[PATCH] D76995: [ELF] Propagate LMA offset to sections with neither AT() nor AT>

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
MaskRay added reviewers: andrewng, grimar, psmith, ruiu.
Herald added subscribers: llvm-commits, arichardson, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.
MaskRay updated this revision to Diff 253377.
MaskRay added a comment.

Improve docs/ELF/linker_script.rst


Fixes https://bugs.llvm.org/show_bug.cgi?id=45313
Also fixes linkerscript/{at4.s,overlay.test} LMA address issues exposed by
011b785505b1f6d315a93fd0a0409576ad8d1805 <https://reviews.llvm.org/rG011b785505b1f6d315a93fd0a0409576ad8d1805>.
Related: D74297 <https://reviews.llvm.org/D74297>

This patch improves emulation of GNU ld's heuristics on the difference
between the LMA and the VMA:
https://sourceware.org/binutils/docs/ld/Output-Section-LMA.html#Output-Section-LMA

New test linkerscript/lma-difference.s (based on at4.s) demonstrates some
behaviors.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D76995

Files:
  lld/ELF/LinkerScript.cpp
  lld/docs/ELF/linker_script.rst
  lld/test/ELF/linkerscript/at4.s
  lld/test/ELF/linkerscript/lma-difference.s
  lld/test/ELF/linkerscript/loadaddr.s
  lld/test/ELF/linkerscript/map-file2.test
  lld/test/ELF/linkerscript/overlay.test

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