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8086
Object
Module
Formats
Version
4.0
(Informal
Discussion)
The
FRAME
NUMBER
is
present
iff
both
the
SEGMENT
INDEX
and
GROUP
INDEX
are
zero.
A
non-zero
GROUP
INDEX
selects
some
qroup1
this
group
is
taken
as
the
-frame
of
reference-
for
references
to
all
public
symbols
defined
in
this
record,
e.q.,
LINK-86
and
LOCATE-86
will
perform
the
following
actions:
(1)
Any
fixup
of
the
form:
TARGET:
El
(P)
FRAME:
TARGET
(where
.pM
is
a
public
symbol
in
this
PUBDEF
record)
will
be
converted
by
LINK-86
to
a
fixup
of
the
form:
TARGET:
SI(L),d
FRAME:
GI
(G)
where
M
SI
(L)"
and
"d"
are
provided
by
the
SEGMENT
I,NDEX
and
PUBLIC OFFSET
fields.
(The
Mnormalft
action
would
have
the
frame
specifier
in
the
new
fixup
be
the
same
as
in
the
old
fixup,
viz.:
FRAME:
TARGET.)
(2)
When
the
value
of
a
public
symbol,
as
defined
by
the
SEGMENT
INDEX. PUBLIC
OFFSET,
and
(optionally)
FRAME
NUMBER
fields,
is
converted
to
a
{base,offset}
pair,
the
base
part
will
be
taken
as
the
base
of
the
indicated
group.
(If
a
non-neqative
16-
bit
offset
cannot
then
complete
the
definition
of
the
public
symbol's
value,
an
error
will
occur.)
A
GROUP
INDEX
of
zero
selects
no
qroup.
LINK-S6
will
not
alter
the
FRAME
specification
of
fixups
referencing
the
symbol,
and
LOCATE-86
will
take,
as
the
base
part
of
the
absolute
value
of
the
public
symbol,
the
canonic
frame
of
the
segment
(either
LSEG
or
PSEG)
determined
by
the
SEG~ENT
INDEX
field.
(End
of
Informal
Discussion)
puaLIC
NAME
The
PUBLIC
NAME
field
qives
the
name
of
the
object
whose
location
in
MAS
is
to
be
made
available
to
other
modules.
The
name
must
contain
1
or
more
characters.
(Note)
R&L's
only
cdnstraint
upon
the
characters
in
names
is
that
they
lie
within
the
range
20H
(space)
throuqh
7EH"
(tilde)
inclusive.
Other
characters
may
be
used,
but
may
produce
awkward
results
when
output
to
listing
devices,
etc.
However,
translators
may
proscribe
the
admissible
character
set
more
strictly.
(End
of
Note)
PUBLIC OFFSET
The
PUBLIC OFFSET
field
is
a
l~-bit
value,
which
is
either
the
offset
of
the
Public
Symbol
with
respect
to
an
LSEG
(if
SEG~EN'r
INDEX
>
0),
or
the
offset
of
the
Public
Symbol
with
respect
to
the
specified
FRA~E
(if
SEGMENT
INDEX
=
~).
as