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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 ## 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 * Non-blocking design, preventing misbehaving bytecode from stalling the host
* No assumptions about host IO capabilities (no stdio) * No assumptions about host IO capabilities (no stdio)
* Simple, opinionated execution model * 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 * 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. 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. 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 ## License
This project is licensed under the MIT License. Feel free to use in research, products and embedded devices. This project is licensed under the MIT License. Feel free to use in research, products and embedded devices.