.define _dup
.extern _dup
.text
_dup:
enter[], 0
movd 8(fp),tos
movd 8(fp),tos
movd 41,tos
jsr @.mon
cmpqd 0,tos
beq I0011
movd tos,r7
movd r7,@_errno
movd -1,tos
I0011:
movd tos,r7
movd r7,r4
exit []
ret 0