Re: [Xen-devel] [PATCH v5] libelf: rewrite symtab/strtab loading

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Mar 01, 2016 at 12:59:50PM +0100, Roger Pau Monne wrote:
> Current implementation of elf_load_bsdsyms is broken when loading inside of
> a HVM guest, because it assumes elf_memcpy_safe is able to write into guest
> memory space, which it is not.
> 
> Take the oportunity to do some cleanup and properly document how
> elf_{parse/load}_bsdsyms works. The new implementation uses elf_load_image
> when dealing with data that needs to be copied to the guest memory space.
> Also reduce the number of section headers copied to the minimum necessary.
> 
> This patch also removes the duplication of code found in the libxc ELF
> loader, since the libelf symtab/strtab loading code will also handle this
> case without having to duplicate it.
> 
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> ---
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> Cc: Jan Beulich <JBeulich@xxxxxxxx>

I will defer this to someone who is more familiar with ELF stuff. Let me
know if anyone thinks my review is required.

Wei.

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