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From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Mon, 3 Jan 2022 05:40:29 -0800
Message-ID: <CAMe9rOrn6Xt5gvb07cbRjdmTKV=QYBa5v9PjWYNJr+JvGG8-dA@mail.gmail.com>
Subject: Re: ELF LOAD segments creating holes in the process image on GNU/Linux
To: Florian Weimer <fweimer@redhat.com>
Cc: Binutils <binutils@sourceware.org>
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On Mon, Jan 3, 2022 at 5:23 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * H. J. Lu:
>
> >> Ideally?  p_offset, p_vaddr, p_filesz, p_memsz should all be multiples
> >> of the page size, to closer reflect what can actually be loaded.
> >>
> >> Then, for each LOAD segment, p_vaddr plus p_memsz should be equal to
> >> p_vaddr of the next LOAD segment.
> >
> > Filled with zeros?
>
> No, with file contents.  We can't zero-fill at a sub-page granularity.
> There shouldn't be page-sized holes, definitely not for 4K-only targets.

Do you mean padding these segments with zeros in file?


-- 
H.J.