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
|
//===- DlltoolDriver.cpp - dlltool.exe-compatible driver ------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Defines an interface to a dlltool.exe-compatible driver.
//
//===----------------------------------------------------------------------===//
#include "llvm/ToolDrivers/llvm-dlltool/DlltoolDriver.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/COFFImportFile.h"
#include "llvm/Object/COFFModuleDefinition.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/Path.h"
#include <vector>
using namespace llvm;
using namespace llvm::object;
using namespace llvm::COFF;
namespace {
enum {
OPT_INVALID = 0,
#define OPTION(_1, _2, ID, _4, _5, _6, _7, _8, _9, _10, _11, _12) OPT_##ID,
#include "Options.inc"
#undef OPTION
};
#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
#include "Options.inc"
#undef PREFIX
static const llvm::opt::OptTable::Info InfoTable[] = {
#define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X7, X8, X9, X10, X11, X12) \
{X1, X2, X10, X11, OPT_##ID, llvm::opt::Option::KIND##Class, \
X9, X8, OPT_##GROUP, OPT_##ALIAS, X7, X12},
#include "Options.inc"
#undef OPTION
};
class DllOptTable : public llvm::opt::OptTable {
public:
DllOptTable() : OptTable(InfoTable, false) {}
};
} // namespace
// Opens a file. Path has to be resolved already.
static std::unique_ptr<MemoryBuffer> openFile(const Twine &Path) {
ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> MB = MemoryBuffer::getFile(Path);
if (std::error_code EC = MB.getError()) {
llvm::errs() << "cannot open file " << Path << ": " << EC.message() << "\n";
return nullptr;
}
return std::move(*MB);
}
static MachineTypes getEmulation(StringRef S) {
return StringSwitch<MachineTypes>(S)
.Case("i386", IMAGE_FILE_MACHINE_I386)
.Case("i386:x86-64", IMAGE_FILE_MACHINE_AMD64)
.Case("arm", IMAGE_FILE_MACHINE_ARMNT)
.Case("arm64", IMAGE_FILE_MACHINE_ARM64)
.Default(IMAGE_FILE_MACHINE_UNKNOWN);
}
int llvm::dlltoolDriverMain(llvm::ArrayRef<const char *> ArgsArr) {
DllOptTable Table;
unsigned MissingIndex;
unsigned MissingCount;
llvm::opt::InputArgList Args =
Table.ParseArgs(ArgsArr.slice(1), MissingIndex, MissingCount);
if (MissingCount) {
llvm::errs() << Args.getArgString(MissingIndex) << ": missing argument\n";
return 1;
}
// Handle when no input or output is specified
if (Args.hasArgNoClaim(OPT_INPUT) ||
(!Args.hasArgNoClaim(OPT_d) && !Args.hasArgNoClaim(OPT_l))) {
Table.PrintHelp(outs(), "llvm-dlltool [options] file...", "llvm-dlltool",
false);
llvm::outs() << "\nTARGETS: i386, i386:x86-64, arm, arm64\n";
return 1;
}
if (!Args.hasArgNoClaim(OPT_m) && Args.hasArgNoClaim(OPT_d)) {
llvm::errs() << "error: no target machine specified\n"
<< "supported targets: i386, i386:x86-64, arm, arm64\n";
return 1;
}
for (auto *Arg : Args.filtered(OPT_UNKNOWN))
llvm::errs() << "ignoring unknown argument: " << Arg->getAsString(Args)
<< "\n";
if (!Args.hasArg(OPT_d)) {
llvm::errs() << "no definition file specified\n";
return 1;
}
std::unique_ptr<MemoryBuffer> MB =
openFile(Args.getLastArg(OPT_d)->getValue());
if (!MB)
return 1;
if (!MB->getBufferSize()) {
llvm::errs() << "definition file empty\n";
return 1;
}
COFF::MachineTypes Machine = IMAGE_FILE_MACHINE_UNKNOWN;
if (auto *Arg = Args.getLastArg(OPT_m))
Machine = getEmulation(Arg->getValue());
if (Machine == IMAGE_FILE_MACHINE_UNKNOWN) {
llvm::errs() << "unknown target\n";
return 1;
}
Expected<COFFModuleDefinition> Def =
parseCOFFModuleDefinition(*MB, Machine, true);
if (!Def) {
llvm::errs() << "error parsing definition\n"
<< errorToErrorCode(Def.takeError()).message();
return 1;
}
// Do this after the parser because parseCOFFModuleDefinition sets OutputFile.
if (auto *Arg = Args.getLastArg(OPT_D))
Def->OutputFile = Arg->getValue();
if (Def->OutputFile.empty()) {
llvm::errs() << "no DLL name specified\n";
return 1;
}
std::string Path = std::string(Args.getLastArgValue(OPT_l));
// If ExtName is set (if the "ExtName = Name" syntax was used), overwrite
// Name with ExtName and clear ExtName. When only creating an import
// library and not linking, the internal name is irrelevant. This avoids
// cases where writeImportLibrary tries to transplant decoration from
// symbol decoration onto ExtName.
for (COFFShortExport& E : Def->Exports) {
if (!E.ExtName.empty()) {
E.Name = E.ExtName;
E.ExtName.clear();
}
}
if (Machine == IMAGE_FILE_MACHINE_I386 && Args.getLastArg(OPT_k)) {
for (COFFShortExport& E : Def->Exports) {
if (!E.AliasTarget.empty() || (!E.Name.empty() && E.Name[0] == '?'))
continue;
E.SymbolName = E.Name;
// Trim off the trailing decoration. Symbols will always have a
// starting prefix here (either _ for cdecl/stdcall, @ for fastcall
// or ