1//===-- SparcELFObjectWriter.cpp - Sparc ELF Writer -----------------------===//
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 "MCTargetDesc/SparcFixupKinds.h"
11#include "MCTargetDesc/SparcMCExpr.h"
12#include "MCTargetDesc/SparcMCTargetDesc.h"
13#include "llvm/ADT/STLExtras.h"
14#include "llvm/MC/MCELFObjectWriter.h"
15#include "llvm/MC/MCExpr.h"
16#include "llvm/MC/MCValue.h"
17#include "llvm/Support/ErrorHandling.h"
18
19using namespace llvm;
20
21namespace {
22  class SparcELFObjectWriter : public MCELFObjectTargetWriter {
23  public:
24    SparcELFObjectWriter(bool Is64Bit, uint8_t OSABI)
25      : MCELFObjectTargetWriter(Is64Bit, OSABI,
26                                Is64Bit ?  ELF::EM_SPARCV9 : ELF::EM_SPARC,
27                                /*HasRelocationAddend*/ true) {}
28
29    ~SparcELFObjectWriter() override {}
30
31  protected:
32    unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
33                          bool IsPCRel) const override;
34  };
35}
36
37unsigned SparcELFObjectWriter::GetRelocType(const MCValue &Target,
38                                            const MCFixup &Fixup,
39                                            bool IsPCRel) const {
40
41  if (const SparcMCExpr *SExpr = dyn_cast<SparcMCExpr>(Fixup.getValue())) {
42    if (SExpr->getKind() == SparcMCExpr::VK_Sparc_R_DISP32)
43      return ELF::R_SPARC_DISP32;
44  }
45
46  if (IsPCRel) {
47    switch((unsigned)Fixup.getKind()) {
48    default:
49      llvm_unreachable("Unimplemented fixup -> relocation");
50    case FK_Data_1:                  return ELF::R_SPARC_DISP8;
51    case FK_Data_2:                  return ELF::R_SPARC_DISP16;
52    case FK_Data_4:                  return ELF::R_SPARC_DISP32;
53    case FK_Data_8:                  return ELF::R_SPARC_DISP64;
54    case Sparc::fixup_sparc_call30:  return ELF::R_SPARC_WDISP30;
55    case Sparc::fixup_sparc_br22:    return ELF::R_SPARC_WDISP22;
56    case Sparc::fixup_sparc_br19:    return ELF::R_SPARC_WDISP19;
57    case Sparc::fixup_sparc_pc22:    return ELF::R_SPARC_PC22;
58    case Sparc::fixup_sparc_pc10:    return ELF::R_SPARC_PC10;
59    case Sparc::fixup_sparc_wplt30:  return ELF::R_SPARC_WPLT30;
60    }
61  }
62
63  switch((unsigned)Fixup.getKind()) {
64  default:
65    llvm_unreachable("Unimplemented fixup -> relocation");
66  case FK_Data_1:                return ELF::R_SPARC_8;
67  case FK_Data_2:                return ((Fixup.getOffset() % 2)
68                                         ? ELF::R_SPARC_UA16
69                                         : ELF::R_SPARC_16);
70  case FK_Data_4:                return ((Fixup.getOffset() % 4)
71                                         ? ELF::R_SPARC_UA32
72                                         : ELF::R_SPARC_32);
73  case FK_Data_8:                return ((Fixup.getOffset() % 8)
74                                         ? ELF::R_SPARC_UA64
75                                         : ELF::R_SPARC_64);
76  case Sparc::fixup_sparc_hi22:  return ELF::R_SPARC_HI22;
77  case Sparc::fixup_sparc_lo10:  return ELF::R_SPARC_LO10;
78  case Sparc::fixup_sparc_h44:   return ELF::R_SPARC_H44;
79  case Sparc::fixup_sparc_m44:   return ELF::R_SPARC_M44;
80  case Sparc::fixup_sparc_l44:   return ELF::R_SPARC_L44;
81  case Sparc::fixup_sparc_hh:    return ELF::R_SPARC_HH22;
82  case Sparc::fixup_sparc_hm:    return ELF::R_SPARC_HM10;
83  case Sparc::fixup_sparc_got22: return ELF::R_SPARC_GOT22;
84  case Sparc::fixup_sparc_got10: return ELF::R_SPARC_GOT10;
85  case Sparc::fixup_sparc_tls_gd_hi22:   return ELF::R_SPARC_TLS_GD_HI22;
86  case Sparc::fixup_sparc_tls_gd_lo10:   return ELF::R_SPARC_TLS_GD_LO10;
87  case Sparc::fixup_sparc_tls_gd_add:    return ELF::R_SPARC_TLS_GD_ADD;
88  case Sparc::fixup_sparc_tls_gd_call:   return ELF::R_SPARC_TLS_GD_CALL;
89  case Sparc::fixup_sparc_tls_ldm_hi22:  return ELF::R_SPARC_TLS_LDM_HI22;
90  case Sparc::fixup_sparc_tls_ldm_lo10:  return ELF::R_SPARC_TLS_LDM_LO10;
91  case Sparc::fixup_sparc_tls_ldm_add:   return ELF::R_SPARC_TLS_LDM_ADD;
92  case Sparc::fixup_sparc_tls_ldm_call:  return ELF::R_SPARC_TLS_LDM_CALL;
93  case Sparc::fixup_sparc_tls_ldo_hix22: return ELF::R_SPARC_TLS_LDO_HIX22;
94  case Sparc::fixup_sparc_tls_ldo_lox10: return ELF::R_SPARC_TLS_LDO_LOX10;
95  case Sparc::fixup_sparc_tls_ldo_add:   return ELF::R_SPARC_TLS_LDO_ADD;
96  case Sparc::fixup_sparc_tls_ie_hi22:   return ELF::R_SPARC_TLS_IE_HI22;
97  case Sparc::fixup_sparc_tls_ie_lo10:   return ELF::R_SPARC_TLS_IE_LO10;
98  case Sparc::fixup_sparc_tls_ie_ld:     return ELF::R_SPARC_TLS_IE_LD;
99  case Sparc::fixup_sparc_tls_ie_ldx:    return ELF::R_SPARC_TLS_IE_LDX;
100  case Sparc::fixup_sparc_tls_ie_add:    return ELF::R_SPARC_TLS_IE_ADD;
101  case Sparc::fixup_sparc_tls_le_hix22:  return ELF::R_SPARC_TLS_LE_HIX22;
102  case Sparc::fixup_sparc_tls_le_lox10:  return ELF::R_SPARC_TLS_LE_LOX10;
103  }
104
105  return ELF::R_SPARC_NONE;
106}
107
108MCObjectWriter *llvm::createSparcELFObjectWriter(raw_pwrite_stream &OS,
109                                                 bool Is64Bit, uint8_t OSABI) {
110  MCELFObjectTargetWriter *MOTW = new SparcELFObjectWriter(Is64Bit, OSABI);
111  return createELFObjectWriter(MOTW, OS,  /*IsLittleEndian=*/false);
112}
113