bcmp
int bcmp(const void *s1, const void *s2, size_t len);
if (!bcmp(pad, insn_buff, tsize))
if (bcmp(pad, nops, tsize)) {
return !bcmp(pad, insn_buff, tmpl_size);
extern int bcmp(const void *,const void *,__kernel_size_t);
EXPORT_SYMBOL(bcmp);