395 lines
11 KiB
C
395 lines
11 KiB
C
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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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*/
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#include <sys/param.h>
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#include <sys/filedesc.h>
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#include <sys/errno.h>
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#include <sys/exec.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/map.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/conf.h>
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#include <sys/buf.h>
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#include <sys/clist.h>
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#include <sys/device.h>
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#include <sys/protosw.h>
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#include <sys/reboot.h>
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#include <sys/user.h>
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#include <ufs/ufs/quota.h>
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#include <machine/cpu.h>
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#include <vm/vm.h>
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#ifdef HPFPLIB
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char copyright[] =
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"Copyright (c) 1982, 1986, 1989, 1991, 1993\n\tThe Regents of the University of California.\nCopyright (c) 1992 Hewlett-Packard Company\nCopyright (c) 1992 Motorola Inc.\nAll rights reserved.\n\n";
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#else
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char copyright[] =
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"Copyright (c) 1982, 1986, 1989, 1991, 1993\n\tThe Regents of the University of California. All rights reserved.\n\n";
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#endif
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/* Components of the first process -- never freed. */
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struct session session0;
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struct pgrp pgrp0;
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struct proc proc0;
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struct pcred cred0;
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struct filedesc0 filedesc0;
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struct plimit limit0;
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struct vmspace vmspace0;
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struct proc *curproc = &proc0;
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struct proc *initproc, *pageproc;
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int cmask = CMASK;
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extern struct user *proc0paddr;
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struct vnode *rootvp, *swapdev_vp;
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int boothowto;
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struct timeval boottime;
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struct timeval runtime;
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static void start_init __P((struct proc *p, void *framep));
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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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main(framep)
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void *framep;
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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 struct pdevinit *pdev;
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register int i;
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int s, rval[2];
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extern int (*mountroot) __P((void));
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extern struct pdevinit pdevinit[];
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extern void roundrobin __P((void *));
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extern void schedcpu __P((void *));
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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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p = &proc0;
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curproc = p;
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/*
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* Attempt to find console and initialize
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* in case of early panic or other messages.
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*/
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consinit();
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printf(copyright);
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vm_mem_init();
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kmeminit();
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cpu_startup();
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/*
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* Create process 0 (the swapper).
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*/
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allproc = (volatile struct proc *)p;
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p->p_prev = (struct proc **)&allproc;
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p->p_pgrp = &pgrp0;
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pgrphash[0] = &pgrp0;
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pgrp0.pg_mem = p;
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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_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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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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/* 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 = NOFILE;
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limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC;
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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_refcnt = 1;
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/* Allocate a prototype map so we have something to fork. */
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p->p_vmspace = &vmspace0;
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vmspace0.vm_refcnt = 1;
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pmap_pinit(&vmspace0.vm_pmap);
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vm_map_init(&p->p_vmspace->vm_map, round_page(VM_MIN_ADDRESS),
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trunc_page(VM_MAX_ADDRESS), TRUE);
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vmspace0.vm_map.pmap = &vmspace0.vm_pmap;
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p->p_addr = proc0paddr; /* XXX */
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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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* Initialize per uid information structure and charge
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* root for one process.
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*/
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usrinfoinit();
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(void)chgproccnt(0, 1);
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rqinit();
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/* Configure virtual memory system, set vm rlimits. */
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vm_init_limits(p);
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/* Initialize the file systems. */
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vfsinit();
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/* Start real time and statistics clocks. */
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initclocks();
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/* Initialize mbuf's. */
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mbinit();
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/* Initialize clists. */
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clist_init();
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#ifdef SYSVSHM
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/* Initialize System V style shared memory. */
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shminit();
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#endif
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/* Attach pseudo-devices. */
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for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++)
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(*pdev->pdev_attach)(pdev->pdev_count);
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/*
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* Initialize protocols. Block reception of incoming packets
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* until everything is ready.
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*/
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s = splimp();
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ifinit();
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domaininit();
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splx(s);
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#ifdef GPROF
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/* Initialize kernel profiling. */
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kmstartup();
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#endif
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/* Kick off timeout driven events by calling first time. */
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roundrobin(NULL);
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schedcpu(NULL);
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/* Mount the root file system. */
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if ((*mountroot)())
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panic("cannot mount root");
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/* Get the vnode for '/'. Set fdp->fd_fd.fd_cdir to reference it. */
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if (VFS_ROOT(mountlist.tqh_first, &rootvnode))
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panic("cannot find root vnode");
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fdp->fd_fd.fd_cdir = rootvnode;
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VREF(fdp->fd_fd.fd_cdir);
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VOP_UNLOCK(rootvnode);
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fdp->fd_fd.fd_rdir = NULL;
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swapinit();
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/*
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* Now can look at time, having had a chance to verify the time
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* from the file system. Reset p->p_rtime as it may have been
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* munched in mi_switch() after the time got set.
