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BUILD KERNEL AND BOOT TO OWN APPLICATION
========================================
Manuel Traut
retrive kernel source
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normaly download it from kernel.org or use git:
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home# git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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or download it from my laptop (it's faster..)
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home# git clone http://<MYMACHINE>/linux
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configure the kernel for your machine
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download the config for qemu from my webmachine
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home# mkdir linux-qemu
home# cd linux-qemu
home/linux-qemu# wget http://mecka.net/hswgt/uebung1/config-qemu -O .config
home/linux-qemu# cd ..
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you can create an initial config, or modify a given config with this command
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home# cd linux
home/linux# ARCH=i386 CFLAGS=-m32 make O=../linux-qemu menuconfig
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build the kernel
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home/linux# ARCH=i386 CFLAGS=-m32 make O=../linux-qemu -j5
home/linux# cd ..
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boot the kernel with qemu
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home# qemu-system-i386 -kernel linux-qemu/arch/x86/boot/bzImage \
-nographic -append "console=ttyS0,115200"
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generated a harddisk image
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home# dd if=/dev/zero of=hd.img bs=1024 count=4000
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format the harddisk image
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home# /sbin/mkfs.ext4 hd.img
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build your own application and link it static
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home# mkdir hello
home# cd hello
home/hello# $EDITOR hello.c
home/hello# gcc -static -m32 -o hello hello.c
home/hello# cd ..
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use e2cp or loopback mount to copy your application to the image
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home# e2cp -P 777 hello/hello hd.img:/
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boot the kernel and let it start your application
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home# qemu-system-i386 -kernel linux-qemu/arch/x86/boot/bzImage \
-drive file=hd.img,if=virtio \
-nographic -append "console=ttyS0,115200 root=/dev/vda init=/hello"
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