_REG_G1
uc.uc_mcontext.__gregs[_REG_G1] = sc->sc_g1;
r[_REG_G1] = tf->tf_global[1];
tf->tf_global[1] = r[_REG_G1];
gr[_REG_G1] = tf->tf_global[1];
tf->tf_global[1] = (uint64_t)gr[_REG_G1];
gr[_REG_G1] = tf->tf_global[1];
tf->tf_global[1] = (uint64_t)gr[_REG_G1];