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iAPX
432
Interface
Processor
Architecture
Reference Manual
A
context
object
is
represented
by a
context
access
segment and an
associated
context
data
segment.
Context Access Segments
Diagranmatically,
a
context
access
segment
is
structured
as
shown
belCM.
context
access
=
=
entry
1
1----------------1
8 domain
AD
-1--->
domain
of
definition
1----------------1
AS
AD
-1--->
entry
access
segment 3
1----------------1
AS
AD
-1--->
entry
access
segment 2
1----------------1
1
AS
AD
-1--->
entry
access
segment I
1----------------1
context
AD
-1--->
context
1----------------1
!
AD
-1--->
nessage
1----------------1
!
AD
-1--->
reserved
1----------------1
AD
-1--->
reserved
1----------------1
segment
--->
0
1
data
seg.
AD
-1--->
context
data
segment
1----------------1
The
context
access
segment,
context
data
segment, and domain
access
descr
iptors
in
the
context
must
be
created
without
delete
rights.
The
entry
access
segment
entries
never bear
delete
rights.
The
base
rights
field
of
a
context
access
segment
access
descriptor
is
interpreted
in
the
same
manner
as
for
all
objects
of
base type
access
segment.
The
system
rights
field
of
a
context
access
segment
access
descriptor
is
uninterpreted.
Context Data Segments
The
only
processor
interpreted
field
in
the
context
data
segment
is
the
process
status
field
which
contains
a combination
of
process
and
context
status.
The
form and
interpretation
of
this
field
are
described
in
the
process
data
segment
section.
The
base
rights
field
of
a
context
data
segment
access
descriptor
is
interpreted
in
the
same
manner
as
for
all
objects
of
base
type
data
segment.
The
system
rights
field
of
a
context
data
segment
access
descriptor
is
uninterpreted.
A-2