vendor/llvm-project/llvmorg-15-init-15358-g53dc0f107877

1 files changed, 64 insertions, 0 deletions

diff --git a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchELFObjectWriter.cpp b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchELFObjectWriter.cpp
new file mode 100644
index 000000000000..95e1314f363a
--- /dev/null
+++ b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchELFObjectWriter.cpp
@@ -0,0 +1,64 @@
+//===-- LoongArchELFObjectWriter.cpp - LoongArch ELF Writer ---*- C++ -*---===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/LoongArchMCTargetDesc.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCELFObjectWriter.h"
+#include "llvm/MC/MCFixup.h"
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/Support/ErrorHandling.h"
+
+using namespace llvm;
+
+namespace {
+class LoongArchELFObjectWriter : public MCELFObjectTargetWriter {
+public:
+  LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit);
+
+  ~LoongArchELFObjectWriter() override;
+
+  // Return true if the given relocation must be with a symbol rather than
+  // section plus offset.
+  bool needsRelocateWithSymbol(const MCSymbol &Sym,
+                               unsigned Type) const override {
+    return true;
+  }
+
+protected:
+  unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
+                        const MCFixup &Fixup, bool IsPCRel) const override;
+};
+} // namespace
+
+LoongArchELFObjectWriter::LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit)
+    : MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_LOONGARCH,
+                              /*HasRelocationAddend*/ true) {}
+
+LoongArchELFObjectWriter::~LoongArchELFObjectWriter() {}
+
+unsigned LoongArchELFObjectWriter::getRelocType(MCContext &Ctx,
+                                                const MCValue &Target,
+                                                const MCFixup &Fixup,
+                                                bool IsPCRel) const {
+  // Determine the type of the relocation
+  unsigned Kind = Fixup.getTargetKind();
+
+  if (Kind >= FirstLiteralRelocationKind)
+    return Kind - FirstLiteralRelocationKind;
+
+  switch (Kind) {
+  // TODO: Implement this when we defined fixup kind.
+  default:
+    return ELF::R_LARCH_NONE;
+  }
+}
+
+std::unique_ptr<MCObjectTargetWriter>
+llvm::createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit) {
+  return std::make_unique<LoongArchELFObjectWriter>(OSABI, Is64Bit);
+}