1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
//===-- SparcELFObjectWriter.cpp - Sparc ELF Writer -----------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/SparcFixupKinds.h"
#include "MCTargetDesc/SparcMCAsmInfo.h"
#include "MCTargetDesc/SparcMCTargetDesc.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
namespace {
class SparcELFObjectWriter : public MCELFObjectTargetWriter {
public:
SparcELFObjectWriter(bool Is64Bit, bool IsV8Plus, uint8_t OSABI)
: MCELFObjectTargetWriter(
Is64Bit, OSABI,
Is64Bit ? ELF::EM_SPARCV9
: (IsV8Plus ? ELF::EM_SPARC32PLUS : ELF::EM_SPARC),
/*HasRelocationAddend*/ true) {}
~SparcELFObjectWriter() override = default;
protected:
unsigned getRelocType(const MCFixup &Fixup, const MCValue &Target,
bool IsPCRel) const override;
bool needsRelocateWithSymbol(const MCValue &, unsigned Type) const override;
};
}
unsigned SparcELFObjectWriter::getRelocType(const MCFixup &Fixup,
const MCValue &Target,
bool IsPCRel) const {
switch (Target.getSpecifier()) {
case ELF::R_SPARC_TLS_GD_HI22:
case ELF::R_SPARC_TLS_GD_LO10:
case ELF::R_SPARC_TLS_GD_ADD:
case ELF::R_SPARC_TLS_LDM_HI22:
case ELF::R_SPARC_TLS_LDM_LO10:
case ELF::R_SPARC_TLS_LDM_ADD:
case ELF::R_SPARC_TLS_LDO_HIX22:
case ELF::R_SPARC_TLS_LDO_LOX10:
case ELF::R_SPARC_TLS_LDO_ADD:
case ELF::R_SPARC_TLS_IE_HI22:
case ELF::R_SPARC_TLS_IE_LO10:
case ELF::R_SPARC_TLS_IE_LD:
case ELF::R_SPARC_TLS_IE_LDX:
case ELF::R_SPARC_TLS_IE_ADD:
case ELF::R_SPARC_TLS_LE_HIX22:
case ELF::R_SPARC_TLS_LE_LOX10:
if (auto *SA = Target.getAddSym())
cast<MCSymbolELF>(SA)->setType(ELF::STT_TLS);
break;
default:
break;
}
// Extract the relocation type from the fixup kind, after applying STT_TLS as
// needed.
auto Kind = Fixup.getKind();
if (mc::isRelocation(Fixup.getKind()))
return Kind;
if (const auto *SExpr = dyn_cast<MCSpecifierExpr>(Fixup.getValue())) {
if (SExpr->getSpecifier() == ELF::R_SPARC_DISP32)
return ELF::R_SPARC_DISP32;
}
if (IsPCRel) {
switch (Kind) {
default:
llvm_unreachable("Unimplemented fixup -> relocation");
case FK_Data_1: return ELF::R_SPARC_DISP8;
case FK_Data_2: return ELF::R_SPARC_DISP16;
case FK_Data_4: return ELF::R_SPARC_DISP32;
case FK_Data_8: return ELF::R_SPARC_DISP64;
case Sparc::fixup_sparc_call30:
if (getContext().getObjectFileInfo()->isPositionIndependent())
return ELF::R_SPARC_WPLT30;
return ELF::R_SPARC_WDISP30;
}
}
// clang-format off
switch(Fixup.getKind()) {
default:
llvm_unreachable("Unimplemented fixup -> relocation");
case FK_NONE: return ELF::R_SPARC_NONE;
case FK_Data_1: return ELF::R_SPARC_8;
case FK_Data_2: return ((Fixup.getOffset() % 2)
? ELF::R_SPARC_UA16
: ELF::R_SPARC_16);
case FK_Data_4: return ((Fixup.getOffset() % 4)
? ELF::R_SPARC_UA32
: ELF::R_SPARC_32);
case FK_Data_8: return ((Fixup.getOffset() % 8)
? ELF::R_SPARC_UA64
: ELF::R_SPARC_64);
case Sparc::fixup_sparc_13:
if (getContext().getObjectFileInfo()->isPositionIndependent())
return ELF::R_SPARC_GOT13;
return ELF::R_SPARC_13;
}
// clang-format on
return ELF::R_SPARC_NONE;
}
bool SparcELFObjectWriter::needsRelocateWithSymbol(const MCValue &,
unsigned Type) const {
switch (Type) {
default:
return false;
// All relocations that use a GOT need a symbol, not an offset, as
// the offset of the symbol within the section is irrelevant to
// where the GOT entry is. Don't need to list all the TLS entries,
// as they're all marked as requiring a symbol anyways.
case ELF::R_SPARC_GOT10:
case ELF::R_SPARC_GOT13:
case ELF::R_SPARC_GOT22:
case ELF::R_SPARC_GOTDATA_HIX22:
case ELF::R_SPARC_GOTDATA_LOX10:
case ELF::R_SPARC_GOTDATA_OP_HIX22:
case ELF::R_SPARC_GOTDATA_OP_LOX10:
return true;
}
}
std::unique_ptr<MCObjectTargetWriter>
llvm::createSparcELFObjectWriter(bool Is64Bit, bool IsV8Plus, uint8_t OSABI) {
return std::make_unique<SparcELFObjectWriter>(Is64Bit, IsV8Plus, OSABI);
}
|
