1 files changed, 125 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Object/ELFObjectFile.cpp b/contrib/llvm/lib/Object/ELFObjectFile.cpp
new file mode 100644
index 000000000000..4bd69e34e3c3
--- /dev/null
+++ b/contrib/llvm/lib/Object/ELFObjectFile.cpp
@@ -0,0 +1,125 @@
+//===- ELFObjectFile.cpp - ELF object file implementation -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Part of the ELFObjectFile class implementation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ELFObjectFile.h"
+#include "llvm/Support/MathExtras.h"
+
+namespace llvm {
+using namespace object;
+
+ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source)
+    : ObjectFile(Type, Source) {}
+
+ErrorOr<std::unique_ptr<ObjectFile>>
+ObjectFile::createELFObjectFile(MemoryBufferRef Obj) {
+  std::pair<unsigned char, unsigned char> Ident =
+      getElfArchType(Obj.getBuffer());
+  std::size_t MaxAlignment =
+      1ULL << countTrailingZeros(uintptr_t(Obj.getBufferStart()));
+
+  if (MaxAlignment < 2)
+    return object_error::parse_failed;
+
+  std::error_code EC;
+  std::unique_ptr<ObjectFile> R;
+  if (Ident.first == ELF::ELFCLASS32) {
+    if (Ident.second == ELF::ELFDATA2LSB)
+      R.reset(new ELFObjectFile<ELFType<support::little, false>>(Obj, EC));
+    else if (Ident.second == ELF::ELFDATA2MSB)
+      R.reset(new ELFObjectFile<ELFType<support::big, false>>(Obj, EC));
+    else
+      return object_error::parse_failed;
+  } else if (Ident.first == ELF::ELFCLASS64) {
+    if (Ident.second == ELF::ELFDATA2LSB)
+      R.reset(new ELFObjectFile<ELFType<support::little, true>>(Obj, EC));
+    else if (Ident.second == ELF::ELFDATA2MSB)
+      R.reset(new ELFObjectFile<ELFType<support::big, true>>(Obj, EC));
+    else
+      return object_error::parse_failed;
+  } else {
+    return object_error::parse_failed;
+  }
+
+  if (EC)
+    return EC;
+  return std::move(R);
+}
+
+SubtargetFeatures ELFObjectFileBase::getFeatures() const {
+  switch (getEMachine()) {
+  case ELF::EM_MIPS: {
+    SubtargetFeatures Features;
+    unsigned PlatformFlags;
+    getPlatformFlags(PlatformFlags);
+
+    switch (PlatformFlags & ELF::EF_MIPS_ARCH) {
+    case ELF::EF_MIPS_ARCH_1:
+      break;
+    case ELF::EF_MIPS_ARCH_2:
+      Features.AddFeature("mips2");
+      break;
+    case ELF::EF_MIPS_ARCH_3:
+      Features.AddFeature("mips3");
+      break;
+    case ELF::EF_MIPS_ARCH_4:
+      Features.AddFeature("mips4");
+      break;
+    case ELF::EF_MIPS_ARCH_5:
+      Features.AddFeature("mips5");
+      break;
+    case ELF::EF_MIPS_ARCH_32:
+      Features.AddFeature("mips32");
+      break;
+    case ELF::EF_MIPS_ARCH_64:
+      Features.AddFeature("mips64");
+      break;
+    case ELF::EF_MIPS_ARCH_32R2:
+      Features.AddFeature("mips32r2");
+      break;
+    case ELF::EF_MIPS_ARCH_64R2:
+      Features.AddFeature("mips64r2");
+      break;
+    case ELF::EF_MIPS_ARCH_32R6:
+      Features.AddFeature("mips32r6");
+      break;
+    case ELF::EF_MIPS_ARCH_64R6:
+      Features.AddFeature("mips64r6");
+      break;
+    default:
+      llvm_unreachable("Unknown EF_MIPS_ARCH value");
+    }
+
+    switch (PlatformFlags & ELF::EF_MIPS_MACH) {
+    case ELF::EF_MIPS_MACH_NONE:
+      // No feature associated with this value.
+      break;
+    case ELF::EF_MIPS_MACH_OCTEON:
+      Features.AddFeature("cnmips");
+      break;
+    default:
+      llvm_unreachable("Unknown EF_MIPS_ARCH value");
+    }
+
+    if (PlatformFlags & ELF::EF_MIPS_ARCH_ASE_M16)
+      Features.AddFeature("mips16");
+    if (PlatformFlags & ELF::EF_MIPS_MICROMIPS)
+      Features.AddFeature("micromips");
+
+    return Features;
+  }
+  default:
+    return SubtargetFeatures();
+  }
+}
+
+} // end namespace llvm