What does && mean in void *p = &&abc;

Question

I came across a piece of code void *p = &&abc;. What is the significance of && here? I know about rvalue references but I think && used in this context is different. What does && indicate in void *p = &&abc; ?

Answer 1

&& is gcc's extension to get the address of the label defined in the current function.

void *p = &&abc is illegal in standard C99 and C++.

This compiles with g++.