Microsoft KB Archive/85509

= FIX: ORG Calculated from Label May Fail in 6.0a/6.0b =

Article ID: 85509

Article Last Modified on 10/16/2003

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APPLIES TO


 * Microsoft Macro Assembler 6.0a
 * Microsoft Macro Assembler 6.0b

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This article was previously published under Q85509



SYMPTOMS
In Microsoft Macro Assembler (MASM) versions 6.0a and 6.0b, if the expression for an ORG directive is calculated from a label, the ORG directive will not give the correct results. The origin set by the ORG directive will be off by the value of the current location counter ($) prior to the ORG directive.



RESOLUTION
The sample code below demonstrates a macro that can be used to correct the behavior of ORG. This macro should be used only if the expression being supplied to ORG was calculated using a label. If the expression being supplied to ORG was not calculated using any labels, the ORG directive should work correctly.

This macro works correctly only under MASM versions 6.0a and 6.0b.



STATUS
Microsoft has confirmed this to be a problem in MASM versions 6.0a, and 6.0b. This problem was corrected in MASM for MS-DOS version 6.1.



Sample Code
; Assemble options needed: none

ORGFIX MACRO arg1            ; This macro can be used ORG (arg1- ($- @CurSeg))  ; whenever the origin you are ENDM                         ; trying to set contains a LABEL ; or $ as part of the expression. .MODEL small .STACK 4096

.CODE start LABEL BYTE .startup .exit 0 finish LABEL BYTE

ORG ((finish- start)+ 10h)   ; This will incorrectly set tst1 LABEL BYTE              ; the origin.

ORGFIX ((finish- start)+ 10h) ; This will correctly set tst2 LABEL BYTE              ; the origin.

DB 'hello' END

Additional query words: 6.00a 6.00b buglist6.00a buglist6.00b fixlist6.10

Keywords: kbfix KB85509

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