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 #include "llvm/Support/raw_ostream.h"
15
16 #define DEBUG_TYPE "hexagon-elf-writer"
17
18 using namespace llvm;
19 using namespace Hexagon;
20
21 namespace {
22
23 class HexagonELFObjectWriter : public MCELFObjectTargetWriter {
24 private:
25 StringRef CPU;
26
27 public:
28 HexagonELFObjectWriter(uint8_t OSABI, StringRef C);
29
30 unsigned GetRelocType(MCValue const &Target, MCFixup const &Fixup,
31 bool IsPCRel) const override;
32 };
33 }
34
HexagonELFObjectWriter(uint8_t OSABI,StringRef C)35 HexagonELFObjectWriter::HexagonELFObjectWriter(uint8_t OSABI, StringRef C)
36 : MCELFObjectTargetWriter(/*Is64bit*/ false, OSABI, ELF::EM_HEXAGON,
37 /*HasRelocationAddend*/ true),
38 CPU(C) {}
39
GetRelocType(MCValue const &,MCFixup const & Fixup,bool IsPCRel) const40 unsigned HexagonELFObjectWriter::GetRelocType(MCValue const &/*Target*/,
41 MCFixup const &Fixup,
42 bool IsPCRel) const {
43 unsigned Type = (unsigned)ELF::R_HEX_NONE;
44 llvm::MCFixupKind Kind = Fixup.getKind();
45
46 switch (Kind) {
47 default:
48 DEBUG(dbgs() << "unrecognized relocation " << Fixup.getKind() << "\n");
49 llvm_unreachable("Unimplemented Fixup kind!");
50 break;
51 case FK_Data_4:
52 Type = (IsPCRel) ? ELF::R_HEX_32_PCREL : ELF::R_HEX_32;
53 break;
54 }
55 return Type;
56 }
57
createHexagonELFObjectWriter(raw_pwrite_stream & OS,uint8_t OSABI,StringRef CPU)58 MCObjectWriter *llvm::createHexagonELFObjectWriter(raw_pwrite_stream &OS,
59 uint8_t OSABI,
60 StringRef CPU) {
61 MCELFObjectTargetWriter *MOTW = new HexagonELFObjectWriter(OSABI, CPU);
62 return createELFObjectWriter(MOTW, OS, /*IsLittleEndian*/ true);
63 }
64