1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1988 AT&T */ 27 /* All Rights Reserved */ 28 29 30 #include <sys/types.h> 31 #include <sys/param.h> 32 #include <sys/sysmacros.h> 33 #include <sys/pcb.h> 34 #include <sys/systm.h> 35 #include <sys/signal.h> 36 #include <sys/cred.h> 37 #include <sys/user.h> 38 #include <sys/vfs.h> 39 #include <sys/vnode.h> 40 #include <sys/proc.h> 41 #include <sys/time.h> 42 #include <sys/file.h> 43 #include <sys/priocntl.h> 44 #include <sys/procset.h> 45 #include <sys/disp.h> 46 #include <sys/callo.h> 47 #include <sys/callb.h> 48 #include <sys/debug.h> 49 #include <sys/conf.h> 50 #include <sys/bootconf.h> 51 #include <sys/utsname.h> 52 #include <sys/cmn_err.h> 53 #include <sys/vmparam.h> 54 #include <sys/modctl.h> 55 #include <sys/vm.h> 56 #include <sys/callb.h> 57 #include <sys/ddi_timer.h> 58 #include <sys/kmem.h> 59 #include <sys/vmem.h> 60 #include <sys/cpuvar.h> 61 #include <sys/cladm.h> 62 #include <sys/corectl.h> 63 #include <sys/exec.h> 64 #include <sys/syscall.h> 65 #include <sys/reboot.h> 66 #include <sys/task.h> 67 #include <sys/exacct.h> 68 #include <sys/autoconf.h> 69 #include <sys/errorq.h> 70 #include <sys/class.h> 71 #include <sys/stack.h> 72 #include <sys/brand.h> 73 74 #include <vm/as.h> 75 #include <vm/seg_kmem.h> 76 #include <sys/dc_ki.h> 77 78 #include <c2/audit.h> 79 80 /* well known processes */ 81 proc_t *proc_sched; /* memory scheduler */ 82 proc_t *proc_init; /* init */ 83 proc_t *proc_pageout; /* pageout daemon */ 84 proc_t *proc_fsflush; /* fsflush daemon */ 85 86 pgcnt_t maxmem; /* Maximum available memory in pages. */ 87 pgcnt_t freemem; /* Current available memory in pages. */ 88 int audit_active; 89 int interrupts_unleashed; /* set when we do the first spl0() */ 90 91 kmem_cache_t *process_cache; /* kmem cache for proc structures */ 92 93 /* 94 * Process 0's lwp directory and lwpid hash table. 95 */ 96 lwpdir_t p0_lwpdir[2]; 97 lwpdir_t *p0_tidhash[2]; 98 lwpent_t p0_lep; 99 100 /* 101 * Machine-independent initialization code 102 * Called from cold start routine as 103 * soon as a stack and segmentation 104 * have been established. 105 * Functions: 106 * clear and free user core 107 * turn on clock 108 * hand craft 0th process 109 * call all initialization routines 110 * fork - process 0 to schedule 111 * - process 1 execute bootstrap 112 * - process 2 to page out 113 * create system threads 114 */ 115 116 int cluster_bootflags = 0; 117 118 void 119 cluster_wrapper(void) 120 { 121 cluster(); 122 panic("cluster() returned"); 123 } 124 125 char initname[INITNAME_SZ] = "/sbin/init"; /* also referenced by zone0 */ 126 char initargs[BOOTARGS_MAX] = ""; /* also referenced by zone0 */ 127 extern int64_t lwp_sigmask(int, uint_t, uint_t); 128 129 /* 130 * Construct a stack for init containing the arguments to it, then 131 * pass control to exec_common. 