From a4d39d4b69b265ee41b08cd04f5292e3ddb31aeb Mon Sep 17 00:00:00 2001
From: Mitch Phillips <31459023+hctim@users.noreply.github.com>
Date: Wed, 1 Mar 2023 10:49:39 -0800
Subject: [llvm-readobj] Add --memtag

This adds functionality to readelf/readobj to specifically handle
MTE-related bits, like the AARCH64_MEMTAG_* dynamic entries, and a
decoder for the Android-specific ELF note.

Reviewed By: jhenderson, MaskRay

Differential Revision: https://reviews.llvm.org/D143693
---
 llvm/tools/llvm-readobj/llvm-readobj.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'llvm/tools/llvm-readobj/llvm-readobj.cpp')

diff --git a/llvm/tools/llvm-readobj/llvm-readobj.cpp b/llvm/tools/llvm-readobj/llvm-readobj.cpp
index aa49e30..d72eec0 100644
--- a/llvm/tools/llvm-readobj/llvm-readobj.cpp
+++ b/llvm/tools/llvm-readobj/llvm-readobj.cpp
@@ -136,6 +136,7 @@ static bool GnuHashTable;
 static bool HashSymbols;
 static bool HashTable;
 static bool HashHistogram;
+static bool Memtag;
 static bool NeededLibraries;
 static bool Notes;
 static bool ProgramHeaders;
@@ -266,6 +267,7 @@ static void parseOptions(const opt::InputArgList &Args) {
   opts::HashSymbols = Args.hasArg(OPT_hash_symbols);
   opts::HashTable = Args.hasArg(OPT_hash_table);
   opts::HashHistogram = Args.hasArg(OPT_histogram);
+  opts::Memtag = Args.hasArg(OPT_memtag);
   opts::NeededLibraries = Args.hasArg(OPT_needed_libs);
   opts::Notes = Args.hasArg(OPT_notes);
   opts::PrettyPrint = Args.hasArg(OPT_pretty_print);
@@ -473,6 +475,8 @@ static void dumpObject(ObjectFile &Obj, ScopedPrinter &Writer,
       Dumper->printAddrsig();
     if (opts::Notes)
       Dumper->printNotes();
+    if (opts::Memtag)
+      Dumper->printMemtag();
   }
   if (Obj.isCOFF()) {
     if (opts::COFFImports)
@@ -684,6 +688,7 @@ int llvm_readobj_main(int argc, char **argv, const llvm::ToolContext &) {
       opts::Addrsig = true;
       opts::PrintStackSizes = true;
     }
+    opts::Memtag = true;
   }
 
   if (opts::Headers) {
-- 
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