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From: mp@mit-eddie.UUCP
Newsgroups: net.bugs.4bsd
Subject: stab(5) man page lies
Message-ID: <570@mit-eddi.UUCP>
Date: Tue, 9-Aug-83 16:32:07 EDT
Article-I.D.: mit-eddi.570
Posted: Tue Aug  9 16:32:07 1983
Date-Received: Sun, 14-Aug-83 00:16:12 EDT
Lines: 15

The 4.{1,2}bsd stab(5) man page claims that the n_desc field (a short) can
be considered a
	struct desc {
		short q6:2,q5:2,q4:2,q3:2,q2:2,q1:2,basic:4
	};

However, this structure is backwards; the bit fields are assigned
right-to-left on a VAX, yet the format of n_desc (as set up by pcc) is such
that the "basic" field is in the low 4 bits, q1 is just to the left of that,
and so on.

It's interesting to note that neither pcc nor sdb uses the desc structure;
they prefer to do the left and right shifts "manually".

	Mark