132 */ 133 int 134 exec_init(const char *initpath, const char *args) 135 { 136 caddr32_t ucp; 137 caddr32_t *uap; 138 caddr32_t *argv; 139 caddr32_t exec_fnamep; 140 char *scratchargs; 141 int i, sarg; 142 size_t argvlen, alen; 143 boolean_t in_arg; 144 int argc = 0; 145 int error = 0, count = 0; 146 proc_t *p = ttoproc(curthread); 147 klwp_t *lwp = ttolwp(curthread); 148 int brand_action; 149 150 if (args == NULL) 151 args = ""; 152 153 alen = strlen(initpath) + 1 + strlen(args) + 1; 154 scratchargs = kmem_alloc(alen, KM_SLEEP); 155 (void) snprintf(scratchargs, alen, "%s %s", initpath, args); 156 157 /* 158 * We do a quick two state parse of the string to sort out how big 159 * argc should be. 160 */ 161 in_arg = B_FALSE; 162 for (i = 0; i < strlen(scratchargs); i++) { 163 if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { 164 if (in_arg) { 165 in_arg = B_FALSE; 166 argc++; 167 } 168 } else { 169 in_arg = B_TRUE; 170 } 171 } 172 argvlen = sizeof (caddr32_t) * (argc + 1); 173 argv = kmem_zalloc(argvlen, KM_SLEEP); 174 175 /* 176 * We pull off a bit of a hack here. We work our way through the 177 * args string, putting nulls at the ends of space delimited tokens 178 * (boot args don't support quoting at this time). Then we just 179 * copy the whole mess to userland in one go. In other words, we 180 * transform this: "init -s -r\0" into this on the stack: 181 * 182 * -0x00 \0 183 * -0x01 r 184 * -0x02 - <--------. 185 * -0x03 \0 | 186 * -0x04 s | 187 * -0x05 - <------. | 188 * -0x06 \0 | | 189 * -0x07 t | | 190 * -0x08 i | | 191 * -0x09 n | | 192 * -0x0a i <---. | | 193 * -0x10 NULL | | | (argv[3]) 194 * -0x14 -----|--|-' (argv[2]) 195 * -0x18 ------|--' (argv[1]) 196 * -0x1c -------' (argv[0]) 197 * 198 * Since we know the value of ucp at the beginning of this process, 199 * we can trivially compute the argv[] array which we also need to 200 * place in userland: argv[i] = ucp - sarg(i), where ucp is the 201 * stack ptr, and sarg is the string index of the start of the 202 * argument. 203 */ 204 ucp = (caddr32_t)(uintptr_t)p->p_usrstack; 205 206 argc = 0; 207 in_arg = B_FALSE; 208 sarg = 0; 209 210 for (i = 0; i < alen; i++) { 211 if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { 212 if (in_arg == B_TRUE) { 213 in_arg = B_FALSE; 214 scratchargs[i] = '\0'; 215 argv[argc++] = ucp - (alen - sarg); 216 } 217 } else if (in_arg == B_FALSE) { 218 in_arg = B_TRUE; 219 sarg = i; 220 } 221 } 222 ucp -= alen; 223 error |= copyout(scratchargs, (caddr_t)(uintptr_t)ucp, alen); 224 225 uap = (caddr32_t *)P2ALIGN((uintptr_t)ucp, sizeof (caddr32_t)); 226 uap--; /* advance to be below the word we're in */ 227 uap -= (argc + 1); /* advance argc words down, plus one for NULL */ 228 error |= copyout(argv, uap, argvlen); 229 230 if (error != 0) { 231 zcmn_err(p->p_zone->zone_id, CE_WARN, 232 "Could not construct stack for init.\n"); 233 kmem_free(argv, argvlen); 234 kmem_free(scratchargs, alen); 235 return (EFAULT); 236 } 237 238 exec_fnamep = argv[0]; 239 kmem_free(argv, argvlen); 240 kmem_free(scratchargs, alen); 241 242 /* 243 * Point at the arguments. 244 */ 245 lwp->lwp_ap = lwp->lwp_arg; 246 lwp->lwp_arg[0] = (uintptr_t)exec_fnamep; 247 lwp->lwp_arg[1] = (uintptr_t)uap; 248 lwp->lwp_arg[2] = NULL; 249 curthread->t_post_sys = 1; 250 curthread->t_sysnum = SYS_execve; 251 252 /* 253 * If we are executing init from zsched, we may have inherited its 254 * parent process's signal mask. Clear it now so that we behave in 255 * the same way as when started from the global zone. 256 */ 257 (void) lwp_sigmask(SIG_UNBLOCK, 0xffffffff, 0xffffffff); 258 259 brand_action = ZONE_IS_BRANDED(p->p_zone) ? EBA_BRAND : EBA_NONE; 260 again: 261 error = exec_common((const char *)(uintptr_t)exec_fnamep, 262 (const char **)(uintptr_t)uap, NULL, brand_action); 263 264 /* 265 * Normally we would just set lwp_argsaved and t_post_sys and 266 * let post_syscall reset lwp_ap for us. Unfortunately, 267 * exec_init isn't always called from a system call. Instead 268 * of making a mess of trap_cleanup, we just reset the args 269 * pointer here. 270 */ 271 reset_syscall_args(); 272 273 switch (error) { 274 case 0: 275 return (0); 276 277 case ENOENT: 278 zcmn_err(p->p_zone->zone_id, CE_WARN, 279 "exec(%s) failed (file not found).