xref: /freebsd/contrib/llvm-project/llvm/lib/Target/MSP430/MCTargetDesc/MSP430ELFObjectWriter.cpp (revision 6966ac055c3b7a39266fb982493330df7a097997)
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 
19 using namespace llvm;
20 
21 namespace {
22 class MSP430ELFObjectWriter : public MCELFObjectTargetWriter {
23 public:
24   MSP430ELFObjectWriter(uint8_t OSABI)
25     : MCELFObjectTargetWriter(false, OSABI, ELF::EM_MSP430,
26                               /*HasRelocationAddend*/ true) {}
27 
28   ~MSP430ELFObjectWriter() override {}
29 
30 protected:
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 ((unsigned)Fixup.getKind()) {
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 
55 std::unique_ptr<MCObjectTargetWriter>
56 llvm::createMSP430ELFObjectWriter(uint8_t OSABI) {
57   return llvm::make_unique<MSP430ELFObjectWriter>(OSABI);
58 }
59