慢慢欣赏linux 内核安装ko到指定的目录_安装kernel中的ko文件如何保留目录-优快云博客

本文介绍如何在x86开发机上为arm64目标机编译Linux内核模块，并将其安装到指定目录。通过设置环境变量及使用特定的交叉编译工具链，实现了内核模块的跨平台编译。

开发机是x86，目标机是arm64，如何在开发机将内核的ko编译完成并拷贝到目标机

在开发机如下操作：

首先设置环境变量

test/linux-kernel$ pwd
/home/test/linux-kernel
test/linux-kernel$ mkdir build
test/linux-kernel/build$ cd ..

test/linux-kernel$ export PATH=/opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin:$PATH
test/linux-kernel$ export ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
test/linux-kernel$ export CC=aarch64-linux-gnu-gcc
test/linux-kernel$ export INSTALL_MOD_PATH=/home/test/linux-kernel/build

完成menconfig之后完成编译动作

test/linux-kernel$ make 
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  Building modules, stage 2.
  MODPOST 305 modules

开始安装到指定目录

test/linux-kernel$ make modules_install
  INSTALL arch/arm64/crypto/aes-neon-bs.ko
  INSTALL arch/arm64/crypto/chacha20-neon.ko
... ...
  INSTALL sound/hda/snd-hda-core.ko
  INSTALL sound/pci/hda/snd-hda-codec.ko
  INSTALL sound/soc/codecs/snd-soc-hdmi-codec.ko
  INSTALL sound/soc/generic/snd-soc-audio-graph-card.ko
  INSTALL sound/soc/generic/snd-soc-simple-card-utils.ko
  INSTALL sound/soc/generic/snd-soc-simple-card.ko
  DEPMOD  4.19.111-embeded

查看目标文件

test/linux-kernel$ ls buil
build/      built-in.a  
test/linux-kernel$ ls buil
build/      built-in.a  
test/linux-kernel$ ls build
lib
test/linux-kernel$ ls build/lib/
modules
test/linux-kernel$ ls build/lib/modules/
4.19.111-embeded
test/linux-kernel$ ls build/lib/modules/4.19.111-embeded/
build   modules.alias      modules.builtin            modules.builtin.bin  modules.dep.bin  modules.order    modules.symbols      source
kernel  modules.alias.bin  modules.builtin.alias.bin  modules.dep          modules.devname  modules.softdep  modules.symbols.bin

然后把 build/lib/modules/4.19.111-embeded 拷贝到目标机的 /lib/modules 目录下