040000 tree 918d271549bc0dc20fee49637f2ea2c08cc83fee	arm-trusted-firmware
040000 tree b90fc7ffd7b9b9e673571fa1e5f13e2e470de32a	linux
040000 tree 42a24efe6b2e256eeab53b2c03626a27a40e5dc2	musl