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From: jgm@k.gp.cs.cmu.edu (John Myers)
Newsgroups: gnu.utils.bug
Subject: Problem with .stabn in gas
Message-ID: <3458@pt.cs.cmu.edu>
Date: 31 Oct 88 20:06:01 GMT
Sender: netnews@pt.cs.cmu.edu
Reply-To: jgm@k.gp.cs.cmu.edu (John Myers)
Organization: Carnegie-Mellon University, CS/RI
Lines: 34
Keywords:

In gas "version 1.25 (I guess.)" the routine stab in read.c has the
following code:

		case 'n':
			symbolP->sy_frag = frag_now;
			break;

		case 's':
			symbolP->sy_frag = & zero_address_frag;
			break;

Why the code is distinguishing between ".stabn" and ".stabs" I don't
know, but it breaks ".stabn" directives that refer to text labels
defined later in the file, such as:

	.stabn 0xc4,4,12,L2
	moveq #3,d0
	jra L1
L2:

(You don't want to know what we're using "0xc4" type stabs for.)

The n_value for the stab entry ends up being way out in right field.
I worked around this by generating a '.stabs "",' instead of a
'.stabd', but I was under the impression that these two were supposed
to be equivalent.

Shouldn't "symbolP->sy_frag" be initialized to "& zero_address_frag"
for ".stabn"'s?

-- 
_.John G. Myers		Internet: John.Myers@cs.cmu.edu
			LoseNet:  ...!seismo!inhp4!wiscvm.wisc.edu!give!up
"The world is full of bozos.  Some of them even have PhD's in Computer Science"