PRB: Incorrect Debug Information in 32-bit Object Module
Article ID: 117796
Article Last Modified on 10/14/2003
APPLIES TO
- Microsoft Macro Assembler 6.1 Standard Edition
This article was previously published under Q117796
SYMPTOMS
When you step through assembly source code with a debugger, instructions do
not seem to execute properly. Switching to mixed assembly and source shows
the source code does not match up with the disassembled code.
CAUSE
When you debug a Windows NT application containing an Object Module Format
(OMF) object module created with Microsoft Macro Assembler (MASM), version
6.1, the source line number debug information is incorrect when converted
to Common Object File Format (COFF) by a 32-bit linker (such as the linker
shipped with Microsoft Visual C++, 32-bit edition). This results in lines
in the source file being incorrectly associated with points in the
executable file.
RESOLUTION
Assemble the assembly source file using the /coff switch, which will cause
MASM to generate a COFF object module.
MORE INFORMATION
COFF is the preferred object file format for Windows NT, and you should
always use the /coff switch when assembling source files for use in the
Windows NT operating system.
Additional query words: 6.10a 6.11 6.11a
Keywords: kbprb KB117796