1 files changed, 136 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Object/MachOUniversal.cpp b/contrib/llvm/lib/Object/MachOUniversal.cpp
new file mode 100644
index 000000000000..a1c83b9b7f86
--- /dev/null
+++ b/contrib/llvm/lib/Object/MachOUniversal.cpp
@@ -0,0 +1,136 @@
+//===- MachOUniversal.cpp - Mach-O universal binary -------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the MachOUniversalBinary class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/MachOUniversal.h"
+#include "llvm/Object/Archive.h"
+#include "llvm/Object/MachO.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/MemoryBuffer.h"
+
+using namespace llvm;
+using namespace object;
+
+template<typename T>
+static void SwapStruct(T &Value);
+
+template<>
+void SwapStruct(MachO::fat_header &H) {
+  sys::swapByteOrder(H.magic);
+  sys::swapByteOrder(H.nfat_arch);
+}
+
+template<>
+void SwapStruct(MachO::fat_arch &H) {
+  sys::swapByteOrder(H.cputype);
+  sys::swapByteOrder(H.cpusubtype);
+  sys::swapByteOrder(H.offset);
+  sys::swapByteOrder(H.size);
+  sys::swapByteOrder(H.align);
+}
+
+template<typename T>
+static T getUniversalBinaryStruct(const char *Ptr) {
+  T Res;
+  memcpy(&Res, Ptr, sizeof(T));
+  // Universal binary headers have big-endian byte order.
+  if (sys::IsLittleEndianHost)
+    SwapStruct(Res);
+  return Res;
+}
+
+MachOUniversalBinary::ObjectForArch::ObjectForArch(
+    const MachOUniversalBinary *Parent, uint32_t Index)
+    : Parent(Parent), Index(Index) {
+  if (!Parent || Index >= Parent->getNumberOfObjects()) {
+    clear();
+  } else {
+    // Parse object header.
+    StringRef ParentData = Parent->getData();
+    const char *HeaderPos = ParentData.begin() + sizeof(MachO::fat_header) +
+                            Index * sizeof(MachO::fat_arch);
+    Header = getUniversalBinaryStruct<MachO::fat_arch>(HeaderPos);
+    if (ParentData.size() < Header.offset + Header.size) {
+      clear();
+    }
+  }
+}
+
+ErrorOr<std::unique_ptr<MachOObjectFile>>
+MachOUniversalBinary::ObjectForArch::getAsObjectFile() const {
+  if (!Parent)
+    return object_error::parse_failed;
+
+  StringRef ParentData = Parent->getData();
+  StringRef ObjectData = ParentData.substr(Header.offset, Header.size);
+  StringRef ObjectName = Parent->getFileName();
+  MemoryBufferRef ObjBuffer(ObjectData, ObjectName);
+  return ObjectFile::createMachOObjectFile(ObjBuffer);
+}
+
+ErrorOr<std::unique_ptr<Archive>>
+MachOUniversalBinary::ObjectForArch::getAsArchive() const {
+  if (!Parent)
+    return object_error::parse_failed;
+
+  StringRef ParentData = Parent->getData();
+  StringRef ObjectData = ParentData.substr(Header.offset, Header.size);
+  StringRef ObjectName = Parent->getFileName();
+  MemoryBufferRef ObjBuffer(ObjectData, ObjectName);
+  return Archive::create(ObjBuffer);
+}
+
+void MachOUniversalBinary::anchor() { }
+
+ErrorOr<std::unique_ptr<MachOUniversalBinary>>
+MachOUniversalBinary::create(MemoryBufferRef Source) {
+  std::error_code EC;
+  std::unique_ptr<MachOUniversalBinary> Ret(
+      new MachOUniversalBinary(Source, EC));
+  if (EC)
+    return EC;
+  return std::move(Ret);
+}
+
+MachOUniversalBinary::MachOUniversalBinary(MemoryBufferRef Source,
+                                           std::error_code &ec)
+    : Binary(Binary::ID_MachOUniversalBinary, Source), NumberOfObjects(0) {
+  if (Data.getBufferSize() < sizeof(MachO::fat_header)) {
+    ec = object_error::invalid_file_type;
+    return;
+  }
+  // Check for magic value and sufficient header size.
+  StringRef Buf = getData();
+  MachO::fat_header H= getUniversalBinaryStruct<MachO::fat_header>(Buf.begin());
+  NumberOfObjects = H.nfat_arch;
+  uint32_t MinSize = sizeof(MachO::fat_header) +
+                     sizeof(MachO::fat_arch) * NumberOfObjects;
+  if (H.magic != MachO::FAT_MAGIC || Buf.size() < MinSize) {
+    ec = object_error::parse_failed;
+    return;
+  }
+  ec = std::error_code();
+}
+
+ErrorOr<std::unique_ptr<MachOObjectFile>>
+MachOUniversalBinary::getObjectForArch(StringRef ArchName) const {
+  if (Triple(ArchName).getArch() == Triple::ArchType::UnknownArch)
+    return object_error::arch_not_found;
+
+  for (object_iterator I = begin_objects(), E = end_objects(); I != E; ++I) {
+    if (I->getArchTypeName() == ArchName)
+      return I->getAsObjectFile();
+  }
+  return object_error::arch_not_found;
+}