Hello,
I wrote a small module to trap and log all calls to execve() but the kernel
gives a segmentation fault and does not allow me to execute any programs...
extern void * sys_call_table[];
int (*orig_execve)(const char *, char const **,char const **);
int my_execve(const char * path, char const *argv[],char const * envp[])
{
printk(KERN_DEBUG "execve:%s\n",path);
return orig_execve(path,argv,envp);
}
int init_module()
{
orig_execve = sys_call_table[__NR_execve];
sys_call_table[__NR_execve]= my_execve;
return 0;
}
void cleanup_module()
{
sys_call_table[__NR_execve]= orig_execve;
}
-----------
The same thing works for mkdir and chdir system calls. execve() is the
first time i faced this problem. Is this due to something on stacks ?
regards
Sridhar
--
Anyone can do any amount of work provided it isn't the work he is supposed to
be doing
-- Murphy's Laws on Work
--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive: http://mail.nl.linux.org/kernelnewbies/
FAQ: http://kernelnewbies.org/faq/
