1. 根目录:
2. arch
3. score
4. kernel
5. sys_call_table.c

#include <linux/syscalls.h>
#include <linux/signal.h>
#include <linux/unistd.h>

#include <asm/syscalls.h>

#undef __SYSCALL
#define __SYSCALL(nr, call) [nr] = (call),

void *sys_call_table[__NR_syscalls] = {
#include <asm/unistd.h>
};