[PATCH] D50052: [LLD] Improve handling of AT> linker script commands

[Konstantin Schwarz via Phabricator via llvm-commits]

kschwarz created this revision.
kschwarz added reviewers: ruiu, grimar.
Herald added subscribers: llvm-commits, arichardson, emaste.
Herald added a reviewer: espindola.

The condition to create a new phdr must also check the usage of "AT>" linker script command, and create a new PT_LOAD header if a new LMARegion is used (test case at6.test)

If more than a single output section is added to a PT_LOAD header, only the first section should set the LMAOffset of the segment. Otherwise, we get a load-address overlap error (test case at7.test)

Moreover, if both the MemRegion and LMARegion are set, we should only increase the LMARegion if it is different from the MemRegion. Otherwise, we reserve the memory twice (test case at8.test)

This fixes PR38307


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D50052

Files:
  ELF/LinkerScript.cpp
  ELF/Writer.cpp
  test/ELF/linkerscript/Inputs/at6.s
  test/ELF/linkerscript/Inputs/at7.s
  test/ELF/linkerscript/Inputs/at8.s
  test/ELF/linkerscript/at6.test
  test/ELF/linkerscript/at7.test
  test/ELF/linkerscript/at8.test

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