SEGMENT

Defines a program segment called name having segment attributes

Syntax

name SEGMENT ⟦READONLY⟧ ⟦align⟧ ⟦combine⟧ ⟦use⟧ ⟦characteristics⟧ ALIAS(string) ⟦'class'⟧
statements
name ENDS

Parameters

align
The range of memory addresses from which a starting address for the segment can be selected. The alignment type can be any one of the following:

Align Type	Starting Address
BYTE	Next available byte address.
WORD	Next available word address (2 bytes per word).
DWORD	Next available double word address (4 bytes per double word).
PARA	Next available paragraph address (16 bytes per paragraph).
PAGE	Next available page address (256 bytes per page).
ALIGN(n)	Next available nth byte address. See Remarks section for more information.

If this parameter is not specified, PARA is used by default.

combine (32-bit MASM only)
PUBLIC, STACK, COMMON, MEMORY, ATaddress, PRIVATE

use (32-bit MASM only)
USE16, USE32, FLAT

characteristics
INFO, READ, WRITE, EXECUTE, SHARED, NOPAGE, NOCACHE, and DISCARD

These are supported for COFF only and correspond to the COFF section characteristics of similar name (for example, SHARED corresponds to IMAGE_SCN_MEM_SHARED). READ sets the IMAGE_SCN_MEM_READ flag. The obsolete READONLY flag caused the section to clear the IMG_SCN_MEM_WRITE flag. If any characteristics are set, the default characteristics are not used and only the programmer-specified flags are in effect.

string
This string is used as the section name in the emitted COFF object. Creates multiple sections with the same external name, with distinct MASM segment names.

Not supported with /omf.

class
Designates how segments should be combined and ordered in the assembled file. Typical values are, 'DATA', 'CODE', 'CONST' and 'STACK'

Remarks

For ALIGN(n), n may be any power of 2 from 1 to 8192; not supported with /omf.

See also

Directives reference
MASM BNF Grammar