[AIX][XCOFF] parsing xcoff object file auxiliary header

Summary:

The patch supports parsing the xcoff object file auxiliary header with llvm-readobj with option "auxiliary-headers"

the format of auxiliary header as
https://www.ibm.com/support/knowledgecenter/en/ssw_aix_72/filesreference/XCOFF.html#XCOFF__fyovh386shar

Reviewers: James Henderson, Jason Liu, Hubert Tong, Esme yi, Sean Fertile.

Differential Revision: https://reviews.llvm.org/D82549

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/tools/llvm-readobj/llvm-readobj.cpp b/llvm/tools/llvm-readobj/llvm-readobj.cpp
index 001dace..a598e2c 100644
--- a/llvm/tools/llvm-readobj/llvm-readobj.cpp
+++ b/llvm/tools/llvm-readobj/llvm-readobj.cpp
@@ -149,6 +149,9 @@ static bool COFFLoadConfig;
 static bool COFFResources;
 static bool COFFTLSDirectory;
 
+// XCOFF specific options.
+static bool XCOFFAuxiliaryHeader;
+
 OutputStyleTy Output = OutputStyleTy::LLVM;
 static std::vector<std::string> InputFilenames;
 } // namespace opts
@@ -268,6 +271,9 @@ static void parseOptions(const opt::InputArgList &Args) {
   opts::COFFResources = Args.hasArg(OPT_coff_resources);
   opts::COFFTLSDirectory = Args.hasArg(OPT_coff_tls_directory);
 
+  // XCOFF specific options.
+  opts::XCOFFAuxiliaryHeader = Args.hasArg(OPT_auxiliary_header);
+
   opts::InputFilenames = Args.getAllArgValues(OPT_INPUT);
 }
 
@@ -343,6 +349,9 @@ static void dumpObject(ObjectFile &Obj, ScopedPrinter &Writer,
   if (opts::FileHeaders)
     Dumper->printFileHeaders();
 
+  if (Obj.isXCOFF() && opts::XCOFFAuxiliaryHeader)
+    Dumper->printAuxiliaryHeader();
+
   // This is only used for ELF currently. In some cases, when an object is
   // corrupt (e.g. truncated), we can't dump anything except the file header.
   if (!ContentErrString.empty())
@@ -577,6 +586,7 @@ int main(int argc, char *argv[]) {
 
   if (opts::All) {
     opts::FileHeaders = true;
+    opts::XCOFFAuxiliaryHeader = true;
     opts::ProgramHeaders = true;
     opts::SectionHeaders = true;
     opts::Symbols = true;
@@ -595,6 +605,7 @@ int main(int argc, char *argv[]) {
 
   if (opts::Headers) {
     opts::FileHeaders = true;
+    opts::XCOFFAuxiliaryHeader = true;
     opts::ProgramHeaders = true;
     opts::SectionHeaders = true;
   }