Article: Q26796
Product(s): Microsoft Macro Assembler
Version(s): 5.0,5.1,5.1a
Operating System(s):
Keyword(s):
Last Modified: 06-MAY-2001
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The information in this article applies to:
- Microsoft Macro Assembler (MASM), versions 5.0, 5.1, 5.1a
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SYMPTOMS
========
The expression 'PUSH DWORD PTR OFFSET alabel' causes the Microsoft Macro
Assember (MASM) versions 5.0, 5.1, and 5.1a to generate the error message:
error A2027: Operand expected
RESOLUTION
==========
The line 'PUSH DWORD PTR (OFFSET alabel)' works correctly. Since OFFSET is a
unary operator, it should not require parentheses.
STATUS
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Microsoft has confirmed this to be a problem in MASM versions 5.0, 5.1, and
5.1a. This problem was corrected in MASM version 6.0.
MORE INFORMATION
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It is important to note that the operating system that your program is running
on must be capable of supporting 32 bit code segments to be able to run code in
32 bit segments. Most PC based operating systems such as MS-DOS 5.0, Windows
3.0, and OS/2 1.x do not provide support for 32 bit code segments. Newer
operating systems and DOS extender packages may provide this support.
Sample Code
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; Assemble options needed: none
.MODEL small
.386
.STACK 1024
seg32 SEGMENT USE32
a32label DW 4321h
seg32 ENDS
.CODE
start:
;push DWORD PTR (OFFSET a32label) ;This is the MASM 5.0,
;5.1, and 5.1a workaround
push DWORD PTR OFFSET a32label
mov ax, 4C00h
int 21h
END start
Additional query words: 5.00 5.10 5.10a buglist5.00 buglist5.10 buglist5.10a fixlist6.00
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Keywords :
Technology : kbMASMsearch kbAudDeveloper kbMASM510 kbMASM500 kbMASM510a
Version : :5.0,5.1,5.1a
Solution Type : kbfix
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