ismailhkose/gist:8805223819f65858e36d0d3e4fd5edc8

## gistfile1.txt
TOP=$HOME/8-23-qemu_x86/

mkdir -pv $TOP/obj/busybox-x86

cd $TOP
curl https://busybox.net/downloads/busybox-1.26.2.tar.bz2 | tar -xj

cd busybox-1.26.2
mkdir -pv bb_build
make O=bb_build defconfig


make O=../obj/busybox-x86 menuconfig

# Busybox Settings  ---> choose * Build BusyBox as a static binary (no shared libs)
cd bb_build
make -j8
make install


BUSYBOX_INSTALL_DIR=$TOP/busybox-1.26.2/bb_build/_install


# BUILD LINUX KERNEL
cd $TOP
curl https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.2.tar.xz | tar xJf -
cd linux-4.9.2
mkdir build1
make O=build1 defconfig
cd build1
make -j8


#make ARCH=x86 x86_64_defconfig
#make O=build1 ARCH=x86 x86_64_defconfig

# Create Initramfs

mkdir -pv $TOP/initramfs
cd $TOP/initramfs
mkdir ./{etc,sys,proc}
cp -av $BUSYBOX_INSTALL_DIR/* .
rm linuxrc

# Create Init file
cat >> init << EOF
#!/bin/sh
mount -t proc none /proc
mount -t sysfs none /sys
echo -e "Hello World\n"
exec /bin/sh
EOF

chmod +x init
find . -print0 | cpio --null -ov --format=newc  > initramfs.cpio

# We could also have created the initramfs as a compressed archive using gzip:
# find . -print0 | cpio --null -ov --format=newc | gzip -9 > initramfs.cpio.gz

cd ../
cp $TOP/linux-4.9.2/build1/arch/x86_64/boot/bzImage $TOP
cp $TOP/initramfs/initramfs.cpio $TOP
ll

export DISPLAY=:0

# Boot With initramfs
qemu-system-x86_64 -kernel bzImage -initrd initramfs.cpio -m 512 -nographic -append console=ttyS0
	TOP=$HOME/8-23-qemu_x86/

	mkdir -pv $TOP/obj/busybox-x86

	cd $TOP
	curl https://busybox.net/downloads/busybox-1.26.2.tar.bz2 \| tar -xj

	cd busybox-1.26.2
	mkdir -pv bb_build
	make O=bb_build defconfig


	make O=../obj/busybox-x86 menuconfig

	# Busybox Settings ---> choose * Build BusyBox as a static binary (no shared libs)
	cd bb_build
	make -j8
	make install


	BUSYBOX_INSTALL_DIR=$TOP/busybox-1.26.2/bb_build/_install


	# BUILD LINUX KERNEL
	cd $TOP
	curl https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.2.tar.xz \| tar xJf -
	cd linux-4.9.2
	mkdir build1
	make O=build1 defconfig
	cd build1
	make -j8


	#make ARCH=x86 x86_64_defconfig
	#make O=build1 ARCH=x86 x86_64_defconfig

	# Create Initramfs

	mkdir -pv $TOP/initramfs
	cd $TOP/initramfs
	mkdir ./{etc,sys,proc}
	cp -av $BUSYBOX_INSTALL_DIR/* .
	rm linuxrc

	# Create Init file
	cat >> init << EOF
	#!/bin/sh
	mount -t proc none /proc
	mount -t sysfs none /sys
	echo -e "Hello World\n"
	exec /bin/sh
	EOF

	chmod +x init
	find . -print0 \| cpio --null -ov --format=newc > initramfs.cpio

	# We could also have created the initramfs as a compressed archive using gzip:
	# find . -print0 \| cpio --null -ov --format=newc \| gzip -9 > initramfs.cpio.gz

	cd ../
	cp $TOP/linux-4.9.2/build1/arch/x86_64/boot/bzImage $TOP
	cp $TOP/initramfs/initramfs.cpio $TOP
	ll

	export DISPLAY=:0

	# Boot With initramfs
	qemu-system-x86_64 -kernel bzImage -initrd initramfs.cpio -m 512 -nographic -append console=ttyS0