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Date: Sun, 15 Apr 2007 22:37:08 +0300
From: "Blue Swirl" <blauwirbel@gmail.com>
Subject: Re: [Qemu-devel] qemu/pc-bios README openbios-sparc32 openbios-s...
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To: Paul Brook <paul@codesourcery.com>
Cc: qemu-devel@nongnu.org

On 4/15/07, Paul Brook <paul@codesourcery.com> wrote:
> On Sunday 15 April 2007 20:11, Blue Swirl wrote:
> > > Probably the linker is making sure the file offset and VMA are the same
> > > modulo the page size.
> >
> > But that would be one huge file, as the VMA is near 2TB:
>
> I said *modulo the pace size* :-)
> Lets say ld thinks the page size for your system is 1Mb (nor an unreasonable
> assumption).  The vma of .text is aligned on a 1Mb boundary. In order to
> allow loading via mmap, the location of .text within the file must also be
> aligned on a 1Mb boundary. It can't put it at address zero because the ELF
> headers get in the way, so the first viable location is 1Mb into the file.

Nice theory (and I missed the modulo arithmetic, sorry), but on
Ultrasparc the page sizes available are 8k, 64k, 4M and 256M.