[llvm] [llvm-readobj][AArch64][ELF][PAC] Support ELF AUTH constants (PR #72713)

[Fangrui Song via llvm-commits]

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@@ -6208,6 +6263,13 @@ void ELFDumper<ELFT>::forEachRelocationDo(
       Warn(RangeOrErr.takeError());
     }
     break;
+  case ELF::SHT_AARCH64_AUTH_RELR:
+    if (Obj.getHeader().e_machine != EM_AARCH64) {
+      this->reportUniqueWarning(
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MaskRay wrote:

I haven't checked, but if we can guarantee `assert(Obj.getHeader().e_machine == EM_AARCH64)`. It's better than `if (EM_AARCH64 && ELF::SHT_AARCH64_AUTH_RELR) do`

https://github.com/llvm/llvm-project/pull/72713