duna

An assembly simulator built in Rust.

See also

• Venus
• SPIM

Current functionality

• Run by CLI with cargo run <INPUT_FILE>
• RISC-V
  • Supports most of RV32IM and RV64IM
  • Supports a few ecalls
• MIPS
  • WIP

Roadmap

RISC-V

• Finish multiplication extension
• Figure out which CSRs to support

OS/Memory

• Fix page table/TLB lol
• Instruction decoding + instruction fetches
• Distinguish between IMEM/DMEM
• Interrupts?
• Kernel memory?
• Fence instructions
• Configurable cache hierarchy, store buffers

Interface

• Standard library functions
• CLI configuration
• Support assembler relocation functions
• Display regfile, memory, and cache info
• Ability to poke values in registers, memory, etc. (add sources/causes to diff structs?)
• Provide debugger support a la GDB, possibly valgrind-like tools as well?
• Implement peephole optimizations + visualizations

Niceties

• Add hints/warnings
• Run riscv compliance tests

Other ISAs?

• MIPS 32/64bit? whatever they're called?
• Atmel AVR
• ARM
• x86-64
• wasm
• some LLVM IR