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
|
//===- lib/ReaderWriter/ELF/Mips/MipsTargetHandler.h ----------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_READER_WRITER_ELF_MIPS_MIPS_TARGET_HANDLER_H
#define LLD_READER_WRITER_ELF_MIPS_MIPS_TARGET_HANDLER_H
#include "DefaultTargetHandler.h"
#include "MipsLinkingContext.h"
#include "MipsRelocationHandler.h"
#include "MipsSectionChunks.h"
#include "TargetLayout.h"
namespace lld {
namespace elf {
/// \brief TargetLayout for Mips
template <class ELFType>
class MipsTargetLayout final : public TargetLayout<ELFType> {
public:
MipsTargetLayout(const MipsLinkingContext &ctx)
: TargetLayout<ELFType>(ctx),
_gotSection(new (_alloc) MipsGOTSection<ELFType>(ctx)),
_cachedGP(false) {}
const MipsGOTSection<ELFType> &getGOTSection() const { return *_gotSection; }
AtomSection<ELFType> *
createSection(StringRef name, int32_t type,
DefinedAtom::ContentPermissions permissions,
Layout::SectionOrder order) override {
if (type == DefinedAtom::typeGOT && name == ".got")
return _gotSection;
return DefaultLayout<ELFType>::createSection(name, type, permissions,
order);
}
/// \brief GP offset relative to .got section.
uint64_t getGPOffset() const { return 0x7FF0; }
/// \brief Get the cached value of the GP atom.
AtomLayout *getGP() {
if (!_cachedGP) {
auto gpAtomIter = this->findAbsoluteAtom("_gp_disp");
_gp = *(gpAtomIter);
_cachedGP = true;
}
return _gp;
}
private:
llvm::BumpPtrAllocator _alloc;
MipsGOTSection<ELFType> *_gotSection;
AtomLayout *_gp;
bool _cachedGP;
};
/// \brief Mips Runtime file.
template <class ELFType> class MipsRuntimeFile : public CRuntimeFile<ELFType> {
public:
MipsRuntimeFile(const MipsLinkingContext &context)
: CRuntimeFile<ELFType>(context, "Mips runtime file") {}
};
/// \brief TargetHandler for Mips
class MipsTargetHandler final
: public DefaultTargetHandler<Mips32ElELFType> {
public:
MipsTargetHandler(MipsLinkingContext &context);
MipsTargetLayout<Mips32ElELFType> &getTargetLayout() override {
return *(_mipsTargetLayout.get());
}
const MipsTargetRelocationHandler &getRelocationHandler() const override {
return *(_mipsRelocationHandler.get());
}
std::unique_ptr<Writer> getWriter() override;
void registerRelocationNames(Registry ®istry) override ;
private:
static const Registry::KindStrings kindStrings[];
MipsLinkingContext &_mipsLinkingContext;
std::unique_ptr<MipsRuntimeFile<Mips32ElELFType>> _mipsRuntimeFile;
std::unique_ptr<MipsTargetLayout<Mips32ElELFType>> _mipsTargetLayout;
std::unique_ptr<MipsTargetRelocationHandler> _mipsRelocationHandler;
};
class MipsDynamicSymbolTable : public DynamicSymbolTable<Mips32ElELFType> {
public:
MipsDynamicSymbolTable(const MipsLinkingContext &context,
MipsTargetLayout<Mips32ElELFType> &layout)
: DynamicSymbolTable<Mips32ElELFType>(
context, layout, ".dynsym",
DefaultLayout<Mips32ElELFType>::ORDER_DYNAMIC_SYMBOLS),
_mipsTargetLayout(layout) {}
void sortSymbols() override {
std::stable_sort(_symbolTable.begin(), _symbolTable.end(),
[this](const SymbolEntry &A, const SymbolEntry &B) {
if (A._symbol.getBinding() != STB_GLOBAL &&
B._symbol.getBinding() != STB_GLOBAL)
return A._symbol.getBinding() < B._symbol.getBinding();
return _mipsTargetLayout.getGOTSection().compare(A._atom, B._atom);
});
}
private:
MipsTargetLayout<Mips32ElELFType> &_mipsTargetLayout;
};
} // end namespace elf
} // end namespace lld
#endif
|
