18 Sep
2003
18 Sep
'03
1:45 p.m.
On Thu, Sep 18, 2003 at 01:41:10PM +0300, Aharon Robbins wrote:
Pretty damn hard. All identifiers, (variable names) are reduced to
a single token. Actually, that's not true. The meaning of the names
is removed an replaced with numeric identifiers that are unique to
each file. Here's a tokenised portion of 32V (bio.c):
56: struct id10 *
57: id13 ( id14 , id15 )
58: id16 id14 ;
59: id17 id15 ;
60: {
61: register struct id10 * id18 ;
62:
63: id18 = id19 ( id14 , id15 ) ;
64: if ( id18 ->id20 & id21 ) {
65: #ifdef id1
66: id9 . id5 ++ ;
67: #endif
68: return( id18 ) ;
69: }
70: id18 ->id20 |= id22 ;
71: id18 ->id23 = id24 ;
72: ( * id25 [ id26 ( id14 ) ] . id27 ) ( id18 ) ;
73: #ifdef id1
74: id9 . id3 ++ ;
75: #endif
76: id28 ( id18 ) ;
77: return( id18 ) ;
78: }
Now go and check the actual source and work out which function it is!
[ see http://minnie.tuhs.org/UnixTree/32VKern/usr/src/sys/sys/bio.c.html ]
Warren
If anybody has
Unix kernel trees which they cannot divulge due to licensing
restrictions, I'd appreciate you creating tokenised files of the kernel
source and e-mailing them to me.
Hmmm. Just between us chickens, given tokenized versions of an entire tree,
how hard would it be to recreate a functional kernel?