Is there a way to copy and restore the callstack in a Go program?

Question

I am trying to implement continuations with unlimited extent in a Go program (for those curious, I am writing a scheme interpreter). One way to do this is to copy the callstack to the heap so that it can be restored later. Go's garbage collector still needs to know about all the pointers in the copy of the stack. Is there a way to do this in a Go program? Note that I am willing to write code in C or assembly, compatibly with the Go toolchain, if need be.