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Pointer guard for static binaries?

From: Daniel Jacobowitz <drow at false dot org>
To: libc-alpha at sourceware dot org
Date: Fri, 23 Dec 2005 12:57:02 -0500
Subject: Pointer guard for static binaries?

It looks like the pointer guard is currently never initialized for static
binaries.  The fallback __pointer_chk_guard is definitely never defined.
For architectures which use a TLS access for the pointer guard, this means
the guard is always zero.

I noticed this trying to define a non-TLS pointer guard on ARM; the primary
advantage of the TLS pointer guard appears to be efficiency, as far as I can
tell, and even PIC access is more efficient than TLS access on ARM.

-- 
Daniel Jacobowitz
CodeSourcery, LLC

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