697 lines
18 KiB
C
697 lines
18 KiB
C
/*
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* Copyright (c) 1995 Terrence R. Lambert
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* All rights reserved.
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*
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* Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)init_main.c 8.9 (Berkeley) 1/21/94
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* $Id: init_main.c,v 1.120 1999/05/09 19:01:44 peter Exp $
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*/
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#include "opt_devfs.h"
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#include "opt_init_path.h"
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/resourcevar.h>
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#include <sys/signalvar.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/sysent.h>
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#include <sys/reboot.h>
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#include <sys/sysproto.h>
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#include <sys/vmmeter.h>
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#include <sys/unistd.h>
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#include <sys/malloc.h>
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#include <machine/cpu.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/vm_prot.h>
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#include <sys/lock.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <sys/user.h>
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#include <sys/copyright.h>
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extern struct linker_set sysinit_set; /* XXX */
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extern void mi_startup __P((void *framep));
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/* Components of the first process -- never freed. */
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static struct session session0;
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static struct pgrp pgrp0;
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struct proc proc0;
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static struct pcred cred0;
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static struct procsig procsig0;
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static struct filedesc0 filedesc0;
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static struct plimit limit0;
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static struct vmspace vmspace0;
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struct proc *initproc;
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int cmask = CMASK;
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extern struct user *proc0paddr;
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struct vnode *rootvp;
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int boothowto = 0; /* initialized so that it can be patched */
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struct timeval boottime;
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SYSCTL_STRUCT(_kern, KERN_BOOTTIME, boottime, CTLFLAG_RD,
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&boottime, timeval, "System boottime");
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/*
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* Promiscuous argument pass for start_init()
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*
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* This is a kludge because we use a return from mi_startup() rather than a call
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* to a new routine in locore.s to kick the kernel alive from locore.s.
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*/
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static void *init_framep;
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/*
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* This ensures that there is at least one entry so that the sysinit_set
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* symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
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* executed.
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*/
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SYSINIT(placeholder, SI_SUB_DUMMY,SI_ORDER_ANY, NULL, NULL)
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/*
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* The sysinit table itself. Items are checked off as the are run.
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* If we want to register new sysinit types, add them to newsysinit.
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*/
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struct sysinit **sysinit = (struct sysinit **)sysinit_set.ls_items;
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struct sysinit **newsysinit;
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/*
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* Merge a new sysinit set into the current set, reallocating it if
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* necessary. This can only be called after malloc is running.
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*/
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void
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sysinit_add(set)
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struct sysinit **set;
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{
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struct sysinit **newset;
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struct sysinit **sipp;
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struct sysinit **xipp;
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int count = 0;
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if (newsysinit)
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for (sipp = newsysinit; *sipp; sipp++)
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count++;
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else
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for (sipp = sysinit; *sipp; sipp++)
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count++;
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for (sipp = set; *sipp; sipp++)
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count++;
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count++; /* Trailing NULL */
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newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
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if (newset == NULL)
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panic("cannot malloc for sysinit");
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xipp = newset;
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if (newsysinit)
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for (sipp = newsysinit; *sipp; sipp++)
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*xipp++ = *sipp;
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else
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for (sipp = sysinit; *sipp; sipp++)
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*xipp++ = *sipp;
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for (sipp = set; *sipp; sipp++)
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*xipp++ = *sipp;
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*xipp = NULL;
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if (newsysinit)
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free(newsysinit, M_TEMP);
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newsysinit = newset;
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}
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/*
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* System startup; initialize the world, create process 0, mount root
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* filesystem, and fork to create init and pagedaemon. Most of the
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* hard work is done in the lower-level initialization routines including
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* startup(), which does memory initialization and autoconfiguration.
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*
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* This allows simple addition of new kernel subsystems that require
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* boot time initialization. It also allows substitution of subsystem
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* (for instance, a scheduler, kernel profiler, or VM system) by object
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* module. Finally, it allows for optional "kernel threads".
