1. 根目录:
2. arch
3. x86
4. um
5. shared
6. sysdep
7. kernel-offsets.h

#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/elf.h>
#include <linux/crypto.h>
#include <asm/mman.h>

#define DEFINE(sym, val) \
	asm volatile("\n->" #sym " %0 " #val : : "i" (val))

#define BLANK() asm volatile("\n->" : : )

#define OFFSET(sym, str, mem) \
	DEFINE(sym, offsetof(struct str, mem));

void foo(void)
{
#include <common-offsets.h>
}