SEGMENTS Statement

Syntax:

SEGMENTS
         segmentdefinitions

This statement defines the attributes of one or more segments in the application or library on a segment-by-segment basis. The attributes specified by this statement override defaults set in CODE and DATA statements.

The SEGMENTS keyword marks the beginning of the segment definitions. This keyword can be followed by one or more segment definitions, each on a separate line (limited by the number set by the LINK386 /SE option, or 128 if the option is not used). See Set Maximum Number of Segments (/SE).

Segment-Definition Syntax

['] segmentname ['] [CLASS 'classname'][attribute...]

Each segment definition begins with <segmentname>, optionally enclosed in single quotation marks ('). The quotation marks are required if <segmentname> conflicts with a module definition keyword, such as CODE or DATA.

The CLASS keyword specifies the class of the segment. Single quotation marks (') are required for <classname>. If you do not use the CLASS argument, LINK386 assumes that the class is CODE.

One or more attributes can follow. The default attribute is listed last.

PRELOAD or LOADONCALL

Determines when segment is loaded

Note: OS/2 s.x ignores the preload attribute.

READONLY or READWRITE
Sets read/write access
EXECUTEONLY or EXECUTEREAD
Sets read/execute status
IOPL or NOIOPL
Sets I/O privilege
CONFORMING or NONCONFORMING
Determines conformance
MIXED1632
Specify Mixed 16 and 32-Bit Segments
ALIAS
Specify that segment is aliased
SHARED or NONSHARED
Specify that segment is shared

Attribute Rules

• Only one attribute from each pair appears. If you specify neither attribute from a pair, LINK386 supplies the default (listed second in each pair above).

• Attributes can appear in any order.

Example

SEGMENTS  cseg1 CLASS 'mycode' IOPL
  cseg2 EXECUTEONLY PRELOAD CONFORMING
  dseg CLASS 'data' LOADONCALL READONLY

This example specifies segments named cseg1, cseg2, and dseg. The first segment is assigned class mycode and the second is assigned CODE by default. Each segment is given different attributes.

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