Hi All,
I want to trace the trace the system call sys_execve().I wrote the code
(plz refer below).The messgage is displayed after that segmentation fault is
coming.My code may be wrong.Plz clear me for which i would be thankful.Thank
u in advance
Kannan Ram
code:
#include<linux/kernel.h>
#include<linux/module.h>
#include<asm/uaccess.h>
#include<sys/stscall.h>
extern void *sys_call_table[];
asmlinkage int (*original_sys_execve)(struct pt_regs regs);
asmlinkage int my_sys_execve(struct pt_regs regs)
{
printk("From my_sys_exeve\n");
return original_sys_execve(regs);
}
int init_module()
{
original_sys_execve=sys_call_table[__NR_execve];
sys_call_table[__NR_execve]=my_sys_execve;
return 0;
}
void cleanup_module()
{
sys_call_table[__NR_execve]=original_sys_execve;
}
after insering
if i give commands like :ls
I am getting output "From my_sys_execv" then segmentation fault
What went wrong?
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