Low-level Functionality

Procedure current-continuation-structure (current-continuation-structure): Returns a transparent representation of the current continuation: a vector representing the innermost continuation frame. A field in the frame points to the parent frame, and so on.
Procedure make-trampoline (make-trampoline procedure): Returns an environment-less procedure that takes any number of arguments and tail-calls procedure with those arguments.

It is not possible to create a procedure with a shorter procedure structure than that of a trampoline. That fact may be relied on: a trampoline can be patched into any other procedure.
Procedure peek-bytes (peek-bytes address buffer k): Read k bytes from memory starting at address address and placing them in the bytevector buffer starting at index 0.
Procedure poke-bytes (poke-bytes address buffer k): Write k bytes from bytevector buffer starting at index 0 to memory starting at address address.
Procedure syscall (syscall code obj1 ...): Make a call on the Larceny run-time system function identified by code with arguments obj1 .... Returns what is returned by the system function.