Re: [Xen-devel] [PATCH] libxc: elf_kernel loader: Remove check for shstrtab

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, May 15, 2019 at 12:40:15PM +0100, Anthony PERARD wrote:
> This was probably useful to load ELF Note, but now ELF notes
> "should live in a PT_NOTE segment" (elfnote.h).
> 
> With notes living in segment, there are no need for sections, so there
> is nothing to be stored in the shstrtab.
> 
> This patch would allow to write a simpler ELF header for an OVMF blob
> (which isn't an ELF) and allow it to be loaded as a PVH kernel. The
> header only needs to declare two program segments:
> - one to tell an ELF loader where to put the blob,
> - one for a Xen ELFNOTE.
> 
> The ELFNOTE is to comply to the pvh design which wants the
> XEN_ELFNOTE_PHYS32_ENTRY to declare a blob as compaptible with the PVH
> boot ABI.
> 
> Note that without the ELFNOTE, libxc will load an ELF but with
> the plain ELF loader, which doesn't check for shstrtab.
> 
> Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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