/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1988 AT&T */ /* All Rights Reserved */ #pragma ident "%Z%%M% %I% %E% SMI" /* from SVr4.0 1.31 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* well known processes */ proc_t *proc_sched; /* memory scheduler */ proc_t *proc_init; /* init */ proc_t *proc_pageout; /* pageout daemon */ proc_t *proc_fsflush; /* fsflush daemon */ pgcnt_t maxmem; /* Maximum available memory in pages. */ pgcnt_t freemem; /* Current available memory in pages. */ int audit_active; int interrupts_unleashed; /* set when we do the first spl0() */ kmem_cache_t *process_cache; /* kmem cache for proc structures */ /* * Process 0's lwp directory and lwpid hash table. */ lwpdir_t p0_lwpdir[2]; lwpdir_t *p0_tidhash[2]; lwpent_t p0_lep; /* * Machine-independent initialization code * Called from cold start routine as * soon as a stack and segmentation * have been established. * Functions: * clear and free user core * turn on clock * hand craft 0th process * call all initialization routines * fork - process 0 to schedule * - process 1 execute bootstrap * - process 2 to page out * create system threads */ int cluster_bootflags = 0; void cluster_wrapper(void) { cluster(); panic("cluster() returned"); } char initname[INITNAME_SZ] = "/sbin/init"; /* also referenced by zone0 */ char initargs[BOOTARGS_MAX] = ""; /* also referenced by zone0 */ extern int64_t lwp_sigmask(int, uint_t, uint_t); /* * Construct a stack for init containing the arguments to it, then * pass control to exec_common. */ int exec_init(const char *initpath, const char *args) { caddr32_t ucp; caddr32_t *uap; caddr32_t *argv; caddr32_t exec_fnamep; char *scratchargs; int i, sarg; size_t argvlen, alen; boolean_t in_arg; int argc = 0; int error = 0, count = 0; proc_t *p = ttoproc(curthread); klwp_t *lwp = ttolwp(curthread); int brand_action; if (args == NULL) args = ""; alen = strlen(initpath) + 1 + strlen(args) + 1; scratchargs = kmem_alloc(alen, KM_SLEEP); (void) snprintf(scratchargs, alen, "%s %s", initpath, args); /* * We do a quick two state parse of the string to sort out how big * argc should be. */ in_arg = B_FALSE; for (i = 0; i < strlen(scratchargs); i++) { if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { if (in_arg) { in_arg = B_FALSE; argc++; } } else { in_arg = B_TRUE; } } argvlen = sizeof (caddr32_t) * (argc + 1); argv = kmem_zalloc(argvlen, KM_SLEEP); /* * We pull off a bit of a hack here. We work our way through the * args string, putting nulls at the ends of space delimited tokens * (boot args don't support quoting at this time). Then we just * copy the whole mess to userland in one go. In other words, we * transform this: "init -s -r\0" into this on the stack: * * -0x00 \0 * -0x01 r * -0x02 - <--------. * -0x03 \0 | * -0x04 s | * -0x05 - <------. | * -0x06 \0 | | * -0x07 t | | * -0x08 i | | * -0x09 n | | * -0x0a i <---. | | * -0x10 NULL | | | (argv[3]) * -0x14 -----|--|-' (argv[2]) * -0x18 ------|--' (argv[1]) * -0x1c -------' (argv[0]) * * Since we know the value of ucp at the beginning of this process, * we can trivially compute the argv[] array which we also need to * place in userland: argv[i] = ucp - sarg(i), where ucp is the * stack ptr, and sarg is the string index of the start of the * argument. */ ucp = (caddr32_t)(uintptr_t)p->p_usrstack; argc = 0; in_arg = B_FALSE; sarg = 0; for (i = 0; i < alen; i++) { if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { if (in_arg == B_TRUE) { in_arg = B_FALSE; scratchargs[i] = '\0'; argv[argc++] = ucp - (alen - sarg); } } else if (in_arg == B_FALSE) { in_arg = B_TRUE; sarg = i; } } ucp -= alen; error |= copyout(scratchargs, (caddr_t)(uintptr_t)ucp, alen); uap = (caddr32_t *)P2ALIGN((uintptr_t)ucp, sizeof (caddr32_t)); uap--; /* advance to be below the word we're in */ uap -= (argc + 1); /* advance argc words down, plus one for NULL */ error |= copyout(argv, uap, argvlen); if (error != 0) { zcmn_err(p->p_zone->zone_id, CE_WARN, "Could not construct stack for init.