\n", initpath); 280 return (ENOENT); 281 282 case EAGAIN: 283 case EINTR: 284 ++count; 285 if (count < 5) { 286 zcmn_err(p->p_zone->zone_id, CE_WARN, 287 "exec(%s) failed with errno %d. Retrying...\n", 288 initpath, error); 289 goto again; 290 } 291 } 292 293 zcmn_err(p->p_zone->zone_id, CE_WARN, 294 "exec(%s) failed with errno %d.", initpath, error); 295 return (error); 296 } 297 298 /* 299 * This routine does all of the common setup for invoking init; global 300 * and non-global zones employ this routine for the functionality which is 301 * in common. 302 * 303 * This program (init, presumably) must be a 32-bit process. 304 */ 305 int 306 start_init_common() 307 { 308 proc_t *p = curproc; 309 ASSERT_STACK_ALIGNED(); 310 p->p_zone->zone_proc_initpid = p->p_pid; 311 312 p->p_cstime = p->p_stime = p->p_cutime = p->p_utime = 0; 313 p->p_usrstack = (caddr_t)USRSTACK32; 314 p->p_model = DATAMODEL_ILP32; 315 p->p_stkprot = PROT_ZFOD & ~PROT_EXEC; 316 p->p_datprot = PROT_ZFOD & ~PROT_EXEC; 317 p->p_stk_ctl = INT32_MAX; 318 319 p->p_as = as_alloc(); 320 p->p_as->a_proc = p; 321 p->p_as->a_userlimit = (caddr_t)USERLIMIT32; 322 (void) hat_setup(p->p_as->a_hat, HAT_INIT); 323 324 init_core(); 325 326 init_mstate(curthread, LMS_SYSTEM); 327 return (exec_init(p->p_zone->zone_initname, p->p_zone->zone_bootargs)); 328 } 329 330 /* 331 * Start the initial user process for the global zone; once running, if 332 * init should subsequently fail, it will be automatically be caught in the 333 * exit(2) path, and restarted by restart_init(). 334 */ 335 static void 336 start_init(void) 337 { 338 proc_init = curproc; 339 340 ASSERT(curproc->p_zone->zone_initname != NULL); 341 342 if (start_init_common() != 0) 343 halt("unix: Could not start init"); 344 lwp_rtt(); 345 } 346 347 #if defined(__i386) || defined(__amd64) 348 extern void return_instr(void); 349 void (*rootnex_iommu_add_intr)(void) = (void (*)(void))return_instr; 350 #endif 351 352 void 353 main(void) 354 { 355 proc_t *p = ttoproc(curthread); /* &p0 */ 356 int (**initptr)(); 357 extern void sched(); 358 extern void fsflush(); 359 extern int (*init_tbl[])(); 360 extern int (*mp_init_tbl[])(); 361 extern id_t syscid, defaultcid; 362 extern int swaploaded; 363 extern int netboot; 364 extern void vm_init(void); 365 extern void cbe_init_pre(void); 366 extern void cbe_init(void); 367 extern void clock_tick_init_pre(void); 368 extern void clock_tick_init_post(void); 369 extern void clock_init(void); 370 extern void physio_bufs_init(void); 371 extern void pm_cfb_setup_intr(void); 372 extern int pm_adjust_timestamps(dev_info_t *, void *); 373 extern void start_other_cpus(int); 374 extern void sysevent_evc_thrinit(); 375 extern void lgrp_main_init(void); 376 extern void lgrp_main_mp_init(void); 377 #if defined(__x86) 378 extern void cpupm_post_startup(void); 379 #endif 380 /* 381 * In the horrible world of x86 in-lines, you can't get symbolic 382 * structure offsets a la genassym. This assertion is here so 383 * that the next poor slob who innocently changes the offset of 384 * cpu_thread doesn't waste as much time as I just did finding 385 * out that it's hard-coded in i86/ml/i86.il. Similarly for 386 * curcpup. You're welcome. 