[PATCH] D49541: [ELF] - Implement SHT_SYMTAB_SHNDX (.symtab_shndxr) section.

[George Rimar via Phabricator via llvm-commits]

grimar created this revision.
grimar added a reviewer: ruiu.
Herald added subscribers: arichardson, emaste.
Herald added a reviewer: espindola.

This is relative to https://bugs.llvm.org//show_bug.cgi?id=38119.

SHT_SYMTAB section is able to keep symbols with output section indices up to 0xff00 (SHN_LORESERVE).
But if we have indices that are greater than that (PR shows that it might happen), we need to use
SHT_SYMTAB_SHNDX extended section. It was not supported by LLD.

Description of the SHT_SYMTAB_SHNDX  section is here:
https://docs.oracle.com/cd/E19683-01/817-3677/chapter6-94076/index.html.


https://reviews.llvm.org/D49541

Files:
  ELF/SyntheticSections.cpp
  ELF/SyntheticSections.h
  ELF/Writer.cpp
  test/ELF/linkerscript/orphan-report.s
  test/ELF/relocatable-many-sections.s

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