add_1mod
EMIT1(add_1mod(0x48, reg));
EMIT1(add_1mod(0x40, reg));
EMIT2(0x65, add_1mod(0x48, dst_reg));
EMIT3(add_1mod(0x48, dst_reg), 0x0F,
EMIT2(add_1mod(0x48, dst_reg), 0xC7);
EMIT1(add_1mod(0x48, BPF_REG_3)); /* cmp rdx,func */
EMIT1(add_1mod(0x48, BPF_REG_3)); /* cmp rdx,func */
b1 = add_1mod(0x48, dst_reg);
EMIT1(add_1mod(0x40, dst_reg));
EMIT2(add_1mod(0x48, dst_reg), add_1reg(0xB8, dst_reg));