387 */ 388 ASSERT(CPU == CPU->cpu_self); 389 ASSERT(curthread == CPU->cpu_thread); 390 ASSERT_STACK_ALIGNED(); 391 392 /* 393 * Setup the first lgroup, and home t0 394 */ 395 lgrp_setup(); 396 397 /* 398 * Once 'startup()' completes, the thread_reaper() daemon would be 399 * created(in thread_init()). After that, it is safe to create threads 400 * that could exit. These exited threads will get reaped. 401 */ 402 startup(); 403 segkmem_gc(); 404 callb_init(); 405 cbe_init_pre(); /* x86 must initialize gethrtimef before timer_init */ 406 timer_init(); /* timer must be initialized before cyclic starts */ 407 cbe_init(); 408 callout_init(); /* callout table MUST be init'd after cyclics */ 409 clock_tick_init_pre(); 410 clock_init(); 411 412 /* 413 * On some platforms, clkinitf() changes the timing source that 414 * gethrtime_unscaled() uses to generate timestamps. cbe_init() calls 415 * clkinitf(), so re-initialize the microstate counters after the 416 * timesource has been chosen. 417 */ 418 init_mstate(&t0, LMS_SYSTEM); 419 init_cpu_mstate(CPU, CMS_SYSTEM); 420 421 /* 422 * May need to probe to determine latencies from CPU 0 after 423 * gethrtime() comes alive in cbe_init() and before enabling interrupts 424 */ 425 lgrp_plat_probe(); 426 427 /* 428 * Call all system initialization functions. 429 */ 430 for (initptr = &init_tbl[0]; *initptr; initptr++) 431 (**initptr)(); 432 433 /* 434 * initialize vm related stuff. 435 */ 436 vm_init(); 437 438 /* 439 * initialize buffer pool for raw I/O requests 440 */ 441 physio_bufs_init(); 442 443 ttolwp(curthread)->lwp_error = 0; /* XXX kludge for SCSI driver */ 444 445 /* 446 * Drop the interrupt level and allow interrupts. At this point 447 * the DDI guarantees that interrupts are enabled. 448 */ 449 (void) spl0(); 450 interrupts_unleashed = 1; 451 452 #if defined(__i386) || defined(__amd64) 453 /* 454 * add intel iommu fault event handler 455 */ 456 rootnex_iommu_add_intr(); 457 #endif 458 459 vfs_mountroot(); /* Mount the root file system */ 460 errorq_init(); /* after vfs_mountroot() so DDI root is ready */ 461 cpu_kstat_init(CPU); /* after vfs_mountroot() so TOD is valid */ 462 ddi_walk_devs(ddi_root_node(), pm_adjust_timestamps, NULL); 463 /* after vfs_mountroot() so hrestime is valid */ 464 465 post_startup(); 466 swaploaded = 1; 467 468 /* 469 * Initialize Solaris Audit Subsystem 470 */ 471 audit_init(); 472 473 /* 474 * Plumb the protocol modules and drivers only if we are not 475 * networked booted, in this case we already did it in rootconf(). 476 */ 477 if (netboot == 0) 478 (void) strplumb(); 479 480 gethrestime(&PTOU(curproc)->u_start); 481 curthread->t_start = PTOU(curproc)->u_start.tv_sec; 482 p->p_mstart = gethrtime(); 483 484 /* 485 * Perform setup functions that can only be done after root 486 * and swap have been set up. 487 */ 488 consconfig(); 489 release_bootstrap(); 490 491 /* 492 * attach drivers with ddi-forceattach prop 493 * This must be done after consconfig() to prevent usb key/mouse 494 * from attaching before the upper console stream is plumbed. 