linux 内核进程监控 针对bash下启动的程序

#include
#include
#include
#include
/* For each probe you need to allocate a kprobe structure */
static struct kprobe kp = {
.symbol_name    = "sys_execve",
};

/* kprobe pre_handler: called just before the probed instruction is executed */
static int handler_pre(struct kprobe *p, struct pt_regs *regs)
{
#ifdef CONFIG_X86

printk(KERN_INFO "pre_handler: p->addr = 0x%p, ip = %lx,"
" flags = 0x%lx,pid=%d,comm=%s,name=%s\n",
p->addr, regs->ip, regs->flags,current->pid,current->comm,*((char **)regs->si));
char ** argv = (char **) regs->si;
size_t exec_line_size=0;

while(NULL!=*argv)
{
exec_line_size=exec_line_size+strlen(*argv)+1;
argv++;
}
char *str = vmalloc(exec_line_size);
if (NULL!=str)
{
memset(str,0,exec_line_size);

argv = (char **) regs->si;
while (NULL != *argv) {

snprintf(str, exec_line_size,
"%s%s",str, *argv);
argv++;
}
printk("%s",str);
vfree(str);
}

#endif
#ifdef CONFIG_PPC
printk(KERN_INFO "pre_handler: p->addr = 0x%p, nip = 0x%lx,"
" msr = 0x%lx\n",
p->addr, regs->nip, regs->msr);
#endif
#ifdef CONFIG_MIPS
printk(KERN_INFO "pre_handler: p->addr = 0x%p, epc = 0x%lx,"
" status = 0x%lx\n",
p->addr, regs->cp0_epc, regs->cp0_status);
#endif

/* A dump_stack() here will give a stack backtrace */
return 0;
}

/* kprobe post_handler: called after the probed instruction is executed */
static void handler_post(struct kprobe *p, struct pt_regs *regs,
unsigned long flags)
{
#ifdef CONFIG_X86
printk(KERN_INFO "post_handler: p->addr = 0x%p, flags = 0x%lx,pid=%d,comm=%s,name=%s\n",
p->addr, regs->flags,current->pid,current->comm,(char *)regs->di);
#endif
#ifdef CONFIG_PPC
printk(KERN_INFO "post_handler: p->addr = 0x%p, msr = 0x%lx\n",
p->addr, regs->msr);
#endif
#ifdef CONFIG_MIPS
printk(KERN_INFO "post_handler: p->addr = 0x%p, status = 0x%lx\n",
p->addr, regs->cp0_status);
#endif
}

/*
* fault_handler: this is called if an exception is generated for any
* instruction within the pre- or post-handler, or when Kprobes
* single-steps the probed instruction.
*/
static int handler_fault(struct kprobe *p, struct pt_regs *regs, int trapnr)
{
printk(KERN_INFO "fault_handler: p->addr = 0x%p, trap #%dn",
p->addr, trapnr);
/* Return 0 because we don't handle the fault. */
return 0;
}

static int __init kprobe_init(void)
{
int ret;
kp.pre_handler = handler_pre;
kp.post_handler = handler_post;
kp.fault_handler = handler_fault;

ret = register_kprobe(&kp);
if (ret < 0) {
printk(KERN_INFO "register_kprobe failed, returned %d\n", ret);
return ret;
}
printk(KERN_INFO "Planted kprobe at %p\n", kp.addr);
return 0;
}

static void __exit kprobe_exit(void)
{
unregister_kprobe(&kp);
printk(KERN_INFO "kprobe at %p unregistered\n", kp.addr);
}

module_init(kprobe_init)
module_exit(kprobe_exit)
MODULE_LICENSE("GPL");