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

[James Henderson via llvm-commits]

================
@@ -459,3 +459,43 @@ ProgramHeaders:
   - Type:     PT_DYNAMIC
     FirstSec: .dynamic
     LastSec:  .dynamic
+
+## Show we print a warning for an invalid relocation table size stored in a DT_AARCH64_AUTH_RELRSZ entry.
+# RUN: yaml2obj --docnum=8 -DRELTYPE=RELR -DTAG1=DT_AARCH64_AUTH_RELRSZ -DTAG1VAL=0xFF -DTAG2=DT_AARCH64_AUTH_RELRENT %s -o %t8
+# RUN: llvm-readobj --dyn-relocations %t8 2>&1 | FileCheck %s -DFILE=%t8 --check-prefix=INVALID-DT-AARCH64-AUTH-RELRSZ
+# RUN: llvm-readelf --dyn-relocations %t8 2>&1 | FileCheck %s -DFILE=%t8 --check-prefix=INVALID-DT-AARCH64-AUTH-RELRSZ
+
+## INVALID-DT-AARCH64-AUTH-RELRSZ: warning: '[[FILE]]': invalid DT_AARCH64_AUTH_RELRSZ value (0xff) or DT_AARCH64_AUTH_RELRENT value (0x18)
----------------
jh7370 wrote:

Comments use `##`. Lit and FileCheck directives should use single `#`. Also applies below.

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