chkaddr
chkaddr(ctx->header_size, ddir->certs.virtual_address,
chkaddr(0, 0, sizeof(*mz));
chkaddr(cursor, mz->peaddr, sizeof(*pe));
chkaddr(0, cursor, sizeof(pe32->magic));
chkaddr(0, cursor, sizeof(*pe32));
chkaddr(0, cursor, sizeof(*pe64));