From 6f326ce75bc6424d1e01bbae525323bc5a57f2c8 Mon Sep 17 00:00:00 2001
From: Kevin Enderby <enderby@apple.com>
Date: Thu, 23 Oct 2014 19:37:31 +0000
Subject: =?UTF-8?q?Update=20llvm-objdump=E2=80=99s=20Mach-O=20symbolizer?=
 =?UTF-8?q?=20code=20for=20Objective-C=20references.?=
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This prints disassembly comments for Objective-C references to CFStrings,
Selectors, Classes and method calls.

llvm-svn: 220500
---
 llvm/lib/Object/MachOObjectFile.cpp | 40 +++++++++++++++++++++++++++++++++++--
 1 file changed, 38 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/Object/MachOObjectFile.cpp')

diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index 6e83d81..0bd61ce 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -2345,11 +2345,47 @@ MachOObjectFile::getDataInCodeTableEntry(uint32_t DataOffset,
 }
 
 MachO::symtab_command MachOObjectFile::getSymtabLoadCommand() const {
-  return getStruct<MachO::symtab_command>(this, SymtabLoadCmd);
+  if (SymtabLoadCmd)
+    return getStruct<MachO::symtab_command>(this, SymtabLoadCmd);
+
+  // If there is no SymtabLoadCmd return a load command with zero'ed fields.
+  MachO::symtab_command Cmd;
+  Cmd.cmd = MachO::LC_SYMTAB;
+  Cmd.cmdsize = sizeof(MachO::symtab_command);
+  Cmd.symoff = 0;
+  Cmd.nsyms = 0;
+  Cmd.stroff = 0;
+  Cmd.strsize = 0;
+  return Cmd;
 }
 
 MachO::dysymtab_command MachOObjectFile::getDysymtabLoadCommand() const {
-  return getStruct<MachO::dysymtab_command>(this, DysymtabLoadCmd);
+  if (DysymtabLoadCmd)
+    return getStruct<MachO::dysymtab_command>(this, DysymtabLoadCmd);
+
+  // If there is no DysymtabLoadCmd return a load command with zero'ed fields.
+  MachO::dysymtab_command Cmd;
+  Cmd.cmd = MachO::LC_DYSYMTAB;
+  Cmd.cmdsize = sizeof(MachO::dysymtab_command);
+  Cmd.ilocalsym = 0;
+  Cmd.nlocalsym = 0;
+  Cmd.iextdefsym = 0;
+  Cmd.nextdefsym = 0;
+  Cmd.iundefsym = 0;
+  Cmd.nundefsym = 0;
+  Cmd.tocoff = 0;
+  Cmd.ntoc = 0;
+  Cmd.modtaboff = 0;
+  Cmd.nmodtab = 0;
+  Cmd.extrefsymoff = 0;
+  Cmd.nextrefsyms = 0;
+  Cmd.indirectsymoff = 0;
+  Cmd.nindirectsyms = 0;
+  Cmd.extreloff = 0;
+  Cmd.nextrel = 0;
+  Cmd.locreloff = 0;
+  Cmd.nlocrel = 0;
+  return Cmd;
 }
 
 MachO::linkedit_data_command
-- 
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