[Bug libelf/34468] elf_update() with ELF_C_RDWR can overwrite gaps between sections

[bmenrigh at brandonenright dot net]

https://sourceware.org/bugzilla/show_bug.cgi?id=34468

--- Comment #1 from Brandon Enright <bmenrigh at brandonenright dot net> ---
While looking into the possibility of working around this bug by switching
debugedit to us the ELF_C_RDWR_MMAP writer, we ran into correctness issues with
that writer too.

See attachment 968690 in the linked Gentoo bug.

It seems that when section headers get relocated, not all of the headers are
properly marked as dirty and written back with the MMAP writer.

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