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

#ifndef __SYSDEP_X86_PTRACE_H
#define __SYSDEP_X86_PTRACE_H

#ifdef __i386__
#include "ptrace_32.h"
#else
#include "ptrace_64.h"
#endif

static inline long regs_return_value(struct uml_pt_regs *regs)
{
	return UPT_SYSCALL_RET(regs);
}

#endif /* __SYSDEP_X86_PTRACE_H */