[llvm] [llvm-readobj] Print AMDGPU specific values in GNU mode (PR #75661)

[Joseph Huber via llvm-commits]

================
@@ -3630,6 +3641,28 @@ template <class ELFT> void GNUELFDumper<ELFT>::printFileHeaders() {
   else if (e.e_machine == EM_XTENSA)
     ElfFlags = printFlags(e.e_flags, ArrayRef(ElfHeaderXtensaFlags),
                           unsigned(ELF::EF_XTENSA_MACH));
+  else if (e.e_machine == EM_AMDGPU) {
+    switch (e.e_ident[ELF::EI_ABIVERSION]) {
+    default:
+      break;
+    case 0:
+      // ELFOSABI_AMDGPU_PAL, ELFOSABI_AMDGPU_MESA3D support *_V3 flags.
+      [[fallthrough]];
+    case ELF::ELFABIVERSION_AMDGPU_HSA_V3:
+      ElfFlags =
+          printFlags(e.e_flags, ArrayRef(ElfHeaderAMDGPUFlagsABIVersion3),
+                     unsigned(ELF::EF_AMDGPU_MACH));
----------------
jhuber6 wrote:

It's consistent with the other uses next to it, didn't want to rework anything.

https://github.com/llvm/llvm-project/pull/75661