Visit Our UNIX and Linux User Community

Top Forums UNIX for Advanced & Expert Users Kernel module compilation problem Post 302300636 by natraj on Tuesday 24th of March 2009 04:17:37 PM
Old 03-24-2009
Kernel module compilation problem

Dear Marcintom,

Just saw your post on compiling the kernel modules spanning multiple files. I am not able to do it .
I have one file mod.c (the main kernel module) and one list.c (which is the library)
Could you please help me with the following questions ..
1) Is a header file needed (list.h) to be included in the mod.c ?
2) do we need to write the list.c in the kernel mode (using #define __kernel___) and using kmalloc etc ?
3) How would you write the make file ?

Right now If i try writing list.c in the kernel mode and use the makefile that u have give it give a lot of compile errors and if i write it in the user mode it give un known symobol while loading the module somehow it is not able to link would be great if you could please help.

Test Your Knowledge in Computers #420
Difficulty: Medium
JavaScript supports much of the structured programming syntax from C (e.g., if statements, while loops, switch statements, do while loops, etc.).
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Kernel compilation

I have re-compiled kernel source code available in /usr/src/linux.2.4.20 with "make" command. The compilation is succesful. Now the problem is create the image for this. The documentation in the same folder says that now you have compile "make image". There is no option for image in Makefile. ... (3 Replies)
Discussion started by: mankrish
3 Replies

2. SuSE

max number of slabs per kernel module (kernel 2.6.17, suse)

Hi All, Is there a max number of slabs that can be used per kernel module? I'm having a tough time finding out that kind of information, but the array 'node_zonelists' (mmzone.h) has a size of 5. I just want to avoid buffer overruns and other bad stuff. Cheers, Brendan (4 Replies)
Discussion started by: Brendan Kennedy
4 Replies

3. Red Hat

Problem with kernel-module-ntfs

Hi All Im trying to access the my windows XP NTFS from Redhat linux 4.0 Enterprise edition I have downloaded the respective rpm And im able to install it successfully Then i have given the following command , but got an error Here are my partitions And when i give the below... (1 Reply)
Discussion started by: balumankala
1 Replies

4. Linux

How to convert Linux Kernel built-in module into a loadable module

Hi all, I am working on USB data monitoring on Fedora Core 9. Kernel 2.6.25 has a built-in module (the one that isn't loadable, but compiles and links statically with the kernel during compilation) to snoop USB data. It is in <kernel_source_code>/drivers/usb/mon/. I need to know if I can... (0 Replies)
Discussion started by: anitemp
0 Replies

5. Linux

problem with kernel module loading

Hi masters, I am new to linux and unix forum and this is my first forum. So please excuse if I am not giving sufficient information. I will give them on request. I have created a bandwidth manager module. I am using a 2.6.9 kernel and in Red Hat 3.4.3 distribution. But when i run make... (1 Reply)
Discussion started by: iamjayanth
1 Replies

6. UNIX and Linux Applications

Apache module compilation error

I'm trying to compile an apache module (a tutorial module, Apache 2 Module Tutorial - GNU Build Tools and the Development Environment) and I get errors like this: apr.h:273: error: expected ´=´, ´,´,´;´,´asm´ or ´__attribute__´ before ´apr_off_t´ those errors occur like 30 times in different... (4 Replies)
Discussion started by: hjalle
4 Replies

7. Red Hat

Kernel compilation for s3c2440

Hi All, I am trying to compile Kernel 2.6.31 with arm-linux-gcc3.2.2 for s3c2440a, but I am not able to perform the task. I am using Redhat 9 firstly i am using the following commands $make s3c2410_defconfig // there is no error in execution of this command next i run $make ... (0 Replies)
Discussion started by: niranjanvg
0 Replies

8. Linux

Linux kernel compilation

I have complied the kernel with a default settings... now if I load this kernel , it'll load perfectly but the INTERNET is not workink... I think in the default settings The network modules are not included.. Can anybody help me out with the selection of the network module when i give "make... (1 Reply)
Discussion started by: naresh046
1 Replies

9. UNIX for Dummies Questions & Answers

Kernel Compilation Issue

I have installed ubuntu 11.04 on my system. After this when I used to give uname -r it showed me kernel version as 2.6.38. Now I had downloaded kernel from and installed it using the following steps: make make modules make modules_install make install This created... (2 Replies)
Discussion started by: rupeshkp728
2 Replies

10. Linux

Unload kernel module at boot time (Debian Wheezy 7.2, 3.2.0-4-686-pae kernel)

Hi everyone, I am trying to prevent the ehci_hcd kernel module to load at boot time. Here's what I've tried so far: 1) Add the following line to /etc/modprobe.d/blacklist.conf (as suggested here): 2) Blacklisted the module by adding the following string to 3) Tried to blacklist the module... (0 Replies)
Discussion started by: gacanepa
0 Replies
INTRO(9)						   BSD Kernel Developer's Manual						  INTRO(9)

intro -- introduction to system kernel interfaces DESCRIPTION
This section contains information about the interfaces and subroutines in the kernel. PROTOTYPES ANSI-C AND ALL THAT Yes please. We would like all code to be fully prototyped. If your code compiles cleanly with cc -Wall we would feel happy about it. It is important to understand that this is not a question of just shutting up cc, it is a question about avoiding the things it complains about. To put it bluntly, do not hide the problem by casting and other obfuscating practices, solve the problem. INDENTATION AND STYLE
Believe it or not, there actually exists a guide for indentation and style. It is not generally applied though. We would appreciate if people would pay attention to it, and at least not violate it blatantly. We do not mind it too badly if you have your own style, but please make sure we can read it too. Please take time to read style(9) for more information. NAMING THINGS
Some general rules exist: 1. If a function is meant as a debugging aid in DDB, it should be enclosed in #ifdef DDB #endif /* DDB */ And the name of the procedure should start with the prefix DDB_ to clearly identify the procedure as a debugger routine. SCOPE OF SYMBOLS
It is important to carefully consider the scope of symbols in the kernel. The default is to make everything static, unless some reason requires the opposite. There are several reasons for this policy, the main one is that the kernel is one monolithic name-space, and pollution is not a good idea here either. For device drivers and other modules that do not add new internal interfaces to the kernel, the entire source should be in one file if possi- ble. That way all symbols can be made static. If for some reason a module is split over multiple source files, then try to split the module along some major fault-line and consider using the number of global symbols as your guide. The fewer the better. SEE ALSO
style(9) HISTORY
The intro section manual page appeared in FreeBSD 2.2. BSD
December 13, 1995 BSD

Featured Tech Videos

All times are GMT -4. The time now is 01:39 PM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy