[all-commits] [llvm/llvm-project] 82ef86: [BOLT] Set IsRelro section attribute based on PT_G...

[Amir Ayupov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 82ef86c194cadd018349df68b4da6db110fdecb4
      https://github.com/llvm/llvm-project/commit/82ef86c194cadd018349df68b4da6db110fdecb4
  Author: Amir Ayupov <aaupov at fb.com>
  Date:   2023-06-20 (Tue, 20 Jun 2023)

  Changed paths:
    M bolt/include/bolt/Core/BinarySection.h
    M bolt/include/bolt/Rewrite/RewriteInstance.h
    M bolt/lib/Rewrite/RewriteInstance.cpp
    A bolt/test/X86/pt_gnu_relro.s

  Log Message:
  -----------
  [BOLT] Set IsRelro section attribute based on PT_GNU_RELRO segment

Handle PT_GNU_RELRO segment in accordance with Linux Standard Base spec
chapter 12:

> PT_GNU_RELRO
> The array element specifies the location and size of a segment which may
> be made *read-only* after relocations have been processed.

Perform a readelf-style mapping check between this segment and sections,
set `IsRelro` section attribute.

Reviewed By: #bolt, maksfb

Differential Revision: https://reviews.llvm.org/D152944