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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
//===- COFFObject.h ---------------------------------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_OBJCOPY_COFF_COFFOBJECT_H
#define LLVM_LIB_OBJCOPY_COFF_COFFOBJECT_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/BinaryFormat/COFF.h"
#include "llvm/Object/COFF.h"
#include <cstddef>
#include <cstdint>
#include <vector>
namespace llvm {
namespace objcopy {
namespace coff {
struct Relocation {
Relocation() = default;
Relocation(const object::coff_relocation &R) : Reloc(R) {}
object::coff_relocation Reloc;
size_t Target = 0;
StringRef TargetName; // Used for diagnostics only
};
struct Section {
object::coff_section Header;
std::vector<Relocation> Relocs;
StringRef Name;
ssize_t UniqueId;
size_t Index;
ArrayRef<uint8_t> getContents() const {
if (!OwnedContents.empty())
return OwnedContents;
return ContentsRef;
}
void setContentsRef(ArrayRef<uint8_t> Data) {
OwnedContents.clear();
ContentsRef = Data;
}
void setOwnedContents(std::vector<uint8_t> &&Data) {
ContentsRef = ArrayRef<uint8_t>();
OwnedContents = std::move(Data);
Header.SizeOfRawData = OwnedContents.size();
}
void clearContents() {
ContentsRef = ArrayRef<uint8_t>();
OwnedContents.clear();
}
private:
ArrayRef<uint8_t> ContentsRef;
std::vector<uint8_t> OwnedContents;
};
struct AuxSymbol {
AuxSymbol(ArrayRef<uint8_t> In) {
assert(In.size() == sizeof(Opaque));
std::copy(In.begin(), In.end(), Opaque);
}
ArrayRef<uint8_t> getRef() const {
return ArrayRef<uint8_t>(Opaque, sizeof(Opaque));
}
uint8_t Opaque[sizeof(object::coff_symbol16)];
};
struct Symbol {
object::coff_symbol32 Sym;
StringRef Name;
std::vector<AuxSymbol> AuxData;
StringRef AuxFile;
ssize_t TargetSectionId;
ssize_t AssociativeComdatTargetSectionId = 0;
std::optional<size_t> WeakTargetSymbolId;
size_t UniqueId;
size_t RawIndex;
bool Referenced;
};
struct Object {
bool IsPE = false;
object::dos_header DosHeader;
ArrayRef<uint8_t> DosStub;
object::coff_file_header CoffFileHeader;
bool Is64 = false;
object::pe32plus_header PeHeader;
uint32_t BaseOfData = 0; // pe32plus_header lacks this field.
std::vector<object::data_directory> DataDirectories;
ArrayRef<Symbol> getSymbols() const { return Symbols; }
// This allows mutating individual Symbols, but not mutating the list
// of symbols itself.
iterator_range<std::vector<Symbol>::iterator> getMutableSymbols() {
return make_range(Symbols.begin(), Symbols.end());
}
const Symbol *findSymbol(size_t UniqueId) const;
void addSymbols(ArrayRef<Symbol> NewSymbols);
Error removeSymbols(function_ref<Expected<bool>(const Symbol &)> ToRemove);
// Set the Referenced field on all Symbols, based on relocations in
// all sections.
Error markSymbols();
ArrayRef<Section> getSections() const { return Sections; }
// This allows mutating individual Sections, but not mutating the list
// of sections itself.
iterator_range<std::vector<Section>::iterator> getMutableSections() {
return make_range(Sections.begin(), Sections.end());
}
const Section *findSection(ssize_t UniqueId) const;
void addSections(ArrayRef<Section> NewSections);
void removeSections(function_ref<bool(const Section &)> ToRemove);
void truncateSections(function_ref<bool(const Section &)> ToTruncate);
private:
std::vector<Symbol> Symbols;
DenseMap<size_t, Symbol *> SymbolMap;
size_t NextSymbolUniqueId = 0;
std::vector<Section> Sections;
DenseMap<ssize_t, Section *> SectionMap;
ssize_t NextSectionUniqueId = 1; // Allow a UniqueId 0 to mean undefined.
// Update SymbolMap.
void updateSymbols();
// Update SectionMap and Index in each Section.
void updateSections();
};
// Copy between coff_symbol16 and coff_symbol32.
// The source and destination files can use either coff_symbol16 or
// coff_symbol32, while we always store them as coff_symbol32 in the
// intermediate data structure.
template <class Symbol1Ty, class Symbol2Ty>
void copySymbol(Symbol1Ty &Dest, const Symbol2Ty &Src) {
static_assert(sizeof(Dest.Name.ShortName) == sizeof(Src.Name.ShortName),
"Mismatched name sizes");
memcpy(Dest.Name.ShortName, Src.Name.ShortName, sizeof(Dest.Name.ShortName));
Dest.Value = Src.Value;
Dest.SectionNumber = Src.SectionNumber;
Dest.Type = Src.Type;
Dest.StorageClass = Src.StorageClass;
Dest.NumberOfAuxSymbols = Src.NumberOfAuxSymbols;
}
// Copy between pe32_header and pe32plus_header.
// We store the intermediate state in a pe32plus_header.
template <class PeHeader1Ty, class PeHeader2Ty>
void copyPeHeader(PeHeader1Ty &Dest, const PeHeader2Ty &Src) {
Dest.Magic = Src.Magic;
Dest.MajorLinkerVersion = Src.MajorLinkerVersion;
Dest.MinorLinkerVersion = Src.MinorLinkerVersion;
Dest.SizeOfCode = Src.SizeOfCode;
Dest.SizeOfInitializedData = Src.SizeOfInitializedData;
Dest.SizeOfUninitializedData = Src.SizeOfUninitializedData;
Dest.AddressOfEntryPoint = Src.AddressOfEntryPoint;
Dest.BaseOfCode = Src.BaseOfCode;
Dest.ImageBase = Src.ImageBase;
Dest.SectionAlignment = Src.SectionAlignment;
Dest.FileAlignment = Src.FileAlignment;
Dest.MajorOperatingSystemVersion = Src.MajorOperatingSystemVersion;
Dest.MinorOperatingSystemVersion = Src.MinorOperatingSystemVersion;
Dest.MajorImageVersion = Src.MajorImageVersion;
Dest.MinorImageVersion = Src.MinorImageVersion;
Dest.MajorSubsystemVersion = Src.MajorSubsystemVersion;
Dest.MinorSubsystemVersion = Src.MinorSubsystemVersion;
Dest.Win32VersionValue = Src.Win32VersionValue;
Dest.SizeOfImage = Src.SizeOfImage;
Dest.SizeOfHeaders = Src.SizeOfHeaders;
Dest.CheckSum = Src.CheckSum;
Dest.Subsystem = Src.Subsystem;
Dest.DLLCharacteristics = Src.DLLCharacteristics;
Dest.SizeOfStackReserve = Src.SizeOfStackReserve;
Dest.SizeOfStackCommit = Src.SizeOfStackCommit;
Dest.SizeOfHeapReserve = Src.SizeOfHeapReserve;
Dest.SizeOfHeapCommit = Src.SizeOfHeapCommit;
Dest.LoaderFlags = Src.LoaderFlags;
Dest.NumberOfRvaAndSize = Src.NumberOfRvaAndSize;
}
} // end namespace coff
} // end namespace objcopy
} // end namespace llvm
#endif // LLVM_LIB_OBJCOPY_COFF_COFFOBJECT_H
|
