1. 根目录:
2. include
3. linux
4. a.out.h

#ifndef __A_OUT_GNU_H__
#define __A_OUT_GNU_H__

#include <uapi/linux/a.out.h>

#ifndef __ASSEMBLY__
#ifdef linux
#include <asm/page.h>
#if defined(__i386__) || defined(__mc68000__)
#else
#ifndef SEGMENT_SIZE
#define SEGMENT_SIZE	PAGE_SIZE
#endif
#endif
#endif
#endif /*__ASSEMBLY__ */
#endif /* __A_OUT_GNU_H__ */