How to use krypoto extension with GNU toolchain

Jan 1, 0001 · 2 min.

How to build scalar cryptography GNU toolchain Link to this heading

Firstly you should prepare the envirmental for build, you can build it on Ubuntu 18.04 LTS or Ubuntu 20.04 LTS

$ lsb_release -a
LSB Version:    core-11.1.0ubuntu2-noarch:security-11.1.0ubuntu2-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.2 LTS
Release:        20.04
Codename:       focal

Additionally, you should install some essential tools for build

apt-get install git gawk texinfo bison flex python expect ninja-build pkg-config libglib2.0-dev

Then clone the riscv-gnu-toolchain repository

git clone https://github.com/riscv/riscv-gnu-toolchain 
cd riscv-gnu-toolchain
git submodule update --init

Add remote with k-ext and checkout your branch with gcc and binutils

cd riscv-gcc
git remote add k https://github.com/WuSiYu/riscv-gcc
git fetch k
git checkout k/riscv-gcc-10.2.0-crypto
cd ../riscv-binutils
git remote add k https://github.com/pz9115/riscv-binutils-gdb.git
git fetch k
git checkout k/riscv-binutils-2.36-k-ext
cd ..

Set configure for k-ext, you can build in rv32 or rv64 with different subsets of k-ext, please check the spec RISC-V Cryptographic Extension Proposals chapter 2 “Implementation Profiles” for further use, here is some examples

test total k-ext with zkn, zkr, zks with rv64

./configure --prefix="/opt/riscv/rv64gck" --with-arch=rv64gc_zbkb_zbkc_zbkx_zknd_zkne_zknh_zkr_zksed_zksh --with-abi=lp64d --with-multilib-generator="rv64gc__zbkb_zbkc_zbkx_zknd_zkne_zknh_zkr_zksed_zksh-lp64d--"

you can use make -j* to make speed up

make report-gcc -j $(nproc)
make report-binutils -j $(nproc)

you can check the test log, the testcases of k-ext we defined in

vi build-gcc-newlib-stage2/gcc/testsuite/gcc/gcc.log
vi build-binutils-newlib/gas/testsuite/gas.log
find riscv-gcc/gcc/testsuite/gcc.target/riscv/ -name Zk*
find riscv-binutils/gas/testsuite/gas/ -name k-ext*

test in rv32:

./configure --prefix="/opt/riscv/rv32gck" --with-arch=rv32gc_zbkb_zbkc_zbkx_zknd_zkne_zknh_zkr_zksed_zksh --with-abi=ilp32d --with-multilib-generator="rv64gc_zbkb_zbkc_zbkx_zknd_zkne_zknh_zkr_zksed_zksh-ilp32d--"
make clean 
make report-gcc -j $(nproc)
make report-binutils-newlib -j $(nproc)