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
| //===- TBEHandler.cpp -----------------------------------------------------===//
//
// 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 "llvm/TextAPI/ELF/TBEHandler.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/TextAPI/ELF/ELFStub.h"
using namespace llvm;
using namespace llvm::elfabi;
LLVM_YAML_STRONG_TYPEDEF(ELFArch, ELFArchMapper)
namespace llvm {
namespace yaml {
/// YAML traits for ELFSymbolType.
template <> struct ScalarEnumerationTraits<ELFSymbolType> {
static void enumeration(IO &IO, ELFSymbolType &SymbolType) {
IO.enumCase(SymbolType, "NoType", ELFSymbolType::NoType);
IO.enumCase(SymbolType, "Func", ELFSymbolType::Func);
IO.enumCase(SymbolType, "Object", ELFSymbolType::Object);
IO.enumCase(SymbolType, "TLS", ELFSymbolType::TLS);
IO.enumCase(SymbolType, "Unknown", ELFSymbolType::Unknown);
// Treat other symbol types as noise, and map to Unknown.
if (!IO.outputting() && IO.matchEnumFallback())
SymbolType = ELFSymbolType::Unknown;
}
};
/// YAML traits for ELFArch.
template <> struct ScalarTraits<ELFArchMapper> {
static void output(const ELFArchMapper &Value, void *,
llvm::raw_ostream &Out) {
// Map from integer to architecture string.
switch (Value) {
case (ELFArch)ELF::EM_X86_64:
Out << "x86_64";
break;
case (ELFArch)ELF::EM_AARCH64:
Out << "AArch64";
break;
case (ELFArch)ELF::EM_NONE:
default:
Out << "Unknown";
}
}
static StringRef input(StringRef Scalar, void *, ELFArchMapper &Value) {
// Map from architecture string to integer.
Value = StringSwitch<ELFArch>(Scalar)
.Case("x86_64", ELF::EM_X86_64)
.Case("AArch64", ELF::EM_AARCH64)
.Case("Unknown", ELF::EM_NONE)
.Default(ELF::EM_NONE);
// Returning empty StringRef indicates successful parse.
return StringRef();
}
// Don't place quotation marks around architecture value.
static QuotingType mustQuote(StringRef) { return QuotingType::None; }
};
/// YAML traits for TbeVersion.
template <> struct ScalarTraits<VersionTuple> {
static void output(const VersionTuple &Value, void *,
llvm::raw_ostream &Out) {
Out << Value.getAsString();
}
static StringRef input(StringRef Scalar, void *, VersionTuple &Value) {
if (Value.tryParse(Scalar))
return StringRef("Can't parse version: invalid version format.");
if (Value > TBEVersionCurrent)
return StringRef("Unsupported TBE version.");
// Returning empty StringRef indicates successful parse.
return StringRef();
}
// Don't place quotation marks around version value.
static QuotingType mustQuote(StringRef) { return QuotingType::None; }
};
/// YAML traits for ELFSymbol.
template <> struct MappingTraits<ELFSymbol> {
static void mapping(IO &IO, ELFSymbol &Symbol) {
IO.mapRequired("Type", Symbol.Type);
// The need for symbol size depends on the symbol type.
if (Symbol.Type == ELFSymbolType::NoType) {
IO.mapOptional("Size", Symbol.Size, (uint64_t)0);
} else if (Symbol.Type == ELFSymbolType::Func) {
Symbol.Size = 0;
} else {
IO.mapRequired("Size", Symbol.Size);
}
IO.mapOptional("Undefined", Symbol.Undefined, false);
IO.mapOptional("Weak", Symbol.Weak, false);
IO.mapOptional("Warning", Symbol.Warning);
}
// Compacts symbol information into a single line.
static const bool flow = true;
};
/// YAML traits for set of ELFSymbols.
template <> struct CustomMappingTraits<std::set<ELFSymbol>> {
static void inputOne(IO &IO, StringRef Key, std::set<ELFSymbol> &Set) {
ELFSymbol Sym(Key.str());
IO.mapRequired(Key.str().c_str(), Sym);
Set.insert(Sym);
}
static void output(IO &IO, std::set<ELFSymbol> &Set) {
for (auto &Sym : Set)
IO.mapRequired(Sym.Name.c_str(), const_cast<ELFSymbol &>(Sym));
}
};
/// YAML traits for ELFStub objects.
template <> struct MappingTraits<ELFStub> {
static void mapping(IO &IO, ELFStub &Stub) {
if (!IO.mapTag("!tapi-tbe", true))
IO.setError("Not a .tbe YAML file.");
IO.mapRequired("TbeVersion", Stub.TbeVersion);
IO.mapOptional("SoName", Stub.SoName);
IO.mapRequired("Arch", (ELFArchMapper &)Stub.Arch);
IO.mapOptional("NeededLibs", Stub.NeededLibs);
IO.mapRequired("Symbols", Stub.Symbols);
}
};
} // end namespace yaml
} // end namespace llvm
Expected<std::unique_ptr<ELFStub>> elfabi::readTBEFromBuffer(StringRef Buf) {
yaml::Input YamlIn(Buf);
std::unique_ptr<ELFStub> Stub(new ELFStub());
YamlIn >> *Stub;
if (std::error_code Err = YamlIn.error())
return createStringError(Err, "YAML failed reading as TBE");
return std::move(Stub);
}
Error elfabi::writeTBEToOutputStream(raw_ostream &OS, const ELFStub &Stub) {
yaml::Output YamlOut(OS, NULL, /*WrapColumn =*/0);
YamlOut << const_cast<ELFStub &>(Stub);
return Error::success();
}
|