tree 7d17e95a8ba2a8a68b43b380c97dfedd5ff87ce7
parent 44b9d3ffe402a66ebbfcbf68dc7b68be91d91518
author alx32 <103613512+alx32@users.noreply.github.com> 1711575267 -0700
committer Copybara-Service <copybara-worker@google.com> 1711575393 -0700

[lld-macho] Implement support for ObjC relative method lists (#86231)

The MachO format supports relative offsets for ObjC method lists. This
support is present already in ld64. With this change we implement this
support in lld also.

Relative method lists can be identified by a specific flag (0x80000000)
in the method list header. When this flag is present, the method list
will contain 32-bit relative offsets to the current Program Counter
(PC), instead of absolute pointers.
Additionally, when relative method lists are used, the offset to the
selector name will now be relative and point to the selector reference
(selref) instead of the name itself.

GitOrigin-RevId: 742a82a729925dc79641beb649f492003be40725