495 * It must be done early enough to load hotplug drivers (e.g. 496 * pcmcia nexus) so that devices enumerated via hotplug is 497 * available before I/O subsystem is fully initialized. 498 */ 499 i_ddi_forceattach_drivers(); 500 501 /* 502 * Set the scan rate and other parameters of the paging subsystem. 503 */ 504 setupclock(0); 505 506 /* 507 * Create kmem cache for proc structures 508 */ 509 process_cache = kmem_cache_create("process_cache", sizeof (proc_t), 510 0, NULL, NULL, NULL, NULL, NULL, 0); 511 512 /* 513 * Initialize process 0's lwp directory and lwpid hash table. 514 */ 515 p->p_lwpdir = p->p_lwpfree = p0_lwpdir; 516 p->p_lwpdir->ld_next = p->p_lwpdir + 1; 517 p->p_lwpdir_sz = 2; 518 p->p_tidhash = p0_tidhash; 519 p->p_tidhash_sz = 2; 520 p0_lep.le_thread = curthread; 521 p0_lep.le_lwpid = curthread->t_tid; 522 p0_lep.le_start = curthread->t_start; 523 lwp_hash_in(p, &p0_lep); 524 525 /* 526 * Initialize extended accounting. 527 */ 528 exacct_init(); 529 530 /* 531 * Initialize threads of sysevent event channels 532 */ 533 sysevent_evc_thrinit(); 534 535 /* 536 * main lgroup initialization 537 * This must be done after post_startup(), but before 538 * start_other_cpus() 539 */ 540 lgrp_main_init(); 541 542 /* 543 * Perform MP initialization, if any. 544 */ 545 start_other_cpus(0); 546 547 /* 548 * Finish lgrp initialization after all CPUS are brought online. 549 */ 550 lgrp_main_mp_init(); 551 552 /* 553 * After mp_init(), number of cpus are known (this is 554 * true for the time being, when there are actually 555 * hot pluggable cpus then this scheme would not do). 556 * Any per cpu initialization is done here. 557 */ 558 kmem_mp_init(); 559 vmem_update(NULL); 560 561 clock_tick_init_post(); 562 563 for (initptr = &mp_init_tbl[0]; *initptr; initptr++) 564 (**initptr)(); 565 566 /* 567 * These must be called after start_other_cpus 568 */ 569 pm_cfb_setup_intr(); 570 #if defined(__x86) 571 cpupm_post_startup(); 572 #endif 573 574 /* 575 * Make init process; enter scheduling loop with system process. 576 */ 577 578 /* create init process */ 579 if (newproc(start_init, NULL, defaultcid, 59, NULL)) 580 panic("main: unable to fork init."); 581 582 /* create pageout daemon */ 583 if (newproc(pageout, NULL, syscid, maxclsyspri - 1, NULL)) 584 panic("main: unable to fork pageout()"); 585 586 /* create fsflush daemon */ 587 if (newproc(fsflush, NULL, syscid, minclsyspri, NULL)) 588 panic("main: unable to fork fsflush()"); 589 590 /* create cluster process if we're a member of one */ 591 if (cluster_bootflags & CLUSTER_BOOTED) { 592 if (newproc(cluster_wrapper, NULL, syscid, minclsyspri, NULL)) 593 panic("main: unable to fork cluster()"); 594 } 595 596 /* 597 * Create system threads (threads are associated with p0) 598 */ 599 600 /* create module uninstall daemon */ 601 /* BugID 1132273. If swapping over NFS need a bigger stack */ 602 (void) thread_create(NULL, 0, (void (*)())mod_uninstall_daemon, 603 NULL, 0, &p0, TS_RUN, minclsyspri); 604 605 (void) thread_create(NULL, 0, seg_pasync_thread, 606 NULL, 0, &p0, TS_RUN, minclsyspri); 607 608 pid_setmin(); 609 610 bcopy("sched", PTOU(curproc)->u_psargs, 6); 611 bcopy("sched", PTOU(curproc)->u_comm, 5); 612 sched(); 613 /* NOTREACHED */ 614 } 615