[Bug ld/20815] throw errors for invalid load segment

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20815

--- Comment #15 from Nick Clifton <nickc at redhat dot com> ---
Created attachment 9646
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9646&action=edit
Proposed patch

Hi Ma,

  OK - now we are getting somewhere.  So - I have uploaded a patch to readelf
which will allow it to detect and report invalid PT_PHDR segments.  With this
we can now detect broken binaries.

  The next step is to reproduce the problem locally so that it can be
investigated.  This is where I am currently having problems.  I tried compiling
the test.c file as you suggested (gcc -c test.c; ld test.o -T pad.ld) but this
produced an output file like the one I uploaded - ie without a PT_PHDR segment.
 So there must be something different about our build environments.  I am going
to assume that the version of gcc being used is irrelevant, so it must be the
linker.  I have been using a version built from the latest development sources
and configured for an x86_64-pc-linux-gnu target.  What are you using ?

Cheers
  Nick

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