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To: root@chaos.analogic.com
Cc: "J.A. Magallon" <jamagallon@able.es>,
       Linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: Writable global section?
References: <Pine.LNX.3.95.1021009103521.3016B-100000@chaos.analogic.com>
X-Yow: We have DIFFERENT amounts of HAIR --
From: Andreas Schwab <schwab@suse.de>
Date: Wed, 09 Oct 2002 17:06:55 +0200
In-Reply-To: <Pine.LNX.3.95.1021009103521.3016B-100000@chaos.analogic.com> ("Richard
 B. Johnson"'s message of "Wed, 9 Oct 2002 10:49:57 -0400 (EDT)")
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"Richard B. Johnson" <root@chaos.analogic.com> writes:

|> If a variable is in the ".data" section, it is "seen" by all procedures
|> that are linked to the shared library, but any attempt to write to this
|> variable will seg-fault the task that attempts to modify it.

Your tests must be flawed, because a .data section *is* writable.  The
only difference between .data and .bss is that the latter has no
allocation in the image file, but they are mapped to the same, writable
segment.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 N?rnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
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