Hi
I am trying to install a module I wrote using "insmod" on "linux-2.4.18-19.8.0" and I get the
following error.
This is the first linux kernel module that I have written.
Do I need to do a mknod before I do an insmod ? (my kernel module is a simple character driver that
just loops thru the pci devices in the system and returns the <board,slot> information for the given
<vendorId,deviceId>)
***ERROR BEGIN****
# insmod queryDevice.o
queryDevice.o: unresolved symbol open
queryDevice.o: unresolved symbol close
queryDevice.o: unresolved symbol puts
queryDevice.o: unresolved symbol printf
queryDevice.o: unresolved symbol strerror
queryDevice.o: unresolved symbol ioctl
queryDevice.o:
Hint: You are trying to load a module without a GPL compatible license
and it has unresolved symbols. Contact the module supplier for
assistance, only they can help you.
****ERROR END****
Would someone be kind enough to let me know what I am doing wrong?
Do I need any additional libraries that I need to link with ?
I have attached a section of the code if that helps.
I am using the GNU specific file ops initiliazation. Could this be the problem?
Any help would be greatly appreciated.
Thanks for your time
Vijay
************CODE SEGMENT BEGIN************
#ifndef __KERNEL__
#define __KERNEL__
#endif
#ifndef MODULE
#define MODULE
#endif
// ... OS include files
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioctl.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <asm/uaccess.h>
#include <asm/io.h>
// ... Static variable declarations
static int queryMajorNum;
static int queryDevRegistered = 0;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// ... Constants
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
MODULE_AUTHOR("Vijay Venkata");
MODULE_SUPPORTED_DEVICE("All Devices on pcibus with a vendorId and deviceId");
MODULE_DESCRIPTION("Provides Query mechanism to get slot information for a"
"given <vendorId,deviceId> tuple");
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// ... Data Types
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// ... The Query Device
typedef struct
{
// ... Nothing Device specific
}query_Dev;
// ... The pci device
static struct pci_dev* pPciDev = NULL;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// ... Device File Operations
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// ... The file operations on this device, GNU Specific
struct file_operations queryDevice_fops =
{
open: queryDevice_open,
ioctl: queryDevice_ioctl,
release: queryDevice_close
};
// ... Implementation here
*********CODE SEGMENT END***********
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