无法为BeagleBone Debian编译内核模块

时间:2015-10-01 14:22:59

标签: linux makefile linux-kernel debian beagleboneblack

我正在关注Derek Molloys guide构建可加载的内核模块,但在某些时候会遇到问题。

我在.c文件中有内核代码: 的的hello.c

#include <linux/init.h>             // Macros used to mark up functions e.g., __init __exit
#include <linux/module.h>           // Core header for loading LKMs into the kernel
#include <linux/kernel.h>           // Contains types, macros, functions for the kernel

MODULE_LICENSE("GPL");              ///< The license type -- this affects runtime behavior
MODULE_AUTHOR("Derek Molloy");      ///< The author -- visible when you use modinfo
MODULE_DESCRIPTION("A simple Linux driver for the BBB.");  ///< The description -- see modinfo
MODULE_VERSION("0.1");              ///< The version of the module

static char *name = "world";        ///< An example LKM argument -- default value is "world"
module_param(name, charp, S_IRUGO); ///< Param desc. charp = char ptr, S_IRUGO can be read/not changed
MODULE_PARM_DESC(name, "The name to display in /var/log/kern.log");  ///< parameter description

/** @brief The LKM initialization function
 *  The static keyword restricts the visibility of the function to within this C file. The __init
 *  macro means that for a built-in driver (not a LKM) the function is only used at initialization
 *  time and that it can be discarded and its memory freed up after that point.
 *  @return returns 0 if successful
 */
static int __init helloBBB_init(void){
   printk(KERN_INFO "EBB: Hello %s from the BBB LKM!\n", name);
   return 0;
}

/** @brief The LKM cleanup function
 *  Similar to the initialization function, it is static. The __exit macro notifies that if this
 *  code is used for a built-in driver (not a LKM) that this function is not required.
 */
static void __exit helloBBB_exit(void){
   printk(KERN_INFO "EBB: Goodbye %s from the BBB LKM!\n", name);
}

/** @brief A module must use the module_init() module_exit() macros from linux/init.h, which
 *  identify the initialization function at insertion time and the cleanup function (as
 *  listed above)
 */
module_init(helloBBB_init);
module_exit(helloBBB_exit);

和makefile一样: 的生成文件

obj-m+=hello.o

all:
make -C /lib/modules/$(shell uname -r)/build/ M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build/ M=$(PWD) clean

当我尝试在带有onl上述两个文件的目录中运行make时,我得到了

  

制作:没有什么可以为所有人做的

我正在运行 3.8.13-bone47 ,但我无法在Derek推荐的link上找到匹配的确切头文件,因此我下载了 3.8.13-bone71 代替。这可能是问题吗?当我直接在BeagleBone上编译时,是否必须下载标题?我也尝试将Makefile中的行更改为与我的匹配的硬编码分发名称(3.8.13-bone47),也不起作用。

非常感谢你们!

1 个答案:

答案 0 :(得分:1)

我解决了我的问题。我有两个问题:

在Makefile中缺少制表符 我使用make语句在每行的开头添加了一个制表符。它必须是一个实际的标签,&lt; \ t&gt;不适合我。

错误的页眉文件 事实证明,头文件的正确版本非常重要:)我从http://rcn-ee.net/deb/trusty-armhf/v3.8.13-bone47/获得了那些并添加了mach / timex.h文件,并且能够从那时起遵循Derek的指南。