xv6 for RISC-V

Xv6 for RISC-V。xv6 是 Dennis Ritchie 和 Ken Thompson 的 Unix Version 6 (v6) 的重新实现。xv6 大致沿用了 v6 的结构和风格、但它是使用 ANSI C 语言为现代 RISC-V 多处理器实现的。『Xv6 for RISC-V. xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix Version 6 (v6). xv6 loosely follows the structure and style of v6, but is implemented for a modern RISC-V multiprocessor using ANSI C.』