hai,
I have a problem in loading a module ,it is giving segmentation fault,
when I do the /sbin/lsmod
signal4 944 (initializing)
here signal4 is my module name.I am using 2.4.20-8 kernel.
And I am unable to remove this module also.
following is the code of my module
#include <bits/signum.h> /* signal number macros SIGHUP etc. */
#include <linux/kernel.h> /* printk level */
#include <linux/module.h> /* kernel version etc. */
#include <linux/sched.h> /* task_struct */
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Signal to a user-space app from a kernel module");
int pid=0;
MODULE_PARM(pid,"i");
int
ksignal(int pid,int signum)
{
struct task_struct x;
struct task_struct *p;
/* run through the task list of linux until we find our pid */
//for (p = &init_task ; (p = next_task(p)) != &init_task ; ){
for (p = &x ; (p = next_task(p)) != &x ; ){
if(p->pid == pid){
printk("sending signal %d for pid %d\n",signum,(int)p->pid);
/* don't have a sig_info struct to send along - pass 0 */
return send_sig(signum,p,0);
}
}
/* did not find the requested pid */
return -1;
}
int
init_module(void)
{
/* send pid a SIGKILL */
ksignal(2345,SIGKILL);
return 0;
}
void
cleanup_module(void)
{
printk("out of here\n");
}
-----------------------
my makefile is:
TARGET := signal4
WARN := -W -Wall -Wstrict-prototypes -Wmissing-prototypes
INCLUDE := -isystem /lib/modules/2.4.20-8feb9.1/build/include
CFLAGS := -O2 -DMODULE -D__KERNEL__ ${WARN} ${INCLUDE}
CC := gcc
${TARGET}.o: ${TARGET}.c
.PHONY: clean
Any suggestions are welcome.
Thanks&Regards,
P.Manohar.
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