Assembly-based modification tool for my CFI implementation. This work is part of my bachelor thesis, begun in November 2021, finished in April 2022.
In my bachelor thesis I developed and implemented a coarse-grained CFI check for ARMv7-M based embedded systems. The implementation provided two ways for integrating the changes into an application by instrumentalizing the application code. This is the actual tool implementing one of these ways.
The tool expects that the build system / toolchain does not compile + assemble + link in one step. Instead, the build script should be adjusted so that the compiler compiles the source code and just emits the generated assembly code. Then, cfi_asm_mod is called to perform the required changes. Afterwards, the assembler can be used to assemble the modified code. When all desired source units were modified, the linker can finally link the application.
Of course, you can always contact me if you have any questions or hints regarding this tool or in general my bachelor thesis. You can find my contact information in my profile. All hints and questions regarding the purpose of this tool and its implementation, or regarding my bachelor thesis are welcome. The same applies to the Rust code, as I am still learning heavily writing code in Rust at the time of writing this.