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Toby Jaffey 2025-12-08 13:02:00 +00:00
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@ -4,11 +4,11 @@ uvm32 is a minimalist, dependency-free virtual machine sandbox designed for micr
## Features
* Bytecode example apps written in C, Zig and Rust
* Bytecode example apps written in C, Zig, Rust and assembly
* Non-blocking design, preventing misbehaving bytecode from stalling the host
* No assumptions about host IO capabilities (no stdio)
* Simple, opinionated execution model
* Safe minimalistic FFI
* Safe minimally typed FFI
* Small enough for "if this then that" scripts/plugins, capable enough for much more
Although based on a fully fledged CPU emulator, uvm32 is intended for executing custom script like logic, not for simulating hardware.
@ -202,6 +202,13 @@ int main(int argc, char *argv[]) {
The uvm32 memory size is set at compile time with `-DUVM32_MEMORY_SIZE=X` (in bytes). A memory of 512 bytes will be sufficient for trivial programs.
## Debugging
The `Makefile` in `apps` builds a docker container with a RISC-V toolchain. This can be used to disassemble with:
docker run -v `pwd`:/data -w /data --rm riscv-dev riscv64-unknown-elf-objdump -d -f hello-asm.elf
docker run -v `pwd`:/data -w /data --rm riscv-dev riscv64-unknown-elf-objdump -S -d -b binary -m riscv:rv32 -D -M no-aliases -f hello-asm.bin
## License
This project is licensed under the MIT License. Feel free to use in research, products and embedded devices.