[all-commits] [llvm/llvm-project] de0dda: [ELF] Warn changed output section address

[Fangrui Song via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: de0dda54d38137d0714c279a540074fe73822b8b
      https://github.com/llvm/llvm-project/commit/de0dda54d38137d0714c279a540074fe73822b8b
  Author: Fangrui Song <maskray at google.com>
  Date:   2020-02-21 (Fri, 21 Feb 2020)

  Changed paths:
    M lld/ELF/LinkerScript.cpp
    M lld/ELF/LinkerScript.h
    M lld/ELF/Writer.cpp
    M lld/test/ELF/linkerscript/lma-align.test
    M lld/test/ELF/linkerscript/section-align2.test

  Log Message:
  -----------
  [ELF] Warn changed output section address

When the output section address (addrExpr) is specified, GNU ld warns if
sh_addr is different. This patch implements the warning.

Note, LinkerScript::assignAddresses can be called more than once. We
need to record the changed section addresses, and only report the
warnings after the addresses are finalized.

Reviewed By: grimar

Differential Revision: https://reviews.llvm.org/D74741