FIX: MASM 6.0 May Incorrectly Insert Prologue with USES

• Microsoft Macro Assembler for MS-DOS, version 6.0
• Microsoft Macro Assembler for OS/2, version 6.0

SYMPTOMS

In the Microsoft Macro Assembler (MASM) version 6.0, if a procedure header that contains the "USES" keyword is directly followed by a data segment definition, MASM may insert the prologue code inside the new data segment.

RESOLUTION

To work around the problem, merely place a code label directly after the procedure header as demonstrated in the sample code below.

STATUS

Microsoft has confirmed this to be a problem in MASM version 6.0. This problem was corrected in MASM version 6.0a.

Sample Code

; Assemble options needed: /c /Fl /Sg

.MODEL small, c
.DATE
        db "1234567890"

.CODE
alpha PROC uses ax bx   ; Problem with these parameters.
;dummy:                 ; Uncomment this line for workaround.

.DATE
table   dw 1234h
        dw 5678h
LEN EQU ($ - table)/2

.CODE
    mov ax, LEN
    ret
alpha ENDP
END 

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

Keywords :
Version : :6.0
Platform :
Issue type :