154 lines
5.1 KiB
Groff
154 lines
5.1 KiB
Groff
.\" $NetBSD: installboot.8,v 1.7 1999/12/30 22:31:20 simonb Exp $
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.\"
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.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Paul Kranenburg.
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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 NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd September 29, 1995
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.Dt INSTALLBOOT 8 sparc
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.Os
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.Sh NAME
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.Nm installboot
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.Nd install a bootstrap on an FFS filesystem partition
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.Sh SYNOPSIS
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.Nm installboot
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.Op Fl nv
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.Ar boot
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.Ar bootxx
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.Ar device
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.Sh DESCRIPTION
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.Nm installboot
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prepares a FFS filesystem partition for boot-strapping from the PROM.
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The sparc bootblocks are split into two parts: a small first-stage program that
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is written into the superblock area in a partition
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.Po
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and hence is limited in size to SBSIZE - DEV_BSIZE bytes
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.Pc ,
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and a second-stage program that resides in the filesystem proper.
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.Pp
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The first-stage program is loaded into memory by the PROM. After it receiving
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control, it loads the second stage program from a set of filesystem block
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numbers that have been hard-coded into it by the
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.Nm installboot
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program.
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.Pp
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The second-stage boot program uses the device driver interface to
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the PROM and the stand-alone filesystem code in
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.Dq libsa.a
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to locate and load the kernel.
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The second-stage boot program and the prototype code for the
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first-stage bootprogram can be found in
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.Pa /usr/mdec/boot
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and
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.Pa /usr/mdec/bootxx
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respectively. The second-stage program commonly resides in the root directory
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as
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.Pa /boot .
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The utility
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.Pa /usr/mdec/binstall
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can be used to properly copy the a second-stage bootprogram to its
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destination.
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.Pp
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Note that not all PROM versions accept the same layout of the first-stage
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boot program: Sun 4 systems with the
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.Dq old monitor
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interface require that executable instructions be present right at the
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start of the program, while
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.Tn Openboot
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machines expect a
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.Xr a.out 5
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header on the front of the boot program.
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.Nm
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takes care of this by constructing an artificial a.out header which has
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enough of the magic numbers in it to appease
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.Tn Openboot
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ROMs, while simultaneously consisting of instructions
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.Po
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in fact, just a branch past the rest of the header
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.Pc
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for Sun 4
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.Dq old monitor
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ROMs to execute.
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.Pp
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There are two options with these meaning:
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.Bl -tag -width flag
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.It Fl n
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Do not actually write anything on the disk.
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.It Fl v
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Verbose mode: prints internal informational messages on standard output.
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.El
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.Pp
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The arguments are:
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.Bl -tag -width bootxx
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.It Ar boot
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the name of the second-stage boot program in the file system
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where the first-stage boot program is to be installed.
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.It Ar bootxx
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the name of the prototype file for the first stage boot program.
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.It Ar device
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the name of the raw device in which the first-stage boot program
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is to be installed. This should correspond to the block device
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on which the file system containing
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.Ar boot
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is mounted.
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.El
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.Sh EXAMPLES
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The following command will install the first-stage bootblocks in the
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root filesystem
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.Pq assumed to be mounted on Dq sd0a
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using the file
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.Pa /boot
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as the second-level boot program:
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.Bd -literal -offset indent
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installboot /boot /usr/mdec/bootxx /dev/rsd0a
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.Ed
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.Sh BUGS
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.Nm
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requires simultaneous access to the mounted file system and
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the raw device, but that is not allowed with the kernel
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.Dv securelevel
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variable set to a value greater than zero
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.Pq the default ,
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so
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.Nm installboot
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only works in single-user mode
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.Pq or insecure mode - see Xr init 8 .
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.Sh SEE ALSO
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.Xr disklabel 8 ,
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.Xr init 8
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.Sh HISTORY
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The
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.Nm
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first appeared in
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.Nx 1.1
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