ID Number: Q39374
5.10 | 5.10
MS-DOS | OS/2
buglist5.10 buglist5.10a fixlist6.00
Summary:
SYMPTOMS
When the /LA option is used to show the instructions generated for
the RET instruction, where the RET statment has a label on the same
line and is contained in a PROC that has a USES clause, and/or
parameters, the listing shows the original source line, including
the label, after the POP instructions which are inserted by MASM.
Running the program under CodeView, checking the object code
generated for jumps, and checking the value of the label on the RET
in the symbol listing at the end of the program all confirm that
MASM is producing correct code. It is just the listing that is
incorrect.
RESOLUTION
To produce a correct listing, change the code so that the label and
the RET are not on the same line of source. In other words, change
JUMPHERE: RET
to the following:
JUMPHERE:
RET
and the statement will appear in the correct location in the
listing file.
STATUS
Microsoft has confirmed this to be a problem in MASM version 5.10.
This problem was corrected in MASM version 6.00.
More Information:
The sample code below illustrates the problem. Note: The the first
three lines are necessary for using the "USES" directive.
Sample Code:
------------
; Assemble options needed: none
dosseg
.model small,c
.code
foo proc uses si di bp
jz there
there: ret
foo endp
end
........................................................................
; Incorrect listing file
1 dosseg
2 .model small,c
3 assume cs:@code,ds:@data,ss:@data
4 .code
5 0000 _TEXT segment 'CODE'
6 0000 foo proc uses si di bp
7 0000 56 push SI
8 0001 57 push DI
9 0002 55 push BP
10 0003 74 00 jz there
11 0005 5D pop BP
12 0006 5F pop DI
13 0007 5E pop SI
14 0008 C3 there: ret
15 0009 foo endp
16 end
17 0009 @CurSeg ends