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*/
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void
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mi_startup(framep)
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void *framep;
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{
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register struct sysinit **sipp; /* system initialization*/
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register struct sysinit **xipp; /* interior loop of sort*/
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register struct sysinit *save; /* bubble*/
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/*
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* Copy the locore.s frame pointer for proc0, this is forked into
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* all other processes.
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*/
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init_framep = framep;
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restart:
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/*
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* Perform a bubble sort of the system initialization objects by
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* their subsystem (primary key) and order (secondary key).
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*/
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for (sipp = sysinit; *sipp; sipp++) {
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for (xipp = sipp + 1; *xipp; xipp++) {
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if ((*sipp)->subsystem < (*xipp)->subsystem ||
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((*sipp)->subsystem == (*xipp)->subsystem &&
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(*sipp)->order < (*xipp)->order))
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continue; /* skip*/
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save = *sipp;
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*sipp = *xipp;
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*xipp = save;
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}
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}
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/*
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* Traverse the (now) ordered list of system initialization tasks.
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* Perform each task, and continue on to the next task.
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*
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* The last item on the list is expected to be the scheduler,
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* which will not return.
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*/
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for (sipp = sysinit; *sipp; sipp++) {
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if ((*sipp)->subsystem == SI_SUB_DUMMY)
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continue; /* skip dummy task(s)*/
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if ((*sipp)->subsystem == SI_SUB_DONE)
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continue;
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switch( (*sipp)->type) {
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case SI_TYPE_DEFAULT:
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/* no special processing*/
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(*((*sipp)->func))((*sipp)->udata);
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break;
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case SI_TYPE_KTHREAD:
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/* kernel thread*/
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if (fork1(&proc0, RFMEM|RFFDG|RFPROC))
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panic("fork kernel thread");
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cpu_set_fork_handler(pfind(proc0.p_retval[0]),
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(*sipp)->func, (*sipp)->udata);
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break;
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case SI_TYPE_KPROCESS:
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if (fork1(&proc0, RFFDG|RFPROC))
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panic("fork kernel process");
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cpu_set_fork_handler(pfind(proc0.p_retval[0]),
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(*sipp)->func, (*sipp)->udata);
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break;
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default:
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panic("init_main: unrecognized init type");
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}
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/* Check off the one we're just done */
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(*sipp)->subsystem = SI_SUB_DONE;
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/* Check if we've installed more sysinit items via KLD */
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if (newsysinit != NULL) {
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if (sysinit != (struct sysinit **)sysinit_set.ls_items)
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free(sysinit, M_TEMP);
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sysinit = newsysinit;
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newsysinit = NULL;
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goto restart;
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}
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}
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panic("Shouldn't get here!");
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/* NOTREACHED*/
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}
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/*
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* Start a kernel process. This is called after a fork() call in
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* mi_startup() in the file kern/init_main.c.
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*
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* This function is used to start "internal" daemons.
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*/
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/* ARGSUSED*/
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void
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kproc_start(udata)
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const void *udata;
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{
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const struct kproc_desc *kp = udata;
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struct proc *p = curproc;
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#ifdef DIAGNOSTIC
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printf("Start pid=%d <%s>\n",p->p_pid, kp->arg0);
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#endif
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/* save a global descriptor, if desired*/
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if( kp->global_procpp != NULL)
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*kp->global_procpp = p;
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/* this is a non-swapped system process*/
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p->p_flag |= P_INMEM | P_SYSTEM;
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/* set up arg0 for 'ps', et al*/
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strcpy( p->p_comm, kp->arg0);
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/* call the processes' main()...*/
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(*kp->func)();
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/* NOTREACHED */
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panic("kproc_start: %s", kp->arg0);
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}
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/*
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***************************************************************************
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****
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**** The following SYSINIT's belong elsewhere, but have not yet
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**** been moved.
