在Linux中编译内核模块时遇到麻烦 [英] trouble compiling a kernel module in linux

问题描述

我写了一个简单的hello world内核模块.我写了一个make文件，如下所示:

I wrote a simple hello world kernel module. A make file was written by me as below:

obj -m += hello.o

KDIR: /usr/src/linux-headers-3.2.0-21-generic-pae

all:
     $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules

clean:
     rm -rf *.o *.ko *.mod.* *.symvers *.order

然后我使用make编译了模块.它工作得很好.

Then I compiled the module using make. It worked just fine.

然后，最近，当内核更新为3.2.0-24时，我再次执行了"make"操作(当然，我在KDIR中将版本更改为24).但是出现了以下错误:

Then, recently I did 'make' again when the kernel was updated to 3.2.0-24(of course I changed the version to 24 in KDIR). But the following error cropped up:

make[1]: Entering directory `/usr/src/linux-headers-3.2.0-24-generic-pae'
make[2]: *** No rule to make target `arch/x86/tools/relocs.c', needed
by `arch/x86/tools/relocs'.  Stop.

我检查并发现/arch/x86/tools/中存在relocs的可执行文件，但没有relocs.c

I checked and found that an executable file of relocs was there at /arch/x86/tools/ but there was no relocs.c

出了什么问题，如何纠正它才能成功编译模块?

What went wrong and how should I correct it so that I successfully compile the module?

推荐答案

请共享您编写的hello-world模块代码.

Pls share the hello-world module code that you have written.

relocs.c位于内核src内的arch/x86/tools下.

relocs.c is present under arch/x86/tools inside the kernel src.

由于您的计算机上仅安装了linux-header，因此可能看不到relocs.c文件. 您必须下载整个内核src.

As you have only linux-headers installed on your machine you may not see relocs.c file. You have to download the entire kernel src.

请按照以下步骤操作:

$ sudo apt-get更新

$ sudo apt-get update

$ sudo apt-get install linux-source.

$ sudo apt-get install linux-source.

作为一个试验(下载内核src之后)，您可以更改makefile以将KDIR指向整个内核目录，然后构建您的模块.

As a trial (after downloading kernel src) you can change the makefile to point KDIR to the entire kernel dir and then build your module.

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