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

[James Henderson via llvm-commits]

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@@ -131,7 +200,121 @@ 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) {
+      auto AuxEntTbl = &Sym.AuxEntries;
+      switch (Sym.StorageClass) {
+      case XCOFF::C_FILE: {
+        for (int 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();
+          XCOFFYAML::FileAuxEnt FileAuxSym;
+          FileAuxSym.FileNameOrString = FileNameOrError.get();
+          FileAuxSym.FileStringType = FileAuxEntPtr->Type;
+          AuxEntTbl->push_back(
+              std::make_unique<XCOFFYAML::FileAuxEnt>(FileAuxSym));
+        }
+        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 (int I = 1; I <= NumOfAuxSym; I++) {
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jh7370 wrote:

Same comments as above.

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