You got the arguments backward. SPARC uses the proper order (source,dest) So it would be something like: ld [%l0],%o0 ; Load whatever is pointed

You got the arguments backward. SPARC uses the proper order (source,dest) So it would be something like: ld [%l0],%o0 ; Load whatever is pointed to by %l0 into %o0 call some_function ; Stores the old pc in %o7 ; Result is now in %o0 some_function: save ; Move the register window ; The argument is now in %i0 ld %i0,%l0 ; This does not overwrite the caller's l0 ret ; Return, essentially a jump to %i7 restore ; Called due to delay slot, restores the window