Re: RFC: bug in load_elf_binary?

[Jeremy Fitzhardinge <jeremy@goop.org>]

Chris Friesen wrote:
> The elf spec says that PT_LOAD segments must be ordered by vaddr.  We
> want to have a segment at a relatively low fixed vaddr.  The exact
> address is not important, except that it's lower than the standard elf
> headers and so it must be the first segment in the elf file.

So you want a zero mapping at a particular address?  So the vaddr and
the memsz are set, but offset and filesz are zero?

> In the kernel elf loader, the p_vaddr and p_offset of the first
> segment are used to determine the load_addr for use with the rest of
> the segments.  In the case of this elf file, the first segment does
> not actually have a valid p_offset.

Well, you could make the p_offset the same as the first segment with a
non-zero filesz.  That should satisfy the elf loader, though it might
still confuse things.

Why can't you create this mapping at runtime?

    J