[llvm] [XCOFF][obj2yaml] support parsing auxiliary symbols for XCOFF (PR #70642)

[James Henderson via llvm-commits]

================
@@ -131,7 +209,119 @@ Error XCOFFDumper::dumpSymbols() {
 
     Sym.Type = SymbolEntRef.getSymbolType();
     Sym.StorageClass = SymbolEntRef.getStorageClass();
-    Sym.NumberOfAuxEntries = SymbolEntRef.getNumberOfAuxEntries();
+    uint8_t NumOfAuxSym = SymbolEntRef.getNumberOfAuxEntries();
+    Sym.NumberOfAuxEntries = NumOfAuxSym;
+
+    if (NumOfAuxSym) {
+      std::vector<std::unique_ptr<XCOFFYAML::AuxSymbolEnt>> AuxEntTbl;
+      switch (Sym.StorageClass) {
+      case XCOFF::C_FILE: {
+        for (uint8_t I = 1; I <= NumOfAuxSym; ++I) {
+          uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
+              SymbolEntRef.getEntryAddress(), I);
+          const XCOFFFileAuxEnt *FileAuxEntPtr =
+              getAuxEntPtr<XCOFFFileAuxEnt>(AuxAddress);
+          auto FileNameOrError = Obj.getCFileName(FileAuxEntPtr);
+          if (!FileNameOrError)
+            return FileNameOrError.takeError();
+
+          dumpFileAuxSym(AuxEntTbl, FileAuxEntPtr->Type, FileNameOrError.get());
+        }
+        break;
+      }
+      case XCOFF::C_STAT: {
+        assert(NumOfAuxSym == 1 && "expected a single aux symbol for C_STAT!");
+        const XCOFFSectAuxEntForStat *AuxEntPtr =
+            getAuxEntPtr<XCOFFSectAuxEntForStat>(
+                XCOFFObjectFile::getAdvancedSymbolEntryAddress(
+                    SymbolEntRef.getEntryAddress(), 1));
+        dumpStatAuxSym(AuxEntTbl, *AuxEntPtr);
+        break;
+      }
+      case XCOFF::C_EXT:
+      case XCOFF::C_WEAKEXT:
+      case XCOFF::C_HIDEXT: {
+        for (uint8_t I = 1; I <= NumOfAuxSym; ++I) {
----------------
jh7370 wrote:

Same as above - please move this into a function, as requested before.

https://github.com/llvm/llvm-project/pull/70642