\n"); kmem_free(argv, argvlen); kmem_free(scratchargs, alen); return (EFAULT); } exec_fnamep = argv[0]; kmem_free(argv, argvlen); kmem_free(scratchargs, alen); /* * Point at the arguments. */ lwp->lwp_ap = lwp->lwp_arg; lwp->lwp_arg[0] = (uintptr_t)exec_fnamep; lwp->lwp_arg[1] = (uintptr_t)uap; lwp->lwp_arg[2] = NULL; curthread->t_post_sys = 1; curthread->t_sysnum = SYS_execve; /* * If we are executing init from zsched, we may have inherited its * parent process's signal mask. Clear it now so that we behave in * the same way as when started from the global zone. */ (void) lwp_sigmask(SIG_UNBLOCK, 0xffffffff, 0xffffffff); brand_action = ZONE_IS_BRANDED(p->p_zone) ? EBA_BRAND : EBA_NONE; again: error = exec_common((const char *)(uintptr_t)exec_fnamep, (const char **)(uintptr_t)uap, NULL, brand_action); /* * Normally we would just set lwp_argsaved and t_post_sys and * let post_syscall reset lwp_ap for us. Unfortunately, * exec_init isn't always called from a system call. Instead * of making a mess of trap_cleanup, we just reset the args * pointer here. */ reset_syscall_args(); switch (error) { case 0: return (0); case ENOENT: zcmn_err(p->p_zone->zone_id, CE_WARN, "exec(%s) failed (file not found).\n", initpath); return (ENOENT); case EAGAIN: case EINTR: ++count; if (count < 5) { zcmn_err(p->p_zone->zone_id, CE_WARN, "exec(%s) failed with errno %d. Retrying...\n", initpath, error); goto again; } } zcmn_err(p->p_zone->zone_id, CE_WARN, "exec(%s) failed with errno %d.", initpath, error); return (error); } /* * This routine does all of the common setup for invoking init; global * and non-global zones employ this routine for the functionality which is * in common. * * This program (init, presumably) must be a 32-bit process. */ int start_init_common() { proc_t *p = curproc; ASSERT_STACK_ALIGNED(); p->p_zone->zone_proc_initpid = p->p_pid; p->p_cstime = p->p_stime = p->p_cutime = p->p_utime = 0; p->p_usrstack = (caddr_t)USRSTACK32; p->p_model = DATAMODEL_ILP32; p->p_stkprot = PROT_ZFOD & ~PROT_EXEC; p->p_datprot = PROT_ZFOD & ~PROT_EXEC; p->p_stk_ctl = INT32_MAX; p->p_as = as_alloc(); p->p_as->a_proc = p; p->p_as->a_userlimit = (caddr_t)USERLIMIT32; (void) hat_setup(p->p_as->a_hat, HAT_INIT); init_core(); init_mstate(curthread, LMS_SYSTEM); return (exec_init(p->p_zone->zone_initname, p->p_zone->zone_bootargs)); } /* * Start the initial user process for the global zone; once running, if * init should subsequently fail, it will be automatically be caught in the * exit(2) path, and restarted by restart_init(). */ static void start_init(void) { proc_init = curproc; ASSERT(curproc->p_zone->zone_initname != NULL); if (start_init_common() != 0) halt("unix: Could not start init"); lwp_rtt(); } void main(void) { proc_t *p = ttoproc(curthread); /* &p0 */ int (**initptr)(); extern void sched(); extern void fsflush(); extern int (*init_tbl[])(); extern int (*mp_init_tbl[])(); extern id_t syscid, defaultcid; extern int swaploaded; extern int netboot; extern void vm_init(void); extern void cbe_init(void); extern void clock_init(void); extern void physio_bufs_init(void); extern void pm_cfb_setup_intr(void); extern int pm_adjust_timestamps(dev_info_t *, void *); extern void start_other_cpus(int); extern void sysevent_evc_thrinit(); extern void lgrp_main_init(void); extern void lgrp_main_mp_init(void); #if defined(__x86) extern void cpupm_post_startup(void); #endif /* * In the horrible world of x86 in-lines, you can't get symbolic * structure offsets a la genassym. This assertion is here so * that the next poor slob who innocently changes the offset of * cpu_thread doesn't waste as much time as I just did finding * out that it's hard-coded in i86/ml/i86.il. Similarly for * curcpup. You're welcome. */ ASSERT(CPU == CPU->cpu_self); ASSERT(curthread == CPU->cpu_thread); ASSERT_STACK_ALIGNED(); /* * Setup the first lgroup, and home t0 */ lgrp_setup(); /* * Once 'startup()' completes, the thread_reaper() daemon would be * created(in thread_init()). After that, it is safe to create threads * that could exit. These exited threads will get reaped. */ startup(); segkmem_gc(); callb_init(); callout_init(); /* callout table MUST be init'd before clock starts */ timer_init(); /* timer must be initialized before cyclic starts */ cbe_init(); clock_init(); /* * On some platforms, clkinitf() changes the timing source that * gethrtime_unscaled() uses to generate timestamps. cbe_init() calls * clkinitf(), so re-initialize the microstate counters after the * timesource has been chosen. */ init_mstate(&t0, LMS_SYSTEM); init_cpu_mstate(CPU, CMS_SYSTEM); /* * May need to probe to determine latencies from CPU 0 after * gethrtime() comes alive in cbe_init() and before enabling interrupts */ lgrp_plat_probe(); /* * Call all system initialization functions. */ for (initptr = &init_tbl[0]; *initptr; initptr++) (**initptr)(); /* * initialize vm related stuff. */ vm_init(); /* * initialize buffer pool for raw I/O requests */ physio_bufs_init(); ttolwp(curthread)->lwp_error = 0; /* XXX kludge for SCSI driver */ /* * Drop the interrupt level and allow interrupts. At this point * the DDI guarantees that interrupts are enabled. */ (void) spl0(); interrupts_unleashed = 1; vfs_mountroot(); /* Mount the root file system */ errorq_init(); /* after vfs_mountroot() so DDI root is ready */ cpu_kstat_init(CPU); /* after vfs_mountroot() so TOD is valid */ ddi_walk_devs(ddi_root_node(), pm_adjust_timestamps, NULL); /* after vfs_mountroot() so hrestime is valid */ post_startup(); swaploaded = 1; /* * Initial C2 audit system */ #ifdef C2_AUDIT audit_init(); /* C2 hook */ #endif /* * Plumb the protocol modules and drivers only if we are not * networked booted, in this case we already did it in rootconf(). */ if (netboot == 0) (void) strplumb(); gethrestime(&PTOU(curproc)->u_start); curthread->t_start = PTOU(curproc)->u_start.tv_sec; p->p_mstart = gethrtime(); /* * Perform setup functions that can only be done after root * and swap have been set up. */ consconfig(); #if defined(__i386) || defined(__amd64) release_bootstrap(); #endif /* * attach drivers with ddi-forceattach prop * This must be done after consconfig() to prevent usb key/mouse * from attaching before the upper console stream is plumbed. * It must be done early enough to load hotplug drivers (e.g. * pcmcia nexus) so that devices enumerated via hotplug is * available before I/O subsystem is fully initialized. */ i_ddi_forceattach_drivers(); /* * Set the scan rate and other parameters of the paging subsystem. */ setupclock(0); /* * Create kmem cache for proc structures */ process_cache = kmem_cache_create("process_cache", sizeof (proc_t), 0, NULL, NULL, NULL, NULL, NULL, 0); /* * Initialize process 0's lwp directory and lwpid hash table. */ p->p_lwpdir = p->p_lwpfree = p0_lwpdir; p->p_lwpdir->ld_next = p->p_lwpdir + 1; p->p_lwpdir_sz = 2; p->p_tidhash = p0_tidhash; p->p_tidhash_sz = 2; p0_lep.le_thread = curthread; p0_lep.le_lwpid = curthread->t_tid; p0_lep.le_start = curthread->t_start; lwp_hash_in(p, &p0_lep); /* * Initialize extended accounting. */ exacct_init(); /* * Initialize threads of sysevent event channels */ sysevent_evc_thrinit(); /* * main lgroup initialization * This must be done after post_startup(), but before * start_other_cpus() */ lgrp_main_init(); /* * Perform MP initialization, if any. */ start_other_cpus(0); /* * Finish lgrp initialization after all CPUS are brought online. */ lgrp_main_mp_init(); /* * After mp_init(), number of cpus are known (this is * true for the time being, when there are actually * hot pluggable cpus then this scheme would not do). * Any per cpu initialization is done here. */ kmem_mp_init(); vmem_update(NULL); for (initptr = &mp_init_tbl[0]; *initptr; initptr++) (**initptr)(); /* * These must be called after start_other_cpus */ pm_cfb_setup_intr(); #if defined(__x86) cpupm_post_startup(); #endif /* * Make init process; enter scheduling loop with system process. */ /* create init process */ if (newproc(start_init, NULL, defaultcid, 59, NULL)) panic("main: unable to fork init."); /* create pageout daemon */ if (newproc(pageout, NULL, syscid, maxclsyspri - 1, NULL)) panic("main: unable to fork pageout()"); /* create fsflush daemon */ if (newproc(fsflush, NULL, syscid, minclsyspri, NULL)) panic("main: unable to fork fsflush()"); /* create cluster process if we're a member of one */ if (cluster_bootflags & CLUSTER_BOOTED) { if (newproc(cluster_wrapper, NULL, syscid, minclsyspri, NULL)) panic("main: unable to fork cluster()"); } /* * Create system threads (threads are associated with p0) */ /* create module uninstall daemon */ /* BugID 1132273. If swapping over NFS need a bigger stack */ (void) thread_create(NULL, 0, (void (*)())mod_uninstall_daemon, NULL, 0, &p0, TS_RUN, minclsyspri); (void) thread_create(NULL, 0, seg_pasync_thread, NULL, 0, &p0, TS_RUN, minclsyspri); pid_setmin(); bcopy("sched", PTOU(curproc)->u_psargs, 6); bcopy("sched", PTOU(curproc)->u_comm, 5); sched(); /* NOTREACHED */ }