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From:	"Ralf Habacker" <Ralf DOT Habacker AT freenet DOT de>
To:	<cygwin AT cygwin DOT com>, <binutils AT sources DOT redhat DOT com>
Subject:	RE: [PATCH] exclude runtime-pseudo-reloc symbols from auto-export
Date:	Sat, 21 Dec 2002 20:26:14 +0100
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In-Reply-To:	<20021221171952.GA22113@redhat.com>

>>
> >What about putting such symbols in another named text section, so that
> >ld would ignore them ?
>
> I don't see how you could do that since the symbol is associated with an
> existing place in memory.  We could put the whole function in a
> different segment

I had in mind something like this
#define NO_EXPORT_TEXT __attribute__((section(".text_no_export")))
#define NO_EXPORT_DATA __attribute__((section(".data_no_export")))
but this need some additional efforts in the ld source.


> but that's not the kind of solution I was thinking of.
>
> I was thinking that there might be an unused attribute that could be
> pressed into service as a "don't auto export" (doesn't linux/elf have
> something like this?) or that there was a way to name the symbol in some
> way that wasn't easily available from a C program, like putting a "." in
> the name with an asm alias.

The weak attribute does not have any effect for at least gcc version 2.95.3-5
(cygwin special) and I can't see any other attribute, which could be used from
http://gcc.gnu.org/onlinedocs/gcc-3.2/gcc/Function-Attributes.html#Function%20At
tributes

Perhaps somebody else could see something usefull or the gcc could be patched to
uses the weak attribute ???

Ralf


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