These are some examples to help you going. No guarantee these work in all circumstances. Just as a guideline.
Kexecboot :
Create a file boot.cfg in /boot on you ALARM partition if you need a boot menu entry for dual boot etc.
Make sure to change your root= entry to match your setup.
Example: LABEL=ArchLinux
KERNEL=/boot/zImage-3.11.3-c3x00
APPEND=root=/dev/sda3 rootfstype=ext3 fbcon=rotate:1 noinitrd loglevel=3 pxa27x_maxfreq=624
LABEL=Debian
KERNEL=/boot/zImage-2.6.36-rc3
APPEND=console=ttyS0,115200n8 root=/dev/hda1 rootfstype=ext3 console=tty1 noinitrd fbcon=rotate:1 debug dyntick=enable
fstab :
Make sure to change to your file system type, and root device /dev/hdax etc
Example:
/dev/hda3 / ext3 noatime,nodiratime,commit=600,reservation,defaults,errors=remount-ro 0 1