KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q76163: Line Numbers in .MAP File Do Not Relate to Listing File

Article: Q76163
Product(s): Microsoft Macro Assembler
Version(s): MS-DOS:5.0,5.10,5.10a
Operating System(s): 
Keyword(s): 
Last Modified: 06-MAY-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Macro Assembler (MASM), versions 5.0, 5.10, 5.10a 
-------------------------------------------------------------------------------

SUMMARY
=======

When using the Microsoft Macro Assembler (MASM) version 5.0, 5.1, or 5.1a and
generating a cross-reference file, the listing file generated will contain line
numbers. These line numbers do not relate to the line numbers listed in the .MAP
file when specifying the /LINE linker option.

The line number information generated in the .MAP file with the /LINE option
relates to the source file and not to the listing file. Therefore, relying on
the .MAP file to give information relating to assembler-generated listing file
is not valid because listing files contain added information.

MORE INFORMATION
================

The sample code below contains two NOP statements to show executable code lines.
The .MAP file contains line number information corresponding to the source
file's executable lines. This is the intended use of the line number information
generated by the .MAP file. It is not intended for these line numbers to relate
to the lines of the listing file.

  TEST.ASM:

  ; Assemble options needed: /Zd /c /l
  ; Link options needed: /L

  .MODEL SMALL
  .STACK 100H
  .CODE
  start:
     nop
     nop
  END start

  TEST.MAP:

   Start  Stop   Length Name                   Class
   00000H 00001H 00002H _TEXT                  CODE
   00002H 00002H 00000H _DATA                  DATA
   00010H 0010FH 00100H STACK                  STACK

   Origin   Group
   0000:0   DGROUP

    Address         Publics by Name

    Address         Publics by Value

    Line numbers for TEST.OBJ(test.asm) segment _TEXT

       5 0000:0000     6 0000:0001

    Program entry point at 0000:0000

Additional query words: kbinf 5.00 5.10 5.10a

======================================================================
Keywords          :  
Technology        : kbMASMsearch kbAudDeveloper kbMASM500
Version           : MS-DOS:5.0,5.10,5.10a

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.