OpenWRT 增加内核模块及应用方法

进入package目录,创建模块目录

cd mcp/branches/V1.1-beta1/mcp/package

mkdir example

进入example目录,创建Makefile文件和代码路径

cd example

touch Makefile

mkdir src

Makefile具体内容如下:

# Kernel module example

include $(TOPDIR)/rules.mk

include $(INCLUDE_DIR)/kernel.mk

PKG_NAME:=example

PKG_RELEASE:=1

include $(INCLUDE_DIR)/package.mk

define KernelPackage/example

SUBMENU:=Other modules

DEPENDS:=@TARGET_octeon

TITLE:=Support Module for example

AUTOLOAD:=$(call AutoLoad,81,example)

FILES:=$(PKG_BUILD_DIR)/example/example.$(LINUX_KMOD_SUFFIX)

endef

define Build/Prepare

mkdir -p $(PKG_BUILD_DIR)

$(CP) -R ./src/* $(PKG_BUILD_DIR)/

endef

define Build/Compile

$(MAKE) -C "$(LINUX_DIR)" \

CROSS_COMPILE="$(TARGET_CROSS)" \

ARCH="$(LINUX_KARCH)" \

SUBDIRS="$(PKG_BUILD_DIR)/example" \

EXTRA_CFLAGS="-g $(BUILDFLAGS)" \

modules

endef

$(eval $(call KernelPackage,example))

进入src目录,创建代码路径和相关源文件

cd src

mkdir example

cd example

touch example.c Kconfig Makefile

example.c具体内容如下:

#include

#include

#include

/* hello_init ---- 初始化函数,当模块装载时被调用,如果成功装载返回0 否则返回非0值 */

static int __init hello_init(void)

{

printk("I bear a charmed life.\n");

return 0;

}

/ * hello_exit ---- 退出函数,当模块卸载时被调用 */

static void __exit hello_exit(void)

{

printk("Out, out, brief candle\n");

}

module_init(hello_init);

module_exit(hello_exit);

MODULE_LICENSE("GPL");

MODULE_AUTHOR("zhangjiefeng");

Kconfig具体内容如下:

config EXAMPLE

tristate "Just a example"

default n

help

This is a example, for debugging kernel model.

If unsure, say N.

Makefile具体内如如下:

obj-m := example.o

回到主路径 mcp/branches/V1.1-beta1/mcp/,编译选项配置保存并编译

make menuconfig

Kernel modules --->

Other modules --->

kmod-example

选项设置为M,保存退出

然后编译该模块:

make package/example/compile

编译出的文件可以在主路径的以下路径找到

./staging_dir/target-mips64_eglibc-2.10.1/root-octeon/lib/modules/2.6.30.9/

./build_dir/linux-octeon/example/ipkg-octeon/kmod-example/lib/modules/2.6.30.9/

./build_dir/linux-octeon/example/example/

文件名为:example.ko

注:我们使用./build_dir/linux-octeon/example/example/example.ko

用户态工具添加方法

进入package目录,创建工具目录

cd mcp/branches/V1.1-beta1/mcp/package

mkdir example1

进入example1目录,创建Makefile文件和代码路径

cd example1

touch Makefile

mkdir src

该Makefile具体内容如下:

#User mode tool example

include $(TOPDIR)/rules.mk

include $(INCLUDE_DIR)/kernel.mk

PKG_NAME:=example1

PKG_RELEASE:=1

PKG_BUILD_DIR := $(KERNEL_BUILD_DIR)/$(PKG_NAME)

include $(INCLUDE_DIR)/package.mk

define Package/example1

SECTION:=utils

CATEGORY:=Base system

TITLE:=Build for example1 commands

endef

define Package/example1/description

This package contains an utility useful to use example1 commands.

endef

define Build/Prepare

mkdir -p $(PKG_BUILD_DIR)

$(CP) ./src/* $(PKG_BUILD_DIR)/

endef

target=$(firstword $(subst -, ,$(BOARD)))

MAKE_FLAGS += TARGET="$(target)"

TARGET_CFLAGS += -Dtarget_$(target)=1 -Wall

define Build/example1/compile

$(MAKE) -C "$(LINUX_DIR)" \

CROSS_COMPILE="$(TARGET_CROSS)" \

ARCH="$(LINUX_KARCH)" \

SUBDIRS="$(PKG_BUILD_DIR)" \

EXTRA_CFLAGS="$(BUILDFLAGS)"

endef

define Package/example1/install

$(INSTALL_DIR) $(1)/sbin

$(INSTALL_BIN) $(PKG_BUILD_DIR)/example1 $(1)/sbin/

endef

$(eval $(call BuildPackage,example1))

进入src目录,创建相关源文件

cd src

touch example1.c Makefile

example1.c 具体内容如下:

#include

int main(void)

{

printf("Hello, world\n");

return 0;

}

Makefile文件具体内容如下:

.NOTPARALLEL:

#OCTEON_ROOT=$(PWD)/src/

CC=~/openwrt/main/staging_dir/toolchain-mips64_gcc-4.4.1_eglibc-2.10.1/usr/bin/mips64-openwrt-linux-gnu-gcc

CFLAGS=-mips64r2 -mabi=64 -march=octeon -mtune=octeon

LFLAGS=

.PHONY: all

all: example1

example1:example1.c

${CC} ${CFLAGS} ${LFLAGS} -W -g -Wall -Wno-unused-parameter -DUSE_RUNTIME_MODEL_CHECKS=1 \

-o $@ example1.c

回到主路径 mcp/branches/V1.1-beta1/mcp/,编译选项配置保存并编译

make menuconfig

Base system --->

example1

选项设置为M,保存退出

然后编译该模块:

make package/example1/compile

编译出的文件可以在主路径的以下路径找到

./staging_dir/target-mips64_eglibc-2.10.1/root-octeon/sbin/

./build_dir/linux-octeon/example1/ipkg-octeon/example1/sbin/

./build_dir/linux-octeon/example1/

文件名为:example1

注:我们使用./build_dir/linux-octeon/example1/example1

根据OpenWrt安装介绍,将内核模块和用户态工具在板子上运行,到这就简单了往下我就不贴了。

本文由http://www.wifidog.pro/2015/01/30/openwrt%E6%B7%BB%E5%8A%A0%E6%A8%A1%E5%9D%97.html 整理编辑,转载请注明出处

你可能感兴趣的:(OpenWRT 增加内核模块及应用方法)