[PATCH] elfclassify tool

[Mark Wielaard]

On Fri, Jul 19, 2019 at 02:47:09PM +0200, Mark Wielaard wrote:
> The individual commits can be found here:
> https://code.wildebeest.org/git/user/mjw/elfutils/log/?h=elfclassify
> 
> Please let me know if any of this looks bad or unusual.
> 
> I'll write some testcases.

And as always when writing tests you find some corner cases :)
So the attached is some testcases plus some fixes:
- Handle files without sections (only phdrs), in particular handle
  PT_DYNAMIC directly (not through a section).
- is_loadable should check whether it isn't a debug-only file
  (but only if there are section headers, if not, it cannot be debug-only).
- For .debug_only we can also have just a .symtab (but no .debug sections).
  And any allocated section makes it not-debug-only (except for SHT_NOBITS
  or SHT_NOTE)
- Detect .zdebug sections too (old GNU compressed ELF sections).

Cheers,

Mark
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