (DDB) && defined(VERBOSE_SYSINIT) 228static const char * 229symbol_name(vm_offset_t va, db_strategy_t strategy) 230{ 231 const char *name; 232 c_db_sym_t sym; 233 db_expr_t offset; 234 235 if (va == 0) 236 return (NULL); 237 sym = db_search_symbol(va, strategy, &offset); 238 if (offset != 0) 239 return (NULL); 240 db_symbol_values(sym, &name, NULL); 241 return (name); 242} 243#endif 244 245/* 246 * System startup; initialize the world, create process 0, mount root 247 * filesystem, and fork to create init and pagedaemon. Most of the 248 * hard work is done in the lower-level initialization routines including 249 * startup(), which does memory initialization and autoconfiguration. 250 * 251 * This allows simple addition of new kernel subsystems that require 252 * boot time initialization. It also allows substitution of subsystem 253 * (for instance, a scheduler, kernel profiler, or VM system) by object 254 * module. Finally, it allows for optional "kernel threads". 255 */ 256void 257mi_startup(void) 258{ 259 260 struct sysinit *sip; 261 int last; 262#if defined(VERBOSE_SYSINIT) 263 int verbose; 264#endif 265 266 TSENTER(); 267 268 if (boothowto & RB_VERBOSE) 269 bootverbose++; 270 271 /* Construct and sort sysinit list. */ 272 sysinit_mklist(&sysinit_list, SET_BEGIN(sysinit_set), SET_LIMIT(sysinit_set)); 273 274 last = SI_SUB_COPYRIGHT; 275#if defined(VERBOSE_SYSINIT) 276 verbose = 0; 277#if !defined(DDB) 278 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 279#endif 280#endif 281 282 /* 283 * Perform each system initialization task from the ordered list. Note 284 * that if sysinit_list is modified (e.g. by a KLD) we will nonetheless 285 * always perform the earlist-sorted sysinit at each step; using the 286 * STAILQ_FOREACH macro would result in items being skipped if inserted 287 * earlier than the "current item". 288 */ 289 while ((sip = STAILQ_FIRST(&sysinit_list)) != NULL) { 290 STAILQ_REMOVE_HEAD(&sysinit_list, next); 291 STAILQ_INSERT_TAIL(&sysinit_done_list, sip, next); 292 293 if (sip->subsystem == SI_SUB_DUMMY) 294 continue; /* skip dummy task(s)*/ 295 296 if (sip->subsystem > last) 297 BOOTTRACE_INIT("sysinit 0x%7x", sip->subsystem); 298 299#if defined(VERBOSE_SYSINIT) 300 if (sip->subsystem > last && verbose_sysinit != 0) { 301 verbose = 1; 302 printf("subsystem %x\n", last); 303 } 304 if (verbose) { 305#if defined(DDB) 306 const char *func, *data; 307 308 func = symbol_name((vm_offset_t)sip->func, 309 DB_STGY_PROC); 310 data = symbol_name((vm_offset_t)sip->udata, 311 DB_STGY_ANY); 312 if (func != NULL && data != NULL) 313 printf(" %s(&%s)... ", func, data); 314 else if (func != NULL) 315 printf(" %s(%p)... ", func, sip->udata); 316 else 317#endif 318 printf(" %p(%p)... ", sip->func, 319 sip->udata); 320 } 321#endif 322 323 /* Call function */ 324 (*(sip->func))(sip->udata); 325 326#if defined(VERBOSE_SYSINIT) 327 if (verbose) 328 printf("done.\n"); 329#endif 330 331 /* Check off the one we're just done */ 332 last = sip->subsystem; 333 } 334 335 TSEXIT(); /* Here so we don't overlap with start_init. */ 336 BOOTTRACE("mi_startup done"); 337 338 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 339 mtx_unlock(&Giant); 340 341 /* 342 * Now hand over this thread to swapper. 343 */ 344 swapper(); 345 /* NOTREACHED*/ 346} 347 348static void 349print_caddr_t(void *data) 350{ 351 printf("%s", (char *)data); 352} 353 354static void 355print_version(void *data __unused) 356{ 357 int len; 358 359 /* Strip a trailing newline from version. */ 360 len = strlen(version); 361 while (len > 0 && version[len - 1] == '\n') 362 len--; 363 printf("%.