1 //===-- HexagonELFObjectWriter.cpp - Hexagon Target Descriptions ----------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "Hexagon.h"
11 #include "llvm/MC/MCAssembler.h"
12 #include "llvm/MC/MCELFObjectWriter.h"
13 #include "llvm/Support/Debug.h"
14
15 #define DEBUG_TYPE "hexagon-elf-writer"
16
17 using namespace llvm;
18 using namespace Hexagon;
19
20 namespace {
21
22 class HexagonELFObjectWriter : public MCELFObjectTargetWriter {
23 private:
24 StringRef CPU;
25
26 public:
27 HexagonELFObjectWriter(uint8_t OSABI, StringRef C);
28
29 virtual unsigned GetRelocType(MCValue const &Target, MCFixup const &Fixup,
30 bool IsPCRel) const override;
31 };
32 }
33
HexagonELFObjectWriter(uint8_t OSABI,StringRef C)34 HexagonELFObjectWriter::HexagonELFObjectWriter(uint8_t OSABI, StringRef C)
35 : MCELFObjectTargetWriter(/*Is64bit*/ false, OSABI, ELF::EM_HEXAGON,
36 /*HasRelocationAddend*/ true),
37 CPU(C) {}
38
GetRelocType(MCValue const &,MCFixup const & Fixup,bool IsPCRel) const39 unsigned HexagonELFObjectWriter::GetRelocType(MCValue const &/*Target*/,
40 MCFixup const &Fixup,
41 bool IsPCRel) const {
42 unsigned Type = (unsigned)ELF::R_HEX_NONE;
43 llvm::MCFixupKind Kind = Fixup.getKind();
44
45 switch (Kind) {
46 default:
47 DEBUG(dbgs() << "unrecognized relocation " << Fixup.getKind() << "\n");
48 llvm_unreachable("Unimplemented Fixup kind!");
49 break;
50 case FK_Data_4:
51 Type = (IsPCRel) ? ELF::R_HEX_32_PCREL : ELF::R_HEX_32;
52 break;
53 }
54 return Type;
55 }
56
createHexagonELFObjectWriter(raw_ostream & OS,uint8_t OSABI,StringRef CPU)57 MCObjectWriter *llvm::createHexagonELFObjectWriter(raw_ostream &OS,
58 uint8_t OSABI,
59 StringRef CPU) {
60 MCELFObjectTargetWriter *MOTW = new HexagonELFObjectWriter(OSABI, CPU);
61 return createELFObjectWriter(MOTW, OS, /*IsLittleEndian*/ true);
62 }