llvm-readobj: add support for printing GNU Notes

Add support for printing the GNU Notes.  This allows an easy way to view the
build id for a binary built with the build id.  Currently, this only handles the
GNU notes, though it would be easy to extend for other note types (default,
FreeBSD, NetBSD, etc).  Only the GNU style is supported currently.

llvm-svn: 280131

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/tools/llvm-readobj/llvm-readobj.cpp b/llvm/tools/llvm-readobj/llvm-readobj.cpp
index d811ea995ba..53d6782a671 100644
--- a/llvm/tools/llvm-readobj/llvm-readobj.cpp
+++ b/llvm/tools/llvm-readobj/llvm-readobj.cpp
@@ -92,6 +92,10 @@ namespace opts {
     cl::desc("Alias for --relocations"),
     cl::aliasopt(Relocations));
 
+  // -notes, -n
+  cl::opt<bool> Notes("notes", cl::desc("Display the ELF notes in the file"));
+  cl::alias NotesShort("n", cl::desc("Alias for --notes"), cl::aliasopt(Notes));
+
   // -dyn-relocations
   cl::opt<bool> DynRelocs("dyn-relocations",
     cl::desc("Display the dynamic relocation entries in the file"));
@@ -408,6 +412,8 @@ static void dumpObject(const ObjectFile *Obj) {
       Dumper->printGroupSections();
     if (opts::HashHistogram)
       Dumper->printHashHistogram();
+    if (opts::Notes)
+      Dumper->printNotes();
   }
   if (Obj->isCOFF()) {
     if (opts::COFFImports)