mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-02 04:13:39 +00:00
e9b13dd6ec
sector 0 of a disk and boot0.5 is the `boot selector' which starts from address 0x400. The IPL loads boot0.5 and boot0.5 loads bootblock of a slice. The boot manager stuff was developed by me (kato) with Borland C++, and then, translated into bcc in the ports collection by Nokubi-san. After that, boot0 has been translated into gas with the .code16 directive by Takahashi-san (nyan) and boot0.5 has been rewritten in gas by me.
59 lines
1.7 KiB
ArmAsm
59 lines
1.7 KiB
ArmAsm
# Copyright (c) KATO Takenori, 1999, 2000.
|
|
#
|
|
# All rights reserved. Unpublished rights reserved under the copyright
|
|
# laws of Japan.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
#
|
|
# 1. Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer as
|
|
# the first lines of this file unmodified.
|
|
# 2. Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in the
|
|
# documentation and/or other materials provided with the distribution.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
#
|
|
# $FreeBSD$
|
|
#
|
|
.global start
|
|
.code16
|
|
|
|
.text
|
|
start:
|
|
cli
|
|
movw %cs, %ax
|
|
movw %ax, %ds
|
|
movw %ss, iniss
|
|
movw %sp, inisp
|
|
movw %ax, %ss
|
|
movw $0xfffe, %sp
|
|
sti
|
|
xorw %ax, %ax
|
|
movw %ax, %es
|
|
call main
|
|
|
|
cli
|
|
movw %cs:iniss, %ss
|
|
movw %cs:inisp, %sp
|
|
sti
|
|
int $0x1e
|
|
# NOTREACHED
|
|
lret
|
|
|
|
.data
|
|
.global iniss, inisp
|
|
iniss: .word 0
|
|
inisp: .word 0
|