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*/
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p->p_stats->p_start = runtime = mono_time = boottime = time;
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p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0;
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/* Initialize signal state for process 0. */
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siginit(p);
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/* Create process 1 (init(8)). */
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if (fork(p, NULL, rval))
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panic("fork init");
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if (rval[1]) {
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start_init(curproc, framep);
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return;
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}
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/* Create process 2 (the pageout daemon). */
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if (fork(p, NULL, rval))
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panic("fork pager");
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if (rval[1]) {
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/*
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* Now in process 2.
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*/
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p = curproc;
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pageproc = p;
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p->p_flag |= P_INMEM | P_SYSTEM; /* XXX */
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bcopy("pagedaemon", curproc->p_comm, sizeof ("pagedaemon"));
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vm_pageout();
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/* NOTREACHED */
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}
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/* The scheduler is an infinite loop. */
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scheduler();
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/* NOTREACHED */
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}
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/*
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* List of paths to try when searching for "init".
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*/
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static char *initpaths[] = {
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"/sbin/init",
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"/sbin/oinit",
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"/sbin/init.bak",
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NULL,
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};
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/*
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* Start the initial user process; try exec'ing each pathname in "initpaths".
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* The program is invoked with one argument containing the boot flags.
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*/
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static void
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start_init(p, framep)
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struct proc *p;
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void *framep;
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{
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vm_offset_t addr;
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struct execve_args args;
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int options, i, retval[2], error;
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char **pathp, *path, *ucp, **uap, *arg0, *arg1;
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initproc = p;
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/*
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* We need to set the system call frame as if we were entered through
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* a syscall() so that when we call execve() below, it will be able
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* to set the entry point (see setregs) when it tries to exec. The
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* startup code in "locore.s" has allocated space for the frame and
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* passed a pointer to that space as main's argument.
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*/
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cpu_set_init_frame(p, framep);
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/*
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* Need just enough stack to hold the faked-up "execve()" arguments.
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*/
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addr = trunc_page(VM_MAX_ADDRESS - PAGE_SIZE);
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if (vm_allocate(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, FALSE) != 0)
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panic("init: couldn't allocate argument space");
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p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
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for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) {
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/*
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* Move out the boot flag argument.
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*/
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options = 0;
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ucp = (char *)USRSTACK;
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(void)subyte(--ucp, 0); /* trailing zero */
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if (boothowto & RB_SINGLE) {
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(void)subyte(--ucp, 's');
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options = 1;
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}
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#ifdef notyet
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if (boothowto & RB_FASTBOOT) {
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(void)subyte(--ucp, 'f');
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options = 1;
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}
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#endif
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if (options == 0)
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(void)subyte(--ucp, '-');
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(void)subyte(--ucp, '-'); /* leading hyphen */
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arg1 = ucp;
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/*
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* Move out the file name (also arg 0).
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*/
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for (i = strlen(path) + 1; i >= 0; i--)
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(void)subyte(--ucp, path[i]);
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arg0 = ucp;
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/*
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|
|
* Move out the arg pointers.
|
||
|
|
*/
|
||
|
|
uap = (char **)((int)ucp & ~(NBPW-1));
|
||
|
|
(void)suword((caddr_t)--uap, 0); /* terminator */
|
||
|
|
(void)suword((caddr_t)--uap, (int)arg1);
|
||
|
|
(void)suword((caddr_t)--uap, (int)arg0);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Point at the arguments.
|
||
|
|
*/
|
||
|
|
args.fname = arg0;
|
||
|
|
args.argp = uap;
|
||
|
|
args.envp = NULL;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Now try to exec the program. If can't for any reason
|
||
|
|
* other than it doesn't exist, complain.
|
||
|
|
*/
|
||
|
|
if ((error = execve(p, &args, &retval)) == 0)
|
||
|
|
return;
|
||
|
|
if (error != ENOENT)
|
||
|
|
printf("exec %s: error %d\n", path, error);
|
||
|
|
}
|
||
|
|
printf("init: not found\n");
|
||
|
|
panic("no init");
|
||
|
|
}
|