[PATCH] D130804: [lld-macho] Support EH frame pointer encodings that use sdata4

[Jez Ng via Phabricator via llvm-commits]

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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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D130804

Files:
  lld/MachO/EhFrame.cpp
  lld/MachO/EhFrame.h
  lld/MachO/InputFiles.cpp
  lld/test/MachO/eh-frame-sdata4.s

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