FIX: MASM Generates a _TEXT Segment in Far Code Models (79285)
The information in this article applies to:
- Microsoft Macro Assembler (MASM) 6.0
- Microsoft Macro Assembler (MASM) 6.0a
- Microsoft Macro Assembler (MASM) 6.0b
This article was previously published under Q79285 SYMPTOMS
When the assembly language module of a mixed-language program is
placed in an overlay, the program hangs at startup. If the assembly
module is placed in the root, the problem disappears. This problem
occurs only when using the .MODEL directive in the Microsoft Macro
Assembler (MASM) versions 6.0, 6.0a, or 6.0b.
CAUSE
MASM 6.0 generates a zero length _TEXT segment from source files that
specify .MODEL medium, .MODEL large, or .MODEL huge. The startup code
for Microsoft's high level languages is also declared in the _TEXT
segment. The linker combines segments with the same name. If the
assembly module is overlayed, the startup code is pulled into the
overlay because the _TEXT segments will be combined. This means that
the startup code is not available when the program starts executing,
which causes the program to crash.
RESOLUTION
Work around this problem by removing the .MODEL directive and using
full segment directives instead in any module that will be placed in
an overlay.
STATUS
Microsoft has confirmed this to be a problem in MASM version 6.0,
6.0a, and 6.0b. This problem was corrected in MASM for MS-DOS version
6.1.
| Modification Type: | Minor | Last Reviewed: | 11/15/2003 |
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| Keywords: | kbfix KB79285 |
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