[all-commits] [llvm/llvm-project] 4cb90c: [Thumb, ELF] Fix access to dso_preemptable __stack_...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4cb90ca8f8bfbe8dc938a1b8b821d98640cbab4c
      https://github.com/llvm/llvm-project/commit/4cb90ca8f8bfbe8dc938a1b8b821d98640cbab4c
  Author: Fangrui Song <i at maskray.me>
  Date:   2024-01-22 (Mon, 22 Jan 2024)

  Changed paths:
    M llvm/lib/Target/ARM/Thumb1InstrInfo.cpp
    M llvm/lib/Target/ARM/Thumb2InstrInfo.cpp
    M llvm/test/CodeGen/ARM/stack-guard-elf.ll

  Log Message:
  -----------
  [Thumb,ELF] Fix access to dso_preemptable __stack_chk_guard with static relocation model (#78950)

PR #70014 fixes A32 to use GOT for dso_preemptable `__stack_chk_guard`
with static relocation model (e.g. -fPIE/-fPIC LTO compiles with -no-pie
linking).

This patch fixes such `__stack_chk_guard` access for Thumb1 and Thumb2.
Note: `t2LDRLIT_ga_pcrel` is only for ELF. mingw needs
`.refptr.__stack_chk_guard` (https://reviews.llvm.org/D92738).

Fix #64999