Teach llvm-readobj to print human friendly description of reserved sections.

llvm-svn: 204584

1 files changed, 22 insertions, 2 deletions

diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index e4532a5476e..94b76d00e79 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -625,8 +625,28 @@ void ELFDumper<ELFT>::printDynamicSymbols() {
 template <class ELFT>
 void ELFDumper<ELFT>::printSymbol(typename ELFO::Elf_Sym_Iter Symbol) {
   StringRef SymbolName = errorOrDefault(Obj->getSymbolName(Symbol));
-  const Elf_Shdr *Sec = Obj->getSection(&*Symbol);
-  StringRef SectionName = Sec ? errorOrDefault(Obj->getSectionName(Sec)) : "";
+
+  unsigned SectionIndex = Obj->getSymbolTableIndex(&*Symbol);
+  StringRef SectionName;
+  if (SectionIndex == SHN_UNDEF) {
+    SectionName = "Undefined";
+  } else if (SectionIndex >= SHN_LOPROC && SectionIndex <= SHN_HIPROC) {
+    SectionName = "Processor Specific";
+  } else if (SectionIndex >= SHN_LOOS && SectionIndex <= SHN_HIOS) {
+    SectionName = "Operating System Specific";
+  } else if (SectionIndex > SHN_HIOS && SectionIndex < SHN_ABS) {
+    SectionName = "Reserved";
+  } else if (SectionIndex == SHN_ABS) {
+    SectionName = "Absolute";
+  } else if (SectionIndex == SHN_COMMON) {
+    SectionName = "Common";
+  } else {
+    assert(SectionIndex != SHN_XINDEX &&
+           "getSymbolTableIndex should handle this");
+    const Elf_Shdr *Sec = Obj->getSection(SectionIndex);
+    SectionName = errorOrDefault(Obj->getSectionName(Sec));
+  }
+
   std::string FullSymbolName(SymbolName);
   if (Symbol.isDynamic()) {
     bool IsDefault;