[lld] [lld] Add thunks for hexagon (PR #111217)

[Fangrui Song via llvm-commits]

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@@ -1519,6 +1535,39 @@ bool PPC64LongBranchThunk::isCompatibleWith(const InputSection &isec,
   return rel.type == R_PPC64_REL24 || rel.type == R_PPC64_REL14;
 }
 
+// Hexagon Target Thunks
+static uint64_t getHexagonThunkDestVA(Ctx &ctx, const Symbol &s, int64_t a) {
+  uint64_t v = s.isInPlt(ctx) ? s.getPltVA(ctx) : s.getVA(ctx, a);
+  return SignExtend64<32>(v); // FIXME: sign extend to 64-bit?
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MaskRay wrote:

Why is there a FIXME?

https://github.com/llvm/llvm-project/pull/111217