Can data embed in the instruction stream ?

[wuxi]

Hi:
I am wondered whether a binary, especially the one produced by a 
compiler, can have *data* embedded in its instruction stream.

I believe there can be but is there a real example ?

jump table may not be the correct example, as every time the compiler 
generates a jump table in assembly file, it will put a .rodata directive 
before generating the data in jump table. So it actually residents in 
rodata section, not text.

I want to have a full description of the example, or even better, a 
binary file illustrating the example.

Thanks !