/ C library -- chown / error = chown(string, owner); .globl _chown, retrn, cerror _chown: 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 jmp retrn .data 9: sys chown; 0:..; ..