Lab 1 of MIT 6.828/6.S081 Fall 2019 is Unix utilities: using xv6 system calls to implement tools such as sleep, pingpong, primes, find, and xargs. This post explains the approach behind each program in detail, along with how a system call flows through xv6.

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This post walks through setting up the lab environment for MIT 6.828/6.S081 Fall 2019 in detail, covering the RISC-V toolchain, QEMU, and xv6. It uses macOS as the example, and the same steps apply to Linux.

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