tree fc77b5988d778e042e8b4c432ec9bb5e2479eaff
parent b4e232dc3d3ae6193742c24215286c1f9b4282cd
author Jez Ng <jezng@fb.com> 1615487291 -0500
committer Copybara-Service <copybara-worker@google.com> 1616052927 -0700

[lld-macho] Fix handling of X86_64_RELOC_SIGNED_{1,2,4}

The previous implementation miscalculated the addend, resulting
in an underflow. This meant that every SIGNED_N section relocation would
be associated with the last subsection (since the addend would now be a
huge number). We were "lucky" that this mistake was typically cancelled
out -- 64-to-32-bit-truncation meant that the final value was correct,
as long as subsections were not rearranged.

Reviewed By: #lld-macho, thakis

Differential Revision: https://reviews.llvm.org/D98385

GitOrigin-RevId: e8a30583033596b80d51dc89ad166526b5446d88