[all-commits] [llvm/llvm-project] 9e33c0: [ELF] Keep orphan section names (.rodata.foo .text...

[Fangrui Song via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 9e33c096476ab5e02ab1c8442cc3cb4e32e29f17
      https://github.com/llvm/llvm-project/commit/9e33c096476ab5e02ab1c8442cc3cb4e32e29f17
  Author: Fangrui Song <maskray at google.com>
  Date:   2020-03-23 (Mon, 23 Mar 2020)

  Changed paths:
    M lld/ELF/Writer.cpp
    M lld/test/ELF/linkerscript/data-commands-gc.s
    M lld/test/ELF/linkerscript/icf-output-sections.s
    M lld/test/ELF/linkerscript/linkorder.s
    M lld/test/ELF/linkerscript/linkorder2.s
    M lld/test/ELF/linkerscript/memory3.s
    M lld/test/ELF/linkerscript/orphan-report.s
    M lld/test/ELF/linkerscript/symbol-assign-many-passes2.test
    M lld/test/ELF/mips-npic-call-pic-script.s
    M lld/test/ELF/shuffle-sections-init-fini.s
    M lld/test/ELF/text-section-prefix.s

  Log Message:
  -----------
  [ELF] Keep orphan section names (.rodata.foo .text.foo) unchanged if !hasSectionsCommand

This behavior matches GNU ld and seems reasonable.

```
// If a SECTIONS command is not specified
.text.* -> .text
.rodata.* -> .rodata
.init_array.* -> .init_array
```

A proposed Linux feature CONFIG_FG_KASLR may depend on the GNU ld behavior.

Reword a comment about -z keep-text-section-prefix and a comment about
CommonSection (deleted by rL286234).

Reviewed By: grimar

Differential Revision: https://reviews.llvm.org/D75225