问如何在Linux内核4.x中实现我自己的系统调用？

EN

# File name Caller  Syscall name    Args    Strong name Weak names

accept      -   accept      Ci:iBN  __libc_accept   accept
access      -   access      i:si    __access    access
close       -   close       Ci:i    __libc_close    __close close
open        -   open        Ci:siv  __libc_open __open open
read        -   read        Ci:ibn  __libc_read __read read
uname       -   uname       i:p __uname     uname
write       -   write       Ci:ibn  __libc_write    __write write

# This script is used to process the syscall data encoded in the various
# syscalls.list files to produce thin assembly syscall wrappers around the
# appropriate OS syscall. See syscall-template.s for more details on the
# actual wrapper.
#
# Syscall Signature Prefixes:
#
# E: errno and return value are not set by the call
# V: errno is not set, but errno or zero (success) is returned from the call
#
# Syscall Signature Key Letters:
#
# a: unchecked address (e.g., 1st arg to mmap)
# b: non-NULL buffer (e.g., 2nd arg to read; return value from mmap)
# B: optionally-NULL buffer (e.g., 4th arg to getsockopt)
# f: buffer of 2 ints (e.g., 4th arg to socketpair)
# F: 3rd arg to fcntl
# i: scalar (any signedness & size: int, long, long long, enum, whatever)
# I: 3rd arg to ioctl
# n: scalar buffer length (e.g., 3rd arg to read)
# N: pointer to value/return scalar buffer length (e.g., 6th arg to recvfrom)
# p: non-NULL pointer to typed object (e.g., any non-void* arg)
# P: optionally-NULL pointer to typed object (e.g., 2nd argument to gettimeofday)
# s: non-NULL string (e.g., 1st arg to open)
# S: optionally-NULL string (e.g., 1st arg to acct)
# v: vararg scalar (e.g., optional 3rd arg to open)
# V: byte-per-page vector (3rd arg to mincore)
# W: wait status, optionally-NULL pointer to int (e.g., 2nd arg of wait4)