coping with PT_PHDR not being in loaded segment

[Ian Lance Taylor]

   From: Ulrich Drepper <drepper@cygnus.com>
   Date: 06 May 1999 23:59:48 -0700

   Roland McGrath <roland@frob.com> writes:

   > I think I agree with Ian's analysis here.  The current libc (elf/dl-load.c)
   > still behaves the way he described for 2.0.7.  If the phdr is not visible
   > in the loaded image, then I think we should make a malloc'd copy to save in
   > the l_phdr pointer.

   I've made appropriate changes now.  They'll be in 2.1.1pre3.  But I
   nevertheless think that adding the phdr to a segment is a good idea.
   The phdr is always needed so why not load it?

The issue arose in a testsuite case.  The point is that ELF does not
require a PT_PHDR segment, and it does not require that the program
headers be in loadable memory, so the dynamic linker ought to support
this unusual case.

Ian