linux0.12--15.构建用grub引导linux-0.12内核的硬盘镜像

1. 构建用grub引导linux-0.12内核的硬盘镜像 先上图
a. 下图是grub引导linux-0.12的图


b.对比一下Linux-0.12软盘引导的打印

发现grub引导Image格式时不会执行boot/bootsect.s,但会执行boot/setup.s

cong@msi:/work/os/linux-0.12/boot$ gp "SVGA"
setup.s:msg1:        db    "Press  to see SVGA-modes available or any other key to continue."

2.下面是构建硬盘镜像的脚本

cong@msi:/work/os/rootfs/grub/grub0.97$ cat createminix.sh
#!/bin/sh
TOPDIR=`pwd`
install_grub()
{
    ./grub_sh --device-map=/dev/null <<EOF
    device (hd0) hdminix.img
    geometry (hd0) 65 16 63
    root (hd0,0)
    setup (hd0)
    quit
EOF
}
create_fs()
{
    echo "cong: next create fs"
    #create filesystem
    cd /tmp/minix

    #先创建系统目录
    sudo mkdir -pv etc dev bin usr lib var  boot
    sudo mknod ./dev/tty1 c 4 1
    sudo mknod ./dev/console c 5 1
    sudo cp $TOPDIR/bash ./bin/sh
    #sudo ln -s busybox ./bin/sh
    #sudo cp $TOPDIR/libc.so.6 ./lib/
    #sudo cp $TOPDIR/ld-linux.so.2 ./lib/
    sudo cp -arf $TOPDIR/grub ./boot/
    sudo cp -arf $TOPDIR/bzImage ./boot/
    sudo cp -arf $TOPDIR/Image ./boot/
    #sudo cp $TOPDIR/vmlinux ./boot/
    cd -
}
mount_fs()
{
    echo "cong: next losetup /dev/loop2"
    sudo losetup /dev/loop2 ./hdminix.img
    #512*2048=1048576
    echo "cong: next losetup /dev/loop3"
    sudo losetup -o 1048576 /dev/loop3 /dev/loop2
    echo "cong: next show losetup all"
    sudo losetup -a

    echo "cong: next mount "
    mkdir /tmp/minix
    sudo mount -t minix /dev/loop3 /tmp/minix/
}
#fdisk hdminix.img to minix 80
make_fs()
{
    #32M=32×1024×14/512=65536
    dd if=/dev/zero of=./hdminix.img bs=1M count=32
    fdisk ./hdminix.img <<EOF
    n
    p
    1
    2048
    65535
    t
    80
    w
EOF
    sleep 1
    fdisk -l ./hdminix.img

    echo "cong: next losetup /dev/loop2"
    sudo losetup /dev/loop2 ./hdminix.img
    #512*2048=1048576
    echo "cong: next losetup /dev/loop3"
    sudo losetup -o 1048576 /dev/loop3 /dev/loop2
    echo "cong: next show losetup all"
    sudo losetup -a

    echo "cong: next mkfs  minix /dev/loop3"
    sudo ./mkfs /dev/loop3 65535

    echo "cong: next mount "
    mkdir /tmp/minix
    sudo mount -t minix /dev/loop3 /tmp/minix/
    create_fs
    install_grub
}
umount_fs()
{
    sudo umount /tmp/minix
    sudo losetup -d /dev/loop3
    sudo losetup -d /dev/loop2
    sudo losetup -a
}

clean_fs()
{
    echo "cong: next umount /tmp/minix"
    sudo umount /tmp/minix
    echo "cong: next rm -rf /tmp/minix"
    sudo rm -rf /tmp/minix
    echo "cong: next losetup -d"
    sudo losetup -d /dev/loop3
    sudo losetup -d /dev/loop2
    echo "cong: next show losetup"
    sudo losetup -a
    echo "cong: next rm -rf ./hdminix.img"
    rm -rf ./hdminix.img
}

mytest()
{
    echo "TOPDIR=$TOPDIR"
}
case "$1" in
    fs)
        make_fs
        ;;
    clean)
        clean_fs
        ;;
    mount)
        mount_fs
        ;;
    umount)
        umount_fs
        ;;
    test)
        mytest
        ;;
    *)
        make_fs
        ;;
esac

3.脚本及用到的工具打包
grub0.rar(下载后改名为grub0.97_ext2_minix.tar.gz)
4.使用说明

1.目录说明
cong@msi:/work/os/rootfs/grub/grub0.97$ tree
.
├── bash -->a.out格式
├── bochrc -->bochs启动配置
├── bzImage -->linux-2.4.12的内核
├── createminix.sh -->创建minix文件系统硬盘镜像的脚本
├── creatext2.sh -->创建ext文件系统硬盘镜像的脚本
├── grub -->在grub的install时会用到
│   ├── default
│   ├── device.map
│   ├── e2fs_stage1_5
│   ├── fat_stage1_5
│   ├── installed-version
│   ├── jfs_stage1_5
│   ├── menu.lst -->现在默认是引导bzImage
│   ├── menu.lst_bak
│   ├── minix_stage1_5
│   ├── reiserfs_stage1_5
│   ├── stage1
│   ├── stage2
│   └── xfs_stage1_5
├── grub-floppy
├── grub-install
├── grub-md5-crypt
├── grub-mkdevicemap
├── grub-probe
├── grub-reboot
├── grub-set-default
├── grub_sh -->grub的命令行,但与grub目录重名,改名了
├── grub-terminfo
├── Image -->linux-0.12的内核
├── Makefile -->make qemu 启动qemu
├── mkfs -->格式化minix文件系统的命令
└── Readme.txt


2. 使用说明
2.1 创建minix的硬盘镜像
a. 执行createminix.sh脚本会在当前目录下生成hdminix.img
cong@msi:/work/os/rootfs/grub/grub0.97$ ./执行createminix.sh

b.启动qemu即可看到启动grub的界面
cong@msi:/work/os/rootfs/grub/grub0.97$ make qemu
默认是引导了bzImage,需要默认引导Image就把menu.lst中的default 0 --->default 1

2.2 创建ext2的硬盘镜像
a. 执行creatext2.sh脚本会在当前目录下生成hdc.img
cong@msi:/work/os/rootfs/grub/grub0.97$ ./creatext2.sh

b.启动qemu即可看到启动grub的界面
cong@msi:/work/os/rootfs/grub/grub0.97$ make qemu
默认是引导了bzImage