1. 根目录:
2. arch
3. x86
4. um
5. asm
6. module.h

#ifndef __UM_MODULE_H
#define __UM_MODULE_H

/* UML is simple */
struct mod_arch_specific
{
};

#ifdef CONFIG_X86_32

#define Elf_Shdr Elf32_Shdr
#define Elf_Sym Elf32_Sym
#define Elf_Ehdr Elf32_Ehdr

#else

#define Elf_Shdr Elf64_Shdr
#define Elf_Sym Elf64_Sym
#define Elf_Ehdr Elf64_Ehdr

#endif

#endif