c_to_vm

A C compiler that targets a VM, written is Rust

This project has 3 components:

• Virtual Machine:

  An emulation of a CPU that has 8 regiters, can execute instructions with 17 different opcodes, use memory, and perform IO with memory mapped registers.

• C compiler:

  A C compiler that targets the VM's instructions set.

  list of compiler features

  • Evaluate expressions
  • Local & global variables
  • Flow control: if/else & loops
  • Scopes
  • Functions
  • Arrays & structs
  • Pointers
  • C strings

  Includes a linker and a basic preprocessor.

  Lexing & Parsing is performed using pycparser.

• Operating System:

  Can load programs to memory, has an assembler and a assembly-level debugger. Offers a minimal libc with print functions and malloc & free implementation.

Usage:

• To run the tests: ./run_tests
• To compile & run a program: cargo run run <main_source_file> <optionally other files to link with>
• To compile & debug a program: cargo run debug <main_source_file> <optionally other files to link with>

TODO list:

• Improve preprocessor: Add #define, #ifdef, macros.
• Add typedef, check type validity at compile time.
• Ultimately the goal is to compile gnu libc