hello world in RISC-V / bare-metal Rust.
Required qemu-system-riscv64 and target "riscv64imac-unknown-none-elf".
$ rustup target add riscv64imac-unknown-none-elf
$ cargo r
tomoyuki-nakabayashi/riscv-rust-hello
light4/riscv-baremetal-rust-helloworld: Rust riscv-64gc baremetal example
qemu/hw/riscv/sifive_u.c