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****
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***************************************************************************
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*/
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#ifdef OMIT
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/*
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* Handled by vfs_mountroot (bad idea) at this time... should be
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* done the same as 4.4Lite2.
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*/
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SYSINIT(swapinit, SI_SUB_SWAP, SI_ORDER_FIRST, swapinit, NULL)
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#endif /* OMIT*/
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static void print_caddr_t __P((void *data));
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static void
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print_caddr_t(data)
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void *data;
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{
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printf("%s", (char *)data);
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}
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SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
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/*
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***************************************************************************
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****
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**** The two following SYSINT's are proc0 specific glue code. I am not
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**** convinced that they can not be safely combined, but their order of
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**** operation has been maintained as the same as the original init_main.c
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**** for right now.
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****
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**** These probably belong in init_proc.c or kern_proc.c, since they
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**** deal with proc0 (the fork template process).
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****
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***************************************************************************
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*/
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/* ARGSUSED*/
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static void proc0_init __P((void *dummy));
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static void
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proc0_init(dummy)
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void *dummy;
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{
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register struct proc *p;
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register struct filedesc0 *fdp;
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register unsigned i;
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p = &proc0;
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/*
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* Initialize process and pgrp structures.
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*/
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procinit();
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/*
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* Initialize sleep queue hash table
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*/
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sleepinit();
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/*
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* additional VM structures
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*/
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vm_init2();
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/*
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* Create process 0 (the swapper).
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*/
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LIST_INSERT_HEAD(&allproc, p, p_list);
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p->p_pgrp = &pgrp0;
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LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
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LIST_INIT(&pgrp0.pg_members);
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LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
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pgrp0.pg_session = &session0;
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session0.s_count = 1;
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session0.s_leader = p;
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p->p_sysent = &aout_sysvec;
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p->p_flag = P_INMEM | P_SYSTEM;
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p->p_stat = SRUN;
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p->p_nice = NZERO;
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p->p_rtprio.type = RTP_PRIO_NORMAL;
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p->p_rtprio.prio = 0;
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/*
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* Link for kernel based threads
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*/
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p->p_peers = 0;
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p->p_leader = p;
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bcopy("swapper", p->p_comm, sizeof ("swapper"));
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/* Create credentials. */
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cred0.p_refcnt = 1;
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p->p_cred = &cred0;
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p->p_ucred = crget();
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p->p_ucred->cr_ngroups = 1; /* group 0 */
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/* Don't jail it */
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p->p_prison = 0;
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/* Create procsig. */
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p->p_procsig = &procsig0;
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p->p_procsig->ps_refcnt = 1;
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/* Create the file descriptor table. */
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fdp = &filedesc0;
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p->p_fd = &fdp->fd_fd;
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fdp->fd_fd.fd_refcnt = 1;
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fdp->fd_fd.fd_cmask = cmask;
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fdp->fd_fd.fd_ofiles = fdp->fd_dfiles;
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fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags;
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fdp->fd_fd.fd_nfiles = NDFILE;
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/* Create the limits structures. */
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p->p_limit = &limit0;
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for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++)
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limit0.pl_rlimit[i].rlim_cur =
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limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
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limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur =
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limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
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limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur =
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limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
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i = ptoa(cnt.v_free_count);
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limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
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limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
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limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
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limit0.p_cpulimit = RLIM_INFINITY;
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limit0.p_refcnt = 1;
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/* Allocate a prototype map so we have something to fork. */
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pmap_pinit0(vmspace_pmap(&vmspace0));
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p->p_vmspace = &vmspace0;
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vmspace0.vm_refcnt = 1;
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vm_map_init(&vmspace0.vm_map, round_page(VM_MIN_ADDRESS),
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trunc_page(VM_MAXUSER_ADDRESS));
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vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
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p->p_addr = proc0paddr; /* XXX */
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#ifdef cpu_set_init_frame
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/*
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* proc0 needs to have a coherent frame base in its stack.
