1//===-- MSP430ELFObjectWriter.cpp - MSP430 ELF Writer ---------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "MCTargetDesc/MSP430FixupKinds.h"
10#include "MCTargetDesc/MSP430MCTargetDesc.h"
11
12#include "MCTargetDesc/MSP430MCTargetDesc.h"
13#include "llvm/MC/MCELFObjectWriter.h"
14#include "llvm/MC/MCFixup.h"
15#include "llvm/MC/MCObjectWriter.h"
16#include "llvm/MC/MCValue.h"
17#include "llvm/Support/ErrorHandling.h"
18
19using namespace llvm;
20
21namespace {
22class MSP430ELFObjectWriter : public MCELFObjectTargetWriter {
23public:
24  MSP430ELFObjectWriter(uint8_t OSABI)
25    : MCELFObjectTargetWriter(false, OSABI, ELF::EM_MSP430,
26                              /*HasRelocationAddend*/ true) {}
27
28  ~MSP430ELFObjectWriter() override {}
29
30protected:
31  unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
32                        const MCFixup &Fixup, bool IsPCRel) const override {
33    // Translate fixup kind to ELF relocation type.
34    switch (Fixup.getTargetKind()) {
35    case FK_Data_1:                   return ELF::R_MSP430_8;
36    case FK_Data_2:                   return ELF::R_MSP430_16_BYTE;
37    case FK_Data_4:                   return ELF::R_MSP430_32;
38    case MSP430::fixup_32:            return ELF::R_MSP430_32;
39    case MSP430::fixup_10_pcrel:      return ELF::R_MSP430_10_PCREL;
40    case MSP430::fixup_16:            return ELF::R_MSP430_16;
41    case MSP430::fixup_16_pcrel:      return ELF::R_MSP430_16_PCREL;
42    case MSP430::fixup_16_byte:       return ELF::R_MSP430_16_BYTE;
43    case MSP430::fixup_16_pcrel_byte: return ELF::R_MSP430_16_PCREL_BYTE;
44    case MSP430::fixup_2x_pcrel:      return ELF::R_MSP430_2X_PCREL;
45    case MSP430::fixup_rl_pcrel:      return ELF::R_MSP430_RL_PCREL;
46    case MSP430::fixup_8:             return ELF::R_MSP430_8;
47    case MSP430::fixup_sym_diff:      return ELF::R_MSP430_SYM_DIFF;
48    default:
49      llvm_unreachable("Invalid fixup kind");
50    }
51  }
52};
53} // end of anonymous namespace
54
55std::unique_ptr<MCObjectTargetWriter>
56llvm::createMSP430ELFObjectWriter(uint8_t OSABI) {
57  return std::make_unique<MSP430ELFObjectWriter>(OSABI);
58}
59