*s %s\n", len, version, machine); 364 printf("%s\n", compiler_version); 365} 366 367SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 368 copyright); 369SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 370 trademark); 371SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 372 373#ifdef WITNESS 374static char wit_warn[] = 375 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 376SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH, 377 print_caddr_t, wit_warn); 378SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH, 379 print_caddr_t, wit_warn); 380#endif 381 382#ifdef DIAGNOSTIC 383static char diag_warn[] = 384 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 385SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 386 print_caddr_t, diag_warn); 387SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH, 388 print_caddr_t, diag_warn); 389#endif 390 391#if __SIZEOF_LONG__ == 4 392static char ilp32_warn[] = 393 "WARNING: 32-bit kernels are deprecated and may be removed in FreeBSD 15.0.\n"; 394SYSINIT(ilp32warn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 395 print_caddr_t, ilp32_warn); 396SYSINIT(ilp32warn2, SI_SUB_LAST, SI_ORDER_FIFTH, 397 print_caddr_t, ilp32_warn); 398#endif 399 400static int 401null_fetch_syscall_args(struct thread *td __unused) 402{ 403 404 panic("null_fetch_syscall_args"); 405} 406 407static void 408null_set_syscall_retval(struct thread *td __unused, int error __unused) 409{ 410 411 panic("null_set_syscall_retval"); 412} 413 414static void 415null_set_fork_retval(struct thread *td __unused) 416{ 417 418} 419 420struct sysentvec null_sysvec = { 421 .sv_size = 0, 422 .sv_table = NULL, 423 .sv_fixup = NULL, 424 .sv_sendsig = NULL, 425 .sv_sigcode = NULL, 426 .sv_szsigcode = NULL, 427 .sv_name = "null", 428 .sv_coredump = NULL, 429 .sv_minsigstksz = 0, 430 .sv_minuser = VM_MIN_ADDRESS, 431 .sv_maxuser = VM_MAXUSER_ADDRESS, 432 .sv_usrstack = USRSTACK, 433 .sv_psstrings = PS_STRINGS, 434 .sv_psstringssz = sizeof(struct ps_strings), 435 .sv_stackprot = VM_PROT_ALL, 436 .sv_copyout_strings = NULL, 437 .sv_setregs = NULL, 438 .sv_fixlimit = NULL, 439 .sv_maxssiz = NULL, 440 .sv_flags = 0, 441 .sv_set_syscall_retval = null_set_syscall_retval, 442 .sv_fetch_syscall_args = null_fetch_syscall_args, 443 .sv_syscallnames = NULL, 444 .sv_schedtail = NULL, 445 .sv_thread_detach = NULL, 446 .sv_trap = NULL, 447 .sv_set_fork_retval = null_set_fork_retval, 448 .sv_regset_begin = NULL, 449 .sv_regset_end = NULL, 450}; 451 452/* 453 * The two following SYSINIT's are proc0 specific glue code. I am not 454 * convinced that they can not be safely combined, but their order of 455 * operation has been maintained as the same as the original init_main.c 456 * for right now. 457 */ 458/* ARGSUSED*/ 459static void 460proc0_init(void *dummy __unused) 461{ 462 struct proc *p; 463 struct thread *td; 464 struct ucred *newcred; 465 struct uidinfo tmpuinfo; 466 struct loginclass tmplc = { 467 .lc_name = "", 468 }; 469 vm_paddr_t pageablemem; 470 int i; 471 472 GIANT_REQUIRED; 473 p = &proc0; 474 td = &thread0; 475 476 /* 477 * Initialize magic number and osrel. 478 */ 479 p->p_magic = P_MAGIC; 480 p->p_osrel = osreldate; 481 482 /* 483 * Initialize thread and process structures. 484 */ 485 procinit(); /* set up proc zone */ 486 threadinit(); /* set up UMA zones */ 487 488 /* 489 * Initialise scheduler resources. 490 * Add scheduler specific parts to proc, thread as needed. 491 */ 492 schedinit(); /* scheduler gets its house in order */ 493 494 /* 495 * Create process 0 (the swapper). 496 */ 497 LIST_INSERT_HEAD(&allproc, p, p_list); 498 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 499 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 500 sx_init(&pgrp0.pg_killsx, "killpg racer"); 501 p->p_pgrp = &pgrp0; 502 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 503 LIST_INIT(&pgrp0.pg_members); 504 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 505 506 pgrp0.pg_session = &session0; 507 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 508 refcount_init(&session0.s_count, 1); 509 session0.s_leader = p; 510 511 p->p_sysent = &null_sysvec; 512 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 513 p->p_flag2 = 0; 514 p->p_state = PRS_NORMAL; 515 p->p_klist = knlist_alloc(&p->p_mtx); 516 STAILQ_INIT(&p->p_ktr); 517 p->p_nice = NZERO; 518 td->td_tid = THREAD0_TID; 519 tidhash_add(td); 520 TD_SET_STATE(td, TDS_RUNNING); 521 td->td_pri_class = PRI_TIMESHARE; 522 td->td_user_pri = PUSER; 