Identifier Mangling Pass

An LLVM pass designed to obfuscate the names of identifiers in LLVM Intermediate Representation (IR) code

Features

• Function Name Mangling: Renames function identifiers with randomly generated strings to replace original names.
• Global Variable Name Mangling: Renames global variable identifiers with randomly generated strings.
• Struct Name Mangling: Renames struct type identifiers with randomly generated strings.

Installation

1. Clone this repository

   git clone https://github.com/Ily455/IM-LLVM-Pass.git

2. Compile the Pass

    mkdir build
    cd build
    cmake ..
    make

Usage

1. Compile your C/C++ code to LLVM IR using Clang

   clang -S -emit-llvm input.c -o input.ll

2. Run the Identifier Mangling Pass on the LLVM IR code using the opt tool.

   opt -load-pass-plugin /path/to/ManglePass.so -passes=manglepass < input.ll > -o output.ll

   This produces bitcode.

    opt -S -load-pass-plugin /path/to/ManglePass.so -passes=manglepass < input.ll > -o output.ll

   This produces readable IR.

3. The output LLVM IR code (output.ll) will have the function names, global variable names, and struct type names mangled with randomly generated strings.

Example & Diff

See example

License

The Identifier Mangling Pass is licensed under the MIT License.