In the previous section, we have seen how to create an EXE file using MASM with VS 2o10. The Visual Studio IDE is inbuilt with a Disassembly option, which is very helpful to detect a run time bug such as buffer overflow in the code via converting the source code file to an assembly code file as follows: The following image shows the assembly code in debug mode which helps us to understand what is happening behind the scenes.Īlthough this section is not relevant to this article, but just for knowledge point view, we can disassemble any C++ file to its corresponding ASM code. We shall cover the advanced debugging of an application in later articles. We can even debug the assembly code by inserting a breaking point as a specific location, and through the Register window in the Debug menu, we can observe all the CPU registers with corresponding flags as follows: When the exe is clicked, a “Hello World!” message box would appear as follows: If the whole configuration is correct, then a test_masm.exe file is created in the Debug folder of the solution. Here, set the directory name where the MASM SDK was installed earlier as follows:įinally, everything is ready and the solution is compiled. Now come to the Microsoft Macro Assembly section from the solution properties which appears the moment when we add an assembly file in solution directory, otherwise it shall be hidden. We can identify the entry point of the ASM file from the. Now, come to System from the Linker and set Windows in the subsystem section as follows:įinally configure the code entry point as the start from the Advanced option in the Linker, which determines the code execution flow. It is not required to generate a manifest file for such manipulation, hence disable it as follows: Next, come to the Input section in the Linker and mention the reference of masm32.lib file as additional dependencies: Here, choose General by expanding Linker and in the Additional Library Directories, insert the path of include, lib and macros directories as follows: Hence, choose project Properties by right clicking it from the solution explorer. Successful execution of an assembly code file with Visual Studio IDE depends on an external library file, which will be available from MASM SDK. The assembly code file is written, but keep patience, this is not ready to compile or execute because some of important project settings are still remaining. Invoke MessageBox, NULL, addr MsgBoxText, addr MsgBoxCaption, MB_OK MsgBoxText db “Hello World!!!Welcome to ASM Programming under CLR”,0 MsgBoxCaption db “Win32 Assembly Programming”,0 Option casemap:none Treat labels as case-sensitive 386 Tells MASM to use Intel 80386 instruction set. Open it and paste the following assembly code, which is responsible for displaying a message box, as follows: Now, a blank text.asm file is added to our test_masm solution. This is the key option which must be enabled in order to edit and compile the native assembly code file.Īs we have stated earlier, VS 2o1o doesn’t provide assembly file templates, however choose a project from the solution explorer and right click to add a text file which will be provided a *.ASM extension as follows: The Build Customization options open up the MASM compiler options which uncheck by default. Once the test_masm of VC++ type solution is created, go to the solution explorer and right click to choose Build Customization option as follows: There is no need to create a sub-directory for this empty solution, so uncheck the corresponding check box as follows: Hence, open Visual Studio and choose an Empty Project of VC++ template type. We shall have to create a VC++ project solution which later is accompanied with an assembly code file. It in fact has an in-built option to compile or run assembly programs. It is very tricky to do such an implementation because Visual Studio 2010 IDE doesn’t offer any explicit templates for writing assembly code like C#, VC++ and VB.NET programming languages. We shall demonstrate assembly programming by creating a simple Windows executable which typically shows “Hello World!” in a message box the moment it is initiated. MASM (Microsoft Macro Assembler) SDK Library.So, the newbies should to have a brief knowledge of these technologies: In this article, we would get an understanding about creating both EXE and DLL using MASM with Visual Studio.
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