[MikeMcQuaid]

• Rewrite complete movabs prefix operands in ELF executable sections with separator padding to preserve instruction and suffix offsets.
• Find split prefixes omitted from older bottle metadata and preserve hardlinks when rewriting affected files.

Fixes #24074

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Codex with GPT 6 Astra at Extra High effort, with local review and testing.

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[Copilot]

Copilot review overview

🟡 Changes recommended

Unresolved relocation correctness and malformed-ELF handling issues remain.

Get a fresh assessment by requesting another Copilot review.

Review effort: Lite
Findings: 1

Open (1)

• Prevent final operand replacement from shrinking binary · New

What changed in this PR

Updates ELF binary relocation to handle x86-64 prefixes split across movabs operands while preserving offsets and hardlinks.

Changes:

• Rewrites split prefixes in executable ELF sections.
• Expands candidate discovery and preserves hardlinks.
• Adds regression tests and updates bottle compatibility documentation.

File	Summary
Library/​Homebrew/​test/​keg_relocate/​binary_relocation_spec.rb	Adds relocation, architecture, section, and hardlink coverage.
Library/​Homebrew/​keg_relocate.rb	Implements split-prefix detection and relocation; has one critical and three moderate unresolved findings.
docs/​Bottles.md	Documents prefix and cellar compatibility requirements.

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