523 td->td_base_user_pri = PUSER; 524 td->td_lend_user_pri = PRI_MAX; 525 td->td_priority = PVM; 526 td->td_base_pri = PVM; 527 td->td_oncpu = curcpu; 528 td->td_flags = TDF_INMEM; 529 td->td_pflags = TDP_KTHREAD; 530 td->td_cpuset = cpuset_thread0(); 531 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 532 prison0_init(); 533 p->p_peers = 0; 534 p->p_leader = p; 535 p->p_reaper = p; 536 p->p_treeflag |= P_TREE_REAPER; 537 LIST_INIT(&p->p_reaplist); 538 539 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 540 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 541 542 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 543 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 544 callout_init(&td->td_slpcallout, 1); 545 TAILQ_INIT(&p->p_kqtim_stop); 546 547 /* Create credentials. */ 548 newcred = crget(); 549 newcred->cr_ngroups = 1; /* group 0 */ 550 /* A hack to prevent uifind from tripping over NULL pointers. */ 551 curthread->td_ucred = newcred; 552 tmpuinfo.ui_uid = 1; 553 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 554 newcred->cr_uidinfo = uifind(0); 555 newcred->cr_ruidinfo = uifind(0); 556 newcred->cr_loginclass = &tmplc; 557 newcred->cr_loginclass = loginclass_find("default"); 558 /* End hack. creds get properly set later with thread_cow_get_proc */ 559 curthread->td_ucred = NULL; 560 newcred->cr_prison = &prison0; 561 newcred->cr_users++; /* avoid assertion failure */ 562 p->p_ucred = crcowget(newcred); 563 newcred->cr_users--; 564 crfree(newcred); 565#ifdef AUDIT 566 audit_cred_kproc0(newcred); 567#endif 568#ifdef MAC 569 mac_cred_create_swapper(newcred); 570#endif 571 /* Create sigacts. */ 572 p->p_sigacts = sigacts_alloc(); 573 574 /* Initialize signal state for process 0. */ 575 siginit(&proc0); 576 577 /* Create the file descriptor table. */ 578 p->p_pd = pdinit(NULL, false); 579 p->p_fd = fdinit(); 580 p->p_fdtol = NULL; 581 582 /* Create the limits structures. */ 583 p->p_limit = lim_alloc(); 584 for (i = 0; i < RLIM_NLIMITS; i++) 585 p->p_limit->pl_rlimit[i].rlim_cur = 586 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 587 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 588 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 589 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 590 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 591 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 592 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 593 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 594 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 595 /* Cast to avoid overflow on i386/PAE. */ 596 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 597 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 598 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 599 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 600 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 601 p->p_cpulimit = RLIM_INFINITY; 602 603 PROC_LOCK(p); 604 thread_cow_get_proc(td, p); 605 PROC_UNLOCK(p); 606 607 /* Initialize resource accounting structures. */ 608 racct_create(&p->p_racct); 609 610 p->p_stats = pstats_alloc(); 611 612 /* Allocate a prototype map so we have something to fork. */ 613 p->p_vmspace = &vmspace0; 614 refcount_init(&vmspace0.vm_refcnt, 1); 615 pmap_pinit0(vmspace_pmap(&vmspace0)); 616 617 /* 618 * proc0 is not expected to enter usermode, so there is no special 619 * handling for sv_minuser here, like is done for exec_new_vmspace(). 620 */ 621 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 622 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 623 624 /* 625 * Call the init and ctor for the new thread and proc. We wait 626 * to do this until all other structures are fairly sane. 627 */ 628 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 629 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 630#ifdef KDTRACE_HOOKS 631 kdtrace_proc_ctor(p); 632 kdtrace_thread_ctor(td); 633#endif 634 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 635 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 636 637 /* 638 * Charge root for one process. 