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#!/bin/sh
AS_BOOT="nasm -fbin -Isrc/boot/"
AS_KERN="nasm -fbin -Isrc/boot/ -Isrc/kernel/"
SRC_DIR="src"
DST_DIR="dst"
IMG_FILE="disk.img"
ISO_FILE="disk.iso"
NAME="kotoriforth"
clean()
{
rm -f $IMG_FILE
rm -f $ISO_FILE
rm -rf $DST_DIR
}
build()
{
clean
mkdir -p $DST_DIR/boot
$AS_BOOT $SRC_DIR/boot/boot.stage1.asm -o $DST_DIR/s1_boot.bin
$AS_BOOT $SRC_DIR/boot/boot.stage2.asm -o $DST_DIR/s2_boot.bin
$AS_KERN $SRC_DIR/kernel/kernel.asm -o $DST_DIR/kernel.bin
dd if=/dev/zero of=disk.img bs=512 count=2048
dd if=$DST_DIR/s1_boot.bin of=$IMG_FILE conv=notrunc bs=512 count=1
echo "Written s1_boot.bin to $IMG_FILE"
dd if=$DST_DIR/s2_boot.bin of=$IMG_FILE conv=notrunc bs=512 seek=1
echo "Written s2_boot.bin to $IMG_FILE"
S2_SECTORS=$(( ($(wc -c < "$DST_DIR/s2_boot.bin") + 511) / 512 ))
KERNEL_OFFSET=$((1 + S2_SECTORS))
dd if=$DST_DIR/kernel.bin of=$IMG_FILE conv=notrunc bs=512 \
seek=$KERNEL_OFFSET status=none
echo "Written kernel.bin to $IMG_FILE"
xorriso -as mkisofs \
-b $IMG_FILE \
-no-emul-boot \
-boot-load-size 4 \
-boot-info-table \
-iso-level 3 \
-J \
-R \
-V "$NAME" \
-o $ISO_FILE \
"$(dirname "$IMG_FILE")"
if [ -f $ISO_FILE ]; then
echo "Bootable ISO created"
fi
}
run()
{
qemu-system-i386 -cdrom $IMG_FILE
}
debug()
{
qemu-system-i386 -cdrom $IMG_FILE -S -s
}
case $1 in
"clean") clean ;;
"build") build ;;
"run") run ;;
"debug") debug ;;
*) echo "Use clean|build|run|debug" ;;
esac
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