What is the disassembly process?

What is the disassembly process?

Abstract. The disassembly process is an essential activity performed on out-of-service products for remanufacturing. A disassembly process includes many subprocesses, such as separation, cleaning, repair, replacement, and inspection.

Why do we need to disassemble computer?

A device may be disassembled to help determine a problem, to replace a part, or take the parts and use them in another device or sell them individually. ... For example, if a computer has a bad processor, you may need to open the computer case, disassemble the heat sink and processor, and manually replace it.

Is it safe to take apart a computer?

"People pull all sorts of parts, put in all sorts of parts," Tennis said, "and they're not shocked," explaining that it is unusual for someone to suffer a fatal shock while repairing or taking apart a computer. One would have to work on a component which retains a charge, such as the power supply.

What is the input and output of a disassembler?

A length disassembler, also known as length disassembler engine (LDE), is a tool that, given a sequence of bytes (instructions), outputs the number of bytes taken by the parsed instruction.

What is difference between assembler and disassembler?

An assembler is a computer program that translates human-readable assembly language source code into machine language instructions that can be executed by the computer hardware. ... A disassembler is a computer program that translates machine language instructions into human-readable assembly language source code.

What is decompiler and disassembler?

Decompilation is a type of reverse engineering that does the opposite of what a compiler does. The tool that accomplishes this is called a decompiler. A similar tool, called a disassembler, translates object code into assembler language.

What is the purpose of a decompiler?

A decompiler is a computer program that takes an executable file as input, and attempts to create a high level source file which can be recompiled successfully. It is therefore the opposite of a compiler, which takes a source file and makes an executable.

What is the best decompiler?

Best Java Decompilers

  1. JDProject. JDProject is one of the most frequently used java decompiler offline.It is developed to decompile java 5 or later versions(as of now till java8). ...
  2. Procyon. Procyon is a java decompiler developed by Mike Strobel. ...
  3. Cavaj Java Decompiler. If you are a Windows user, then Cavaj is a good option as a decompiler.

How do you make a decompiler?

The first step of writing a good decompiler is writing a good disassembler. While the details of individual disassemblers can be extremely complex, the general idea is fairly simple. The mapping between assembly and machine code is in theory one-to-one, so a straight-line translation should be feasible.

Can you decompile DLL?

If it's the older Visual Basic (pre-. NET), then the DLL is compiled as what's called p-code and there are a few options for doing some variations on decompiling. ... Such a DLL is compiled to machine language and can only be directly decompiled to assembly language. So, again, it depends on the language used.

How do Decompilers work?

A disassembler takes this binary code and translates it into a text representation. This translation is usually 1-to-1, meaning one instruction is shown as one line of text. This task is complex, but straightforward, the program just needs to know all the different instructions and how they are represented in a binary.

What is ILSpy used for?

ILSpy can be used to decompile or get the high level language code like C# or VB from the assembly provided which in turn can help us to dig into the working of the code without inspecting the IL code. We can download the ILSpy code and binaries from their website.

What is dnSpy tool?

dnSpy is a tool that allows you to manage obfuscated code with a large variety of specific tools at your disposal. Any software engineer got in a situation where you had to decompile specific assemblies to understand the functionality more efficiently.

How do you open a ILSpy?

First, download the binaries from the ILSpy website:

  1. This will download a ZIP file.
  2. Extract the file:
  3. Run the ISpy.exe:
  4. Click to open a file:
  5. Here I have selected an exe compiled from code I previously wrote. You can see we can now see the decompiled code within ILSpy:

How can I edit a DLL file?

Part 2 of 2: Editing DLLs with Hex Editor

  1. Install the Hex Editor. ...
  2. Click File. ...
  3. Select Open. ...
  4. Click Open File…. ...
  5. Find the DLL you want to edit. ...
  6. Select the DLL. ...
  7. Click Open. ...
  8. Edit the DLL's contents.

How do I edit DLL files with dotPeek?

In the latest version of DotPeek you can right click on an assembly in the assembly explorer tree view and click the 'Export To Project' option. This will save it as an accessible Visual Studio solution and you can then make changes, debug in run time and recompile to replace the original DLL.

How do I read a .DLL file?

If you are using Windows 7 or newer, open the folder containing the new DLL file, hold the Shift key and right-click in the folder, and select "Open command window here". The Command Prompt will open directly to that folder. Type regsvr32 dllname . dll and press Enter.

What is the purpose of DLL files?

The use of DLLs helps promote modularization of code, code reuse, efficient memory usage, and reduced disk space. So, the operating system and the programs load faster, run faster, and take less disk space on the computer. When a program uses a DLL, an issue that is called dependency may cause the program not to run.

How DLL files are created?

On the menu bar, choose File > New > Project to open the Create a New Project dialog box. At the top of the dialog, set Language to C++, set Platform to Windows, and set Project type to Library. From the filtered list of project types, select Dynamic-link Library (DLL), and then choose Next.

How can I read DLL files online?

Opening DLL file using Visual Studio Online Open a web browser that you have been constantly using to browse the internet. In the address bar, type https://online.visualstudio.com/login and then press the 'Enter' button in the keyboard. The Visual Studio Online page shall load up.

How do I edit an EXE file?

The .exe file is a windows executable file which is non-editable. But if you want to change its Resources(icon etc.) , then you can use resource hacker tool....Using reverse engineering techniques:

  1. Decompile executable file (EXE).
  2. Edit decompiled code.
  3. Compile edited code into a new executable (EXE)

How do I use a DLL file?

You use the . dll directly, which means using LoadLibrary() to load the . dll into memory and then use GetProcAddress to get a function pointer (basically a memory address in a variable, but you can use it just like a function).

How do I change the code of a .EXE file?

The first thing you need is the source code. Depending on what language that the source code is in you will then need an appropriate editor and compiler designed to work with that language. You can't edit an exe file - you have to go back to the original source to make the changes.