[all-commits] [llvm/llvm-project] f56118: [PAC][lld] Properly handle `.relr.auth.dyn` -> `.r...

[Daniil Kovalev via All-commits]

  Branch: refs/heads/users/kovdan01/pauth-relr-rela-movement
  Home:   https://github.com/llvm/llvm-project
  Commit: f56118310a8faff21d1a2a5a262ca18b3e36da5c
      https://github.com/llvm/llvm-project/commit/f56118310a8faff21d1a2a5a262ca18b3e36da5c
  Author: Daniil Kovalev <dkovalev at accesssoftek.com>
  Date:   2026-05-04 (Mon, 04 May 2026)

  Changed paths:
    M lld/ELF/SyntheticSections.cpp
    M lld/ELF/SyntheticSections.h
    M lld/ELF/Writer.cpp
    M lld/test/ELF/aarch64-reloc-pauth.s

  Log Message:
  -----------
  [PAC][lld] Properly handle `.relr.auth.dyn` -> `.rela.dyn` movement

Address the following issues reported in #171475:

1. Proper adjustment of `__rela_iplt_end` address if a move from
   `.relr.auth.dyn` to `.rela.dyn` took place

2. Set `__rela_iplt_start` properly if prior to such movement from
   `.relr.auth.dyn`, the `.rela.dyn` was empty

3. Allocate enough space for both RELA* and AARCH64_AUTH_RELR* tags in
   the `.dynamic` section in case we end up with both `.relr.auth.dyn`
   and `.rela.dyn`. If one of the sections becomes empty - just pad the
   `.dynamic` section with null tags in the end.



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