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*/
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cpu_set_init_frame(p, init_framep); /* XXX! */
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#endif
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/*
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* We continue to place resource usage info and signal
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* actions in the user struct so they're pageable.
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*/
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p->p_stats = &p->p_addr->u_stats;
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p->p_sigacts = &p->p_addr->u_sigacts;
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/*
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* Charge root for one process.
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*/
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(void)chgproccnt(0, 1);
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/*
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* Initialize the current process pointer (curproc) before
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* any possible traps/probes to simplify trap processing.
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*/
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SET_CURPROC(p);
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}
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SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
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/* ARGSUSED*/
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static void proc0_post __P((void *dummy));
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static void
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proc0_post(dummy)
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void *dummy;
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{
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struct timespec ts;
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/*
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* Now we can look at the time, having had a chance to verify the
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* time from the file system. Pretend that proc0 started now.
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*/
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microtime(&proc0.p_stats->p_start);
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proc0.p_runtime = 0;
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microuptime(&switchtime);
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switchticks = ticks;
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/*
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* Give the ``random'' number generator a thump.
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* XXX: Does read_random() contain enough bits to be used here ?
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*/
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nanotime(&ts);
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srandom(ts.tv_sec ^ ts.tv_nsec);
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/* Initialize signal state for process 0. */
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siginit(&proc0);
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}
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SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
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/*
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***************************************************************************
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****
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**** The following SYSINIT's and glue code should be moved to the
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**** respective files on a per subsystem basis.
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****
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***************************************************************************
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*/
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/* ARGSUSED */
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static void root_conf __P((void *dummy));
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static void
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root_conf(dummy)
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void *dummy;
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{
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cpu_rootconf();
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}
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SYSINIT(root_conf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, root_conf, NULL)
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|
|
/* ARGSUSED*/
|
|
static void xxx_vfs_root_fdtab __P((void *dummy));
|
|
static void
|
|
xxx_vfs_root_fdtab(dummy)
|
|
void *dummy;
|
|
{
|
|
register struct filedesc0 *fdp = &filedesc0;
|
|
|
|
/* Get the vnode for '/'. Set fdp->fd_fd.fd_cdir to reference it. */
|
|
if (VFS_ROOT(mountlist.cqh_first, &rootvnode))
|
|
panic("cannot find root vnode");
|
|
fdp->fd_fd.fd_cdir = rootvnode;
|
|
VREF(fdp->fd_fd.fd_cdir);
|
|
VOP_UNLOCK(rootvnode, 0, &proc0);
|
|
fdp->fd_fd.fd_rdir = rootvnode;
|
|
}
|
|
SYSINIT(retrofit, SI_SUB_ROOT_FDTAB, SI_ORDER_FIRST, xxx_vfs_root_fdtab, NULL)
|
|
|
|
|
|
/*
|
|
***************************************************************************
|
|
****
|
|
**** The following code probably belongs in another file, like
|
|
**** kern/init_init.c. It is here for two reasons only:
|
|
****
|
|
**** 1) This code returns to startup the system; this is
|
|
**** abnormal for a kernel thread.
|
|
**** 2) This code promiscuously uses init_frame
|
|
****
|
|
***************************************************************************
|
|
*/
|
|
|
|
static void kthread_init __P((const void *dummy));
|
|
SYSINIT_KP(init,SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kthread_init, NULL)
|
|
|
|
|
|
extern void prepare_usermode __P((void));
|
|
static void start_init __P((struct proc *p));
|
|
|
|
/* ARGSUSED*/
|
|
static void
|
|
kthread_init(dummy)
|
|
const void *dummy;
|
|
{
|
|
/* Create process 1 (init(8)). */
|
|
start_init(curproc);
|
|
|
|
prepare_usermode();
|
|
|
|
/*
|
|
* This returns to the fork trampoline, then to user mode.
|
|
*/
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* List of paths to try when searching for "init".
