1 files changed, 95 insertions, 0 deletions
diff --git a/llvm/lib/Target/Lanai/MCTargetDesc/LanaiELFObjectWriter.cpp b/llvm/lib/Target/Lanai/MCTargetDesc/LanaiELFObjectWriter.cpp
new file mode 100644
index 00000000000..d11eb0ab81d
--- /dev/null
+++ b/llvm/lib/Target/Lanai/MCTargetDesc/LanaiELFObjectWriter.cpp
@@ -0,0 +1,95 @@
+//===-- LanaiELFObjectWriter.cpp - Lanai ELF Writer -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/LanaiBaseInfo.h"
+#include "MCTargetDesc/LanaiFixupKinds.h"
+#include "MCTargetDesc/LanaiMCTargetDesc.h"
+#include "llvm/MC/MCELFObjectWriter.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+namespace {
+class LanaiELFObjectWriter : public MCELFObjectTargetWriter {
+public:
+  explicit LanaiELFObjectWriter(uint8_t OSABI);
+
+  ~LanaiELFObjectWriter() override;
+
+protected:
+  unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
+                        const MCFixup &Fixup, bool IsPCRel) const override;
+  bool needsRelocateWithSymbol(const MCSymbol &SD,
+                               unsigned Type) const override;
+};
+} // namespace
+
+LanaiELFObjectWriter::LanaiELFObjectWriter(uint8_t OSABI)
+    : MCELFObjectTargetWriter(/*Is64Bit=*/false, OSABI, ELF::EM_LANAI,
+                              /*HasRelocationAddend=*/true) {}
+
+LanaiELFObjectWriter::~LanaiELFObjectWriter() {}
+
+unsigned LanaiELFObjectWriter::getRelocType(MCContext &Ctx,
+                                            const MCValue &Target,
+                                            const MCFixup &Fixup,
+                                            bool IsPCRel) const {
+  unsigned Type;
+  unsigned Kind = static_cast<unsigned>(Fixup.getKind());
+  switch (Kind) {
+  case Lanai::FIXUP_LANAI_21:
+    Type = ELF::R_LANAI_21;
+    break;
+  case Lanai::FIXUP_LANAI_21_F:
+    Type = ELF::R_LANAI_21_F;
+    break;
+  case Lanai::FIXUP_LANAI_25:
+    Type = ELF::R_LANAI_25;
+    break;
+  case Lanai::FIXUP_LANAI_32:
+  case FK_Data_4:
+    Type = ELF::R_LANAI_32;
+    break;
+  case Lanai::FIXUP_LANAI_HI16:
+    Type = ELF::R_LANAI_HI16;
+    break;
+  case Lanai::FIXUP_LANAI_LO16:
+    Type = ELF::R_LANAI_LO16;
+    break;
+  case Lanai::FIXUP_LANAI_NONE:
+    Type = ELF::R_LANAI_NONE;
+    break;
+
+  default:
+    llvm_unreachable("Invalid fixup kind!");
+  }
+  return Type;
+}
+
+bool LanaiELFObjectWriter::needsRelocateWithSymbol(const MCSymbol &SD,
+                                                   unsigned Type) const {
+  switch (Type) {
+  case ELF::R_LANAI_21:
+  case ELF::R_LANAI_21_F:
+  case ELF::R_LANAI_25:
+  case ELF::R_LANAI_32:
+  case ELF::R_LANAI_HI16:
+    return true;
+  default:
+    return false;
+  }
+}
+
+MCObjectWriter *llvm::createLanaiELFObjectWriter(raw_pwrite_stream &OS,
+                                                 uint8_t OSABI) {
+  MCELFObjectTargetWriter *MOTW = new LanaiELFObjectWriter(OSABI);
+  return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);
+}