[PATCH] D20024: [ELF] - Protect first entries of got.plt with RelRo.

[George Rimar via llvm-commits]

grimar created this revision.
grimar added reviewers: ruiu, rafael.
grimar added subscribers: grimar, llvm-commits.
Herald added a subscriber: joker.eph.

First entries of got.plt can be protected using RelRo technique,
this patch implements this by shifting got.plt to the memory page,
where relro is active.

Both gold and bfd do that and it should be good for security.

http://reviews.llvm.org/D20024

Files:
  ELF/OutputSections.h
  ELF/Writer.cpp
  test/ELF/aarch64-condb-reloc.s
  test/ELF/aarch64-gnu-ifunc.s
  test/ELF/aarch64-tstbr14-reloc.s
  test/ELF/copy-rel-pie.s
  test/ELF/dynamic-reloc-index.s
  test/ELF/dynamic-reloc.s
  test/ELF/gnu-ifunc-i386.s
  test/ELF/gnu-ifunc.s
  test/ELF/lto/undefined-puts.ll
  test/ELF/mips-26.s
  test/ELF/plt-aarch64.s
  test/ELF/plt-i686.s
  test/ELF/plt.s
  test/ELF/relocation.s
  test/ELF/relro.s
  test/ELF/undef-with-plt-addr.s

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