[all-commits] [llvm/llvm-project] 6c9f68: [lld-macho] Support EH frame pointer encodings tha...

[Jez Ng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6c9f6812523a706c11a12e6cb4119b0cf67bbb21
      https://github.com/llvm/llvm-project/commit/6c9f6812523a706c11a12e6cb4119b0cf67bbb21
  Author: Jez Ng <jezng at fb.com>
  Date:   2022-07-31 (Sun, 31 Jul 2022)

  Changed paths:
    M lld/MachO/EhFrame.cpp
    M lld/MachO/EhFrame.h
    M lld/MachO/InputFiles.cpp
    A lld/test/MachO/eh-frame-sdata4.s

  Log Message:
  -----------
  [lld-macho] Support EH frame pointer encodings that use sdata4

Previously we only supporting using the system pointer size (aka the
`absptr` encoding) because `llvm-mc`'s CFI directives always generate EH
frames with that encoding. But libffi uses 4-byte-encoded, hand-rolled
EH frames, so this patch adds support for it.

Fixes #56576.

Reviewed By: #lld-macho, oontvoo

Differential Revision: https://reviews.llvm.org/D130804