/ C library -- link / error = link(old-file, new-file); / .globl _link, cerror _link: mov r5,-(sp) mov sp,r5 mov 4(r5),0f mov 6(r5),0f+2 sys 0; 9f bec 1f jmp cerror 1: clr r0 mov (sp)+,r5 rts pc .data 9: sys link; 0:..; ..