fetch_disp
sig = fetch_disp(frame, insn, 1, &ea->ea_offset);
sig = fetch_disp(frame, insn, 1,
sig = fetch_disp(frame, insn, 2,
sig = fetch_disp(frame, insn, 1,
sig = fetch_disp(frame, insn, bd_size, &basedisp);
sig = fetch_disp(frame, insn, od_size, &outerdisp);
static int fetch_disp(struct frame *, struct instruction *, int, int *);