leading padding in ELF segment

[Nathan Sidwell]

Paul Brook wrote:

> I've also seen armcc generate similar things.
> 
> Many OS require the file offset to be aligned so they can use mmap, but I 
> think that's an OS specific requirements on top of the basic ELF spec.

I thought that alignment applied to segments not sections.  BFD seems slightly 
confused about that, in that it sets a segment's alignment from the maximally 
aligned contained section (and looking at the algorithm it uses, I think it only 
works when the first section is the maximally aligned one.  Because a later 
section's offset depends on the sizes of the preceeding sections).

nathan
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