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
|
//===- yaml2obj - Convert YAML to a binary object file --------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This program takes a YAML description of an object file and outputs the
// binary equivalent.
//
// This is used for writing tests that require binary files.
//
//===----------------------------------------------------------------------===//
#include "llvm/ObjectYAML/yaml2obj.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ObjectYAML/ObjectYAML.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.h"
#include <optional>
#include <system_error>
using namespace llvm;
namespace {
cl::OptionCategory Cat("yaml2obj Options");
cl::opt<std::string> Input(cl::Positional, cl::desc("<input file>"),
cl::init("-"), cl::cat(Cat));
cl::list<std::string>
D("D", cl::Prefix,
cl::desc("Defined the specified macros to their specified "
"definition. The syntax is <macro>=<definition>"),
cl::cat(Cat));
cl::opt<bool> PreprocessOnly("E", cl::desc("Just print the preprocessed file"),
cl::cat(Cat));
cl::opt<unsigned>
DocNum("docnum", cl::init(1),
cl::desc("Read specified document from input (default = 1)"),
cl::cat(Cat));
static cl::opt<uint64_t> MaxSize(
"max-size", cl::init(10 * 1024 * 1024),
cl::desc(
"Sets the maximum allowed output size (0 means no limit) [ELF only]"),
cl::cat(Cat));
cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"),
cl::value_desc("filename"), cl::init("-"),
cl::Prefix, cl::cat(Cat));
} // namespace
static std::optional<std::string> preprocess(StringRef Buf,
yaml::ErrorHandler ErrHandler) {
DenseMap<StringRef, StringRef> Defines;
for (StringRef Define : D) {
StringRef Macro, Definition;
std::tie(Macro, Definition) = Define.split('=');
if (!Define.count('=') || Macro.empty()) {
ErrHandler("invalid syntax for -D: " + Define);
return {};
}
if (!Defines.try_emplace(Macro, Definition).second) {
ErrHandler("'" + Macro + "'" + " redefined");
return {};
}
}
std::string Preprocessed;
while (!Buf.empty()) {
if (Buf.starts_with("[[")) {
size_t I = Buf.find_first_of("[]", 2);
if (Buf.substr(I).starts_with("]]")) {
StringRef MacroExpr = Buf.substr(2, I - 2);
StringRef Macro;
StringRef Default;
std::tie(Macro, Default) = MacroExpr.split('=');
// When the -D option is requested, we use the provided value.
// Otherwise we use a default macro value if present.
auto It = Defines.find(Macro);
std::optional<StringRef> Value;
if (It != Defines.end())
Value = It->second;
else if (!Default.empty() || MacroExpr.ends_with("="))
Value = Default;
if (Value) {
Preprocessed += *Value;
Buf = Buf.substr(I + 2);
continue;
}
}
}
Preprocessed += Buf[0];
Buf = Buf.substr(1);
}
return Preprocessed;
}
int main(int argc, char **argv) {
InitLLVM X(argc, argv);
cl::HideUnrelatedOptions(Cat);
cl::ParseCommandLineOptions(
argc, argv, "Create an object file from a YAML description", nullptr,
nullptr, /*LongOptionsUseDoubleDash=*/true);
auto ErrHandler = [](const Twine &Msg) {
WithColor::error(errs(), "yaml2obj") << Msg << "\n";
};
std::error_code EC;
std::unique_ptr<ToolOutputFile> Out(
new ToolOutputFile(OutputFilename, EC, sys::fs::OF_None));
if (EC) {
ErrHandler("failed to open '" + OutputFilename + "': " + EC.message());
return 1;
}
ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
MemoryBuffer::getFileOrSTDIN(Input);
if (!Buf)
return 1;
std::optional<std::string> Buffer =
preprocess(Buf.get()->getBuffer(), ErrHandler);
if (!Buffer)
return 1;
if (PreprocessOnly) {
Out->os() << Buffer;
} else {
yaml::Input YIn(*Buffer);
if (!convertYAML(YIn, Out->os(), ErrHandler, DocNum,
MaxSize == 0 ? UINT64_MAX : MaxSize))
return 1;
}
Out->keep();
Out->os().flush();
return 0;
}
|
