specifying alignment of loader files

[Warner Losh]

On Tue, Jun 12, 2018 at 11:04 AM, Mark Johnston <markj at freebsd.org> wrote:

> Hi,
>
> I'm writing some code which processes a file loaded by the loader.  I
> want the file's contents to be available at a certain alignment in
> memory, and as far as I can see, the loader provides no alignment
> guarantees today.  The access will happen early enough during boot that
> making an aligned copy of the data will be awkward, so I'd like the
> loader to provide the desired alignment.
>
> I'm considering adding a new "module_align" variable that would specify
> the alignment for a given file type, and plumb that through to
> command_load().  Does anyone have an alternate suggestion, or an
> objection to my proposal?
>

I thought the loader already did that for ELF sections... Why not wrap your
file in such a segment?

Warner