[all-commits] [llvm/llvm-project] cca911: [lld][AArch64][ELF][PAC] Support AUTH relocations ...

[Daniil Kovalev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cca9115b1c640a307b510821cb84a1f3bb76b969
      https://github.com/llvm/llvm-project/commit/cca9115b1c640a307b510821cb84a1f3bb76b969
  Author: Daniil Kovalev <dkovalev at accesssoftek.com>
  Date:   2024-04-04 (Thu, 04 Apr 2024)

  Changed paths:
    M lld/ELF/Arch/AArch64.cpp
    M lld/ELF/Config.h
    M lld/ELF/Driver.cpp
    M lld/ELF/InputFiles.cpp
    M lld/ELF/InputFiles.h
    M lld/ELF/InputSection.cpp
    M lld/ELF/Relocations.cpp
    M lld/ELF/Relocations.h
    M lld/ELF/SyntheticSections.cpp
    M lld/ELF/Writer.cpp
    M lld/docs/ReleaseNotes.rst
    M lld/docs/ld.lld.1
    M lld/test/ELF/aarch64-bti-pac-cli-error.s
    A lld/test/ELF/aarch64-feature-pauth.s
    A lld/test/ELF/aarch64-reloc-pauth-ro.s
    A lld/test/ELF/aarch64-reloc-pauth.s

  Log Message:
  -----------
  [lld][AArch64][ELF][PAC] Support AUTH relocations and AUTH ELF marking (#72714)

This patch adds lld support for:

- Dynamic R_AARCH64_AUTH_* relocations (without including RELR compressed AUTH
relocations) as described here:
https://github.com/ARM-software/abi-aa/blob/main/pauthabielf64/pauthabielf64.rst#auth-variant-dynamic-relocations

- .note.AARCH64-PAUTH-ABI-tag section as defined here
https://github.com/ARM-software/abi-aa/blob/main/pauthabielf64/pauthabielf64.rst#elf-marking

Depends on #72713 and #85231

---------

Co-authored-by: Peter Collingbourne <peter at pcc.me.uk>
Co-authored-by: Fangrui Song <i at maskray.me>



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