FIX: Incorrect RET Generated for PROC when EPILOGUE:NONELast reviewed: September 16, 1997Article ID: Q102432 |
6.00 6.00a 6.00b 6.10 6.10a | 6.00 6.00a 6.00b
MS-DOS | OS/2kbtool kbfixlist kbbuglist The information in this article applies to:
SYMPTOMSWhen Microsoft Macro Assembler (MASM) processes source code for an application, it may generate the incorrect form for a RET instruction in a PROC. Specifically, the assembler generates a RET 4 instruction instead of a RET instruction when the source code contains a RET instruction.
CAUSEThe source code uses the OPTION EPILOGUE statement multiple times to set the EPILOGUE macro to NONE.
RESOLUTIONModify the source code to specify RET 0. The assembler translates this expression into a RET instruction.
STATUSMicrosoft has confirmed this to be a problem in MASM versions 6.0, 6.0a, 6.0b, 6.1, and 6.1a. This problem was corrected in MASM for MS-DOS version 6.11.
MORE INFORMATIONThe following code example demonstrates this problem:
Sample Code; Assembler options needed: /c /Fl /Sa .MODEL small, Pascal _text SEGMENT OPTION EPILOGUE:NONE p0 PROC parm1:DWORD ret ; This correctly generates a RETp0 ENDP OPTION EPILOGUE:EpilogueDef p1 PROC parm1:DWORD ret ; This correctly generates a RET 4p1 ENDP OPTION EPILOGUE:NONE p2 PROC parm1:DWORD ret ; This incorrectly generates a RET 4p2 ENDP _text ENDS END
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Additional reference words: 6.00 6.00a 6.00b 6.10 6.10a buglist6.00a
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