From 7ab20090242a84ebba3afa25973fda03be5f2a7e Mon Sep 17 00:00:00 2001
From: Davide Italiano <davide@freebsd.org>
Date: Thu, 3 Sep 2015 18:10:28 +0000
Subject: [PATCH] [llvm-readobj] Dump MachO indirect symbols.

Example output:

File: <stdin>
Format: Mach-O 32-bit i386
Arch: i386
AddressSize: 32bit
Indirect Symbols {

Number: 3
Symbols [
  Entry {
    Entry Index: 0
    Symbol Index: 0x4
  }
  Entry {
    Entry Index: 1
    Symbol Index: 0x0
  }
  Entry {
    Entry Index: 2
    Symbol Index: 0x1
  }
]
}

Differential Revision:	http://reviews.llvm.org/D12570


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246789 91177308-0d34-0410-b5e6-96231b3b80d8
---
 tools/llvm-readobj/MachODumper.cpp  | 17 +++++++++++++++++
 tools/llvm-readobj/ObjDumper.h      |  1 +
 tools/llvm-readobj/llvm-readobj.cpp |  7 +++++++
 3 files changed, 25 insertions(+)

diff --git a/tools/llvm-readobj/MachODumper.cpp b/tools/llvm-readobj/MachODumper.cpp
index a7c5d23b7e4..80c45dee3cc 100644
--- a/tools/llvm-readobj/MachODumper.cpp
+++ b/tools/llvm-readobj/MachODumper.cpp
@@ -45,6 +45,7 @@ public:
   void printMachOVersionMin() override;
   void printMachODysymtab() override;
   void printMachOSegment() override;
+  void printMachOIndirectSymbols() override;
 
 private:
   template<class MachHeader>
@@ -774,3 +775,19 @@ void MachODumper::printMachOSegment() {
     }
   }
 }
+
+void MachODumper::printMachOIndirectSymbols() {
+  for (const auto &Load : Obj->load_commands()) {
+    if (Load.C.cmd == MachO::LC_DYSYMTAB) {
+      MachO::dysymtab_command DLC = Obj->getDysymtabLoadCommand();
+      DictScope Group(W, "Indirect Symbols");
+      W.printNumber("Number", DLC.nindirectsyms);
+      ListScope D(W, "Symbols");
+      for (unsigned i = 0; i < DLC.nindirectsyms; ++i) {
+        DictScope Group(W, "Entry");
+        W.printNumber("Entry Index", i);
+        W.printHex("Symbol Index", Obj->getIndirectSymbolTableEntry(DLC, i));
+      }
+    }
+  }
+}
diff --git a/tools/llvm-readobj/ObjDumper.h b/tools/llvm-readobj/ObjDumper.h
index 5fea403322d..65015213201 100644
--- a/tools/llvm-readobj/ObjDumper.h
+++ b/tools/llvm-readobj/ObjDumper.h
@@ -60,6 +60,7 @@ public:
   virtual void printMachOVersionMin() { }
   virtual void printMachODysymtab() { }
   virtual void printMachOSegment() { }
+  virtual void printMachOIndirectSymbols() { }
 
   virtual void printStackMap() const = 0;
 
diff --git a/tools/llvm-readobj/llvm-readobj.cpp b/tools/llvm-readobj/llvm-readobj.cpp
index f63bc81002f..2e17525ab71 100644
--- a/tools/llvm-readobj/llvm-readobj.cpp
+++ b/tools/llvm-readobj/llvm-readobj.cpp
@@ -187,6 +187,11 @@ namespace opts {
   MachODataInCode("macho-data-in-code",
                   cl::desc("Display MachO Data in Code command"));
 
+  // -macho-indirect-symbols
+  cl::opt<bool>
+  MachOIndirectSymbols("macho-indirect-symbols",
+                  cl::desc("Display MachO indirect symbols"));
+
   // -macho-segment
   cl::opt<bool>
   MachOSegment("macho-segment",
@@ -336,6 +341,8 @@ static void dumpObject(const ObjectFile *Obj) {
   if (Obj->isMachO()) {
     if (opts::MachODataInCode)
       Dumper->printMachODataInCode();
+    if (opts::MachOIndirectSymbols)
+      Dumper->printMachOIndirectSymbols();
     if (opts::MachOSegment)
       Dumper->printMachOSegment();
     if (opts::MachOVersionMin)
-- 
2.11.0