|
|
*/
|
|
static char init_path[MAXPATHLEN] =
|
|
#ifdef INIT_PATH
|
|
__XSTRING(INIT_PATH);
|
|
#else
|
|
"/sbin/init;/sbin/oinit;/sbin/init.bak;/stand/sysinstall";
|
|
#endif
|
|
SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
|
|
|
|
/*
|
|
* Start the initial user process; try exec'ing each pathname in init_path.
|
|
* The program is invoked with one argument containing the boot flags.
|
|
*/
|
|
static void
|
|
start_init(p)
|
|
struct proc *p;
|
|
{
|
|
vm_offset_t addr;
|
|
struct execve_args args;
|
|
int options, error;
|
|
char *var, *path, *next, *s;
|
|
char *ucp, **uap, *arg0, *arg1;
|
|
|
|
initproc = p;
|
|
|
|
/*
|
|
* Need just enough stack to hold the faked-up "execve()" arguments.
|
|
*/
|
|
addr = trunc_page(USRSTACK - PAGE_SIZE);
|
|
if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
|
|
FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
|
|
panic("init: couldn't allocate argument space");
|
|
p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
|
|
p->p_vmspace->vm_ssize = 1;
|
|
|
|
if ((var = getenv("init_path")) != NULL) {
|
|
strncpy(init_path, var, sizeof init_path);
|
|
init_path[sizeof init_path - 1] = 0;
|
|
}
|
|
|
|
for (path = init_path; *path != '\0'; path = next) {
|
|
while (*path == ';')
|
|
path++;
|
|
if (*path == '\0')
|
|
break;
|
|
for (next = path; *next != '\0' && *next != ';'; next++)
|
|
/* nothing */ ;
|
|
if (bootverbose)
|
|
printf("start_init: trying %.*s\n", (int)(next - path),
|
|
path);
|
|
|
|
/*
|
|
* Move out the boot flag argument.
|
|
*/
|
|
options = 0;
|
|
ucp = (char *)USRSTACK;
|
|
(void)subyte(--ucp, 0); /* trailing zero */
|
|
if (boothowto & RB_SINGLE) {
|
|
(void)subyte(--ucp, 's');
|
|
options = 1;
|
|
}
|
|
#ifdef notyet
|
|
if (boothowto & RB_FASTBOOT) {
|
|
(void)subyte(--ucp, 'f');
|
|
options = 1;
|
|
}
|
|
#endif
|
|
|
|
#ifdef BOOTCDROM
|
|
(void)subyte(--ucp, 'C');
|
|
options = 1;
|
|
#endif
|
|
if (options == 0)
|
|
(void)subyte(--ucp, '-');
|
|
(void)subyte(--ucp, '-'); /* leading hyphen */
|
|
arg1 = ucp;
|
|
|
|
/*
|
|
* Move out the file name (also arg 0).
|
|
*/
|
|
(void)subyte(--ucp, 0);
|
|
for (s = next - 1; s >= path; s--)
|
|
(void)subyte(--ucp, *s);
|
|
arg0 = ucp;
|
|
|
|
/*
|
|
* Move out the arg pointers.
|
|
*/
|
|
uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
|
|
(void)suword((caddr_t)--uap, (long)0); /* terminator */
|
|
(void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
|
|
(void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
|
|
|
|
/*
|
|
* Point at the arguments.
|
|
*/
|
|
args.fname = arg0;
|
|
args.argv = uap;
|
|
args.envv = NULL;
|
|
|
|
/*
|
|
* Now try to exec the program. If can't for any reason
|
|
* other than it doesn't exist, complain.
|
|
*
|
|
* Otherwise return to mi_startup() which returns to btext
|
|
* which completes the system startup.
|
|
*/
|
|
if ((error = execve(p, &args)) == 0)
|
|
return;
|
|
if (error != ENOENT)
|
|
printf("exec %.*s: error %d\n", (int)(next - path),
|
|
path, error);
|
|
}
|
|
printf("init: not found\n");
|
|
panic("no init");
|
|
}
|