Is there any support for export label offset or variables?

[nyaoouo]

i am working on some inline hook code like

jmp qword ptr [rip];
dq 0x7ffff8000;

but it seems not directly support variable in keystone

i also want to try something like

jmp qword ptr [rip];
DataHere:;
nop;nop;nop;nop;nop;nop;nop;nop;

but i don't find api to get label offsets for manually replace data

Is there any workaround for this?