639 */ 640 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 641 PROC_LOCK(p); 642 racct_add_force(p, RACCT_NPROC, 1); 643 PROC_UNLOCK(p); 644} 645SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 646 647/* ARGSUSED*/ 648static void 649proc0_post(void *dummy __unused) 650{ 651 struct proc *p; 652 struct rusage ru; 653 struct thread *td; 654 655 /* 656 * Now we can look at the time, having had a chance to verify the 657 * time from the filesystem. Pretend that proc0 started now. 658 */ 659 sx_slock(&allproc_lock); 660 FOREACH_PROC_IN_SYSTEM(p) { 661 PROC_LOCK(p); 662 if (p->p_state == PRS_NEW) { 663 PROC_UNLOCK(p); 664 continue; 665 } 666 microuptime(&p->p_stats->p_start); 667 PROC_STATLOCK(p); 668 rufetch(p, &ru); /* Clears thread stats */ 669 p->p_rux.rux_runtime = 0; 670 p->p_rux.rux_uticks = 0; 671 p->p_rux.rux_sticks = 0; 672 p->p_rux.rux_iticks = 0; 673 PROC_STATUNLOCK(p); 674 FOREACH_THREAD_IN_PROC(p, td) { 675 td->td_runtime = 0; 676 } 677 PROC_UNLOCK(p); 678 } 679 sx_sunlock(&allproc_lock); 680 PCPU_SET(switchtime, cpu_ticks()); 681 PCPU_SET(switchticks, ticks); 682} 683SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 684 685/* 686 *************************************************************************** 687 **** 688 **** The following SYSINIT's and glue code should be moved to the 689 **** respective files on a per subsystem basis. 690 **** 691 *************************************************************************** 692 */ 693 694/* 695 * List of paths to try when searching for "init". 696 */ 697static char init_path[MAXPATHLEN] = 698#ifdef INIT_PATH 699 __XSTRING(INIT_PATH); 700#else 701 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 702#endif 703SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 704 "Path used to search the init process"); 705 706/* 707 * Shutdown timeout of init(8). 708 * Unused within kernel, but used to control init(8), hence do not remove. 709 */ 710#ifndef INIT_SHUTDOWN_TIMEOUT 711#define INIT_SHUTDOWN_TIMEOUT 120 712#endif 713static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 714SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 715 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 716 "Unused within kernel, but used to control init(8)"); 717 718/* 719 * Start the initial user process; try exec'ing each pathname in init_path. 720 * The program is invoked with one argument containing the boot flags. 721 */ 722static void 723start_init(void *dummy) 724{ 725 struct image_args args; 726 int error; 727 char *var, *path; 728 char *free_init_path, *tmp_init_path; 729 struct thread *td; 730 struct proc *p; 731 struct vmspace *oldvmspace; 732 733 TSENTER(); /* Here so we don't overlap with mi_startup. */ 734 735 td = curthread; 736 p = td->td_proc; 737 738 vfs_mountroot(); 739 740 /* Wipe GELI passphrase from the environment. */ 741 kern_unsetenv("kern.geom.eli.passphrase"); 742 743 /* For Multicons, report which console is primary to both */ 744 if (boothowto & RB_MULTIPLE) { 745 if (boothowto & RB_SERIAL) 746 printf("Dual Console: Serial Primary, Video Secondary\n"); 747 else 748 printf("Dual Console: Video Primary, Serial Secondary\n"); 749 } 750 751 if ((var = kern_getenv("init_path")) != NULL) { 752 strlcpy(init_path, var, sizeof(init_path)); 753 freeenv(var); 754 } 755 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 756 757 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 758 if (bootverbose) 759 printf("start_init: trying %s\n", path); 760 761 memset(&args, 0, sizeof(args)); 762 error = exec_alloc_args(&args); 763 if (error != 0) 764 panic("%s: Can't allocate space for init arguments %d", 765 __func__, error); 766 767 error = exec_args_add_fname(&args, path, UIO_SYSSPACE); 768 if (error != 0) 769 panic("%s: Can't add fname %d", __func__, error); 770 error = exec_args_add_arg(&args, path, UIO_SYSSPACE); 771 if (error != 0) 772 panic("%s: Can't add argv[0] %d", __func__, error); 773 if (boothowto & RB_SINGLE) 774 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE); 775 if (error != 0) 776 panic("%s: Can't add argv[0] %d", __func__, error); 777 778 /* 779 * Now try to exec the program. If can't for any reason 780 * other than it doesn't exist, complain. 781 * 782 * Otherwise, return via fork_trampoline() all the way 783 * to user mode as init! 784 */ 785 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0, 786 ("nested execve")); 787 memset(td->td_frame, 0, sizeof(*td->td_frame)); 788 oldvmspace = p->p_vmspace; 789 error = kern_execve(td, &args, NULL, oldvmspace); 790 KASSERT(error != 0, 791 ("kern_execve returned success, not EJUSTRETURN")); 792 if (error == EJUSTRETURN) { 793 exec_cleanup(td, oldvmspace); 794 free(free_init_path, M_TEMP); 795 TSEXIT(); 796 return; 797 } 798 if (error != ENOENT) 799 printf("exec %s: error %d\n", path, error); 800 } 801 free(free_init_path, M_TEMP); 802 printf("init: not found in path %s\n", init_path); 803 panic("no init"); 804} 805 806/* 807 * Like kproc_create(), but runs in its own address space. We do this 808 * early to reserve pid 1. Note special case - do not make it 809 * runnable yet, init execution is started when userspace can be served. 810 */ 811static void 812create_init(const void *udata __unused) 813{ 814 struct fork_req fr; 815 struct ucred *newcred, *oldcred; 816 struct thread *td; 817 int error; 818 819 bzero(&fr, sizeof(fr)); 820 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 821 fr.fr_procp = &initproc; 822 error = fork1(&thread0, &fr); 823 if (error) 824 panic("cannot fork init: %d\n", error); 825 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 826 /* divorce init's credentials from the kernel's */ 827 newcred = crget(); 828 sx_xlock(&proctree_lock); 829 PROC_LOCK(initproc); 830 initproc->p_flag |= P_SYSTEM | P_INMEM; 831 initproc->p_treeflag |= P_TREE_REAPER; 832 oldcred = initproc->p_ucred; 833 crcopy(newcred, oldcred); 834#ifdef MAC 835 mac_cred_create_init(newcred); 836#endif 837#ifdef AUDIT 838 audit_cred_proc1(newcred); 839#endif 840 proc_set_cred(initproc, newcred); 841 td = FIRST_THREAD_IN_PROC(initproc); 842 crcowfree(td); 843 td->td_realucred = crcowget(initproc->p_ucred); 844 td->td_ucred = td->td_realucred; 845 PROC_UNLOCK(initproc); 846 sx_xunlock(&proctree_lock); 847 crfree(oldcred); 848 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 849 start_init, NULL); 850} 851SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 852 853/* 854 * Make it runnable now. 855 */ 856static void 857kick_init(const void *udata __unused) 858{ 859 struct thread *td; 860 861 td = FIRST_THREAD_IN_PROC(initproc); 862 thread_lock(td); 863 TD_SET_CAN_RUN(td); 864 sched_add(td, SRQ_BORING); 865} 866SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 867 868/* 869 * DDB(4). 870 */ 871#ifdef DDB 872static void 873db_show_print_syinit(struct sysinit *sip, bool ddb) 874{ 875 const char *sname, *funcname; 876 c_db_sym_t sym; 877 db_expr_t offset; 878 879#define xprint(...) \ 880 if (ddb) \ 881 db_printf(__VA_ARGS__); \ 882 else \ 883 printf(__VA_ARGS__) 884 885 if (sip == NULL) { 886 xprint("%s: no sysinit * given\n", __func__); 887 return; 888 } 889 890 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); 891 db_symbol_values(sym, &sname, NULL); 892 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); 893 db_symbol_values(sym, &funcname, NULL); 894 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); 895 xprint(" %#08x %#08x\n", sip->subsystem, sip->order); 896 xprint(" %p(%s)(%p)\n", 897 sip->func, (funcname != NULL) ? funcname : "", sip->udata); 898#undef xprint 899} 900 901DB_SHOW_COMMAND_FLAGS(sysinit, db_show_sysinit, DB_CMD_MEMSAFE) 902{ 903 struct sysinit *sip; 904 905 db_printf("SYSINIT vs Name(Ptr)\n"); 906 db_printf(" Subsystem Order\n"); 907 db_printf(" Function(Name)(Arg)\n"); 908 STAILQ_FOREACH(sip, &sysinit_done_list, next) { 909 db_show_print_syinit(sip, true); 910 if (db_pager_quit) 911 return; 912 } 913 STAILQ_FOREACH(sip, &sysinit_list, next) { 914 db_show_print_syinit(sip, true); 915 if (db_pager_quit) 916 break; 917 } 918} 919#endif /* DDB */ 920