ARM架构内核模块的交叉编译 [英] Cross-compiling of kernel module for ARM architecture

问题描述

我正在尝试从 linux x86 机器为 ARM 制作一个 .ko 文件.我尝试了以下 Makefile:

I'm trying to make a .ko file for ARM from a linux x86 machine. I tried the following Makefile:

1 obj-m +=helloworldtest_module.o 
2 modules_install:
3     make ARCH=$(ARCH) CC=$(CROSS_COMPILER) -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
4 clean:
5     make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

...但我在命令提示符下给出 make -f Makefile ARCH=arm CROSS_COMPILER=arm-linux-gnueabi-gcc 时出错，如下所示:

... but I got an error on giving make -f Makefile ARCH=arm CROSS_COMPILER=arm-linux-gnueabi-gcc in command prompt as follows:

make ARCH=arm CC=arm-linux-gnueabi-gcc -C /lib/modules/3.2.0-29-generic/build M=/home/terenesas/sample modules
make[1]: Entering directory `/usr/src/linux-headers-3.2.0-29-generic'
  CC [M]  /home/terenesas/sample/helloworldtest_module.o
In file included from /usr/src/linux-headers-3.2.0-29-generic/arch/arm/include/asm/types.h:4:0,
                 from include/linux/types.h:4,
                 from include/linux/list.h:4,
                 from include/linux/module.h:9,
                 from /home/terenesas/sample/helloworldtest_module.c:2:
include/asm-generic/int-ll64.h:11:29: fatal error: asm/bitsperlong.h: No such file or directory
compilation terminated.
make[2]: *** [/home/terenesas/sample/helloworldtest_module.o] Error 1
make[1]: *** [_module_/home/terenesas/sample] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-3.2.0-29-generic'
make: *** [modules_install] Error 2

我做错了什么?

推荐答案

shell uname -r 意味着此 Makefile 将为您的主机(x86)系统而不是为 ARM 构建模块.

shell uname -r means that this Makefile will build the module for you host(x86) system and not for ARM.

您需要指定 ARM 内核的源目录.您可以使用以下 Makefile 交叉编译您的模块.

You need to specify the source directory of your ARM Kernel. You may use following Makefile to cross-compile your module.

生成文件:

CC=$(CROSS_COMPILE)gcc
# If KERNELRELEASE is defined, we've been invoked from the
# kernel build system and can use its language.
ifneq ($(KERNELRELEASE),)
    obj-m := modulename.o 

# Otherwise we were called directly from the command
# line; invoke the kernel build system.
else

    KERNELDIR ?= /path/to/kernel/linux
    PWD  := $(shell pwd)

default:
    ${MAKE} -C ${KERNEL_SOURCE} SUBDIRS=${PWD} modules

clean:
    ${MAKE} -C ${KERNEL_SOURCE} SUBDIRS=${PWD} clean
endif

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