ack/mach/pdp/libsys/dup.s

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ArmAsm
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#include "sys.h"
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.define _dup
.define _dup2
.extern _errno
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_dup2:
mov 2(sp),r0
bis $100,r0
br 1f
_dup:
mov 2(sp),r0
1:
mov 4(sp),r1
sys dup
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bcc 1f
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mov r0,_errno
mov $-1,r0
1:
rts pc