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Re: [RFC] PR ld/13621
- From: Alan Modra <amodra at gmail dot com>
- To: Mark Wielaard <mjw at redhat dot com>
- Cc: Richard Henderson <rth at redhat dot com>, binutils at sourceware dot org
- Date: Tue, 7 Feb 2012 22:27:39 +1030
- Subject: Re: [RFC] PR ld/13621
- References: <4F25EAD1.email@example.com> <20120130032626.GC8407@bubble.grove.modra.org> <20120130082840.GB16460@toonder.wildebeest.org> <20120130131722.GA12169@bubble.grove.modra.org> <firstname.lastname@example.org> <20120130231623.GB12169@bubble.grove.modra.org> <email@example.com>
On Tue, Jan 31, 2012 at 10:57:43AM +0100, Mark Wielaard wrote:
> On Tue, 2012-01-31 at 09:46 +1030, Alan Modra wrote:
> > As far as symbols go, the ELF spec says that st_value for (non-common)
> > symbols in relocatable object files is an offset from the beginning of
> > a section. There is nothing to say that values should be within the
> > section bounds.
> But it does also say "If a symbol's value refers to a specific location
> within a section, its section index member, st_shndx, holds an index
> into the section header table." and again when defining SHN_XINDEX it
> says "It indicates that the symbol refers to a specific location within
> a section...". So I would interpret that as saying the offset shouldn't
> be outside the section.
You do have a point. I'll not throw a fit and revert rth's patch
if he still wants to commit it. :)
You can of course easily create symbols outside of a sections. For
.byte 2, 3, 5, 7, 11, 13, 17, 19, 23
y = x - '1'
But, yeah, I can't think of a really good reason why you would want to
Australia Development Lab, IBM