void kdb_show_sampling(void)
{
int i;
int symid;
int *hitcount, *symid_list;
static int init = 0;
static struct kprobe k;
if (init == 0) {
dbg_printf(DL_KDB, "Init sampling...\n");
sampling_init();
sampling_enable();
init++;
k.addr = ktimer_handler;
k.pre_handler = sampling_handler;
k.post_handler = NULL;
kprobe_register(&k);
return;
}
sampling_disable();
sampling_stats(&hitcount, &symid_list);
for (i = 0; i < ksym_total(); i++) {
symid = symid_list[i];
if (hitcount[symid] == 0)
break;
dbg_printf(DL_KDB, "%5d [ %24s ]\n", hitcount[symid],
ksym_id2name(symid));
}
sampling_enable();
}
static int __kretprobe_pre_handler(struct kprobe *kp, uint32_t *stack,
uint32_t *kp_regs)
{
struct kretprobe * rp = (struct kretprobe *) kp;
kprobe_unregister(kp);
rp->backup_addr = kp->addr;
kp->addr = (void *) stack[REG_LR];
kp->pre_handler = rp->handler;
kp->post_handler = __kretprobe_post_handler;
kprobe_register(kp);
return 0;
}
int kretprobe_register(struct kretprobe *rp)
{
rp->kp.pre_handler = __kretprobe_pre_handler;
rp->kp.post_handler = NULL;
return kprobe_register((struct kprobe *) rp);
}
