xv6

port of xv6 to x86-64
git clone http://frotz.net/git/xv6.git
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README (1588B)


      1 
      2 This is a port of xv6 to the x86-64 platform (from i386), attempting to
      3 be as minimally intrusive as possible (beyond some initial reorganization
      4 of the source code layout and build system).
      5 
      6   "xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix
      7    Version 6 (v6).  xv6 loosely follows the structure and style of v6,
      8    but is implemented for a modern x86-based multiprocessor using ANSI C."
      9 
     10 The original upstream branch (mirror) was pulled from the git repository
     11 https://github.com/mit-pdos/xv6-public
     12 (previously git://pdos.csail.mit.edu/xv6/xv6.git)
     13 
     14 The original project homepage is here:
     15 https://pdos.csail.mit.edu/6.828/2014/xv6.html
     16 (previously http://pdos.csail.mit.edu/6.828/2012/xv6.html)
     17 
     18 The PDF books about the rev7 version of xv6 are checked into the books branch
     19 of this repository for easy access.  They come from the xv6 project's home site.
     20 
     21 The original README remains as README.orig -- renamed to avoid misrepresenting
     22 this working branch and any local changes as the original project and to 
     23 hopefully avoid people pestering the original authors about bugs I may introduce
     24 while poking at their code.
     25 
     26 . . .
     27 
     28 The code has been organized into kernel/, include/, user/, ulib/, and tools/
     29 subdirectories, and arranged so that the build puts intermediate object files
     30 into kobj/ and uobj/ directories, other intermediates into out/, and the
     31 filesystem contents into fs/.
     32 
     33 The Makefile defaults to building the 32bit version of xv6.  Define the X64
     34 environment variable to build the 64bit version.
     35 
     36 README.64BIT contains notes about the 64bit port.