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A simple RISC-V emulator
9 commits 1 branch 0 tags 285 KiB
C++ 44%
C 35.2%
Python 16.3%
Nix 2.9%
CMake 0.8%
Other 0.7%
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Konstantin Nazarov 90a8c9c378
Make the C-compiled program actually work
2024-12-07 01:19:22 +00:00
example Make the C-compiled program actually work 2024-12-07 01:19:22 +00:00
src Make the C-compiled program actually work 2024-12-07 01:19:22 +00:00
.gitignore Make the C-compiled program actually work 2024-12-07 01:19:22 +00:00
CMakeLists.txt Implement basic opcodes (not yet all of them) 2024-12-06 21:27:44 +00:00
flake.lock Initial commit 2024-12-06 19:44:09 +00:00
flake.nix Add an example program in C 2024-12-06 22:40:52 +00:00
README.md Make the C-compiled program actually work 2024-12-07 01:19:22 +00:00
rve.nix Add an example program in C 2024-12-06 22:40:52 +00:00

README.md

A simple RISC-V emulator

This is a toy emulator for RISC-V, made for educational purposes. The goal is to have a base rv32i instruction set (the bare minimum) plus a M-extension for division and multiplication. In theory, it should be enough to execute simple C programs compiled with GCC and sprinkled with a few linker scripts. Of course, no libc because there's no OS.

Compiling and running

You'd need nix. Install it and run:

nix develop

eval "$configurePhase"
ninja

As a result you should get an executable called rve

Cross-toolchain and an example program in C

There is an example program which you can compile. It requires some custom toolchain so currently not built with CMake. To compile it:

cd example
make

As a result, you'll get an example.raw binary. To execute it:

./rve ../example/example.raw

The expected output of the example program is 269.