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 "llvm/MC/MCELFObjectWriter.h"
13#include "llvm/MC/MCFixup.h"
14#include "llvm/MC/MCObjectWriter.h"
15#include "llvm/MC/MCValue.h"
16#include "llvm/Support/ErrorHandling.h"
17
18using namespace llvm;
19
20namespace {
21class MSP430ELFObjectWriter : public MCELFObjectTargetWriter {
22public:
23 MSP430ELFObjectWriter(uint8_t OSABI)
24 : MCELFObjectTargetWriter(false, OSABI, ELF::EM_MSP430,
25 /*HasRelocationAddend*/ true) {}
26
27 ~MSP430ELFObjectWriter() override = default;
28
29protected:
30 unsigned getRelocType(const MCFixup &Fixup, const MCValue &,
31 bool IsPCRel) const override {
32 // Translate fixup kind to ELF relocation type.
33 switch (Fixup.getTargetKind()) {
34 case FK_Data_1: return ELF::R_MSP430_8;
35 case FK_Data_2: return ELF::R_MSP430_16_BYTE;
36 case FK_Data_4: return ELF::R_MSP430_32;
37 case MSP430::fixup_32: return ELF::R_MSP430_32;
38 case MSP430::fixup_10_pcrel: return ELF::R_MSP430_10_PCREL;
39 case MSP430::fixup_16: return ELF::R_MSP430_16;
40 case MSP430::fixup_16_pcrel: return ELF::R_MSP430_16_PCREL;
41 case MSP430::fixup_16_byte: return ELF::R_MSP430_16_BYTE;
42 case MSP430::fixup_16_pcrel_byte: return ELF::R_MSP430_16_PCREL_BYTE;
43 case MSP430::fixup_2x_pcrel: return ELF::R_MSP430_2X_PCREL;
44 case MSP430::fixup_rl_pcrel: return ELF::R_MSP430_RL_PCREL;
45 case MSP430::fixup_8: return ELF::R_MSP430_8;
46 case MSP430::fixup_sym_diff: return ELF::R_MSP430_SYM_DIFF;
47 default:
48 llvm_unreachable("Invalid fixup kind");
49 }
50 }
51};
52} // end of anonymous namespace
53
54std::unique_ptr<MCObjectTargetWriter>
55llvm::createMSP430ELFObjectWriter(uint8_t OSABI) {
56 return std::make_unique<MSP430ELFObjectWriter>(args&: OSABI);
57}
58