kexec_load

load a new kernel for later execution

sys_kexec_load(unsigned long entry, unsigned long nr_segments, struct kexec_segment *segments, unsigned long flags)

register	value
`eax`	283, the syscall number
`ebx`	unsigned long entry
`ecx`	unsigned long nr_segments
`edx`	struct kexec_segment *segments
`esi`	unsigned long flags
`eax`	the return value

Then run int 0x80 to enter the kernel.

Same syscall on other architectures