This repo is just the hacked version from the original riscv-tools (from https://github.com/riscv/riscv-tools)
Since the original riscv-tools from https://github.com/riscv/riscv-tools keep updating and may be unstable, the purpose of this repo is to use a reduced version of riscv-tools to make it enough to be used by SI-RISCV/e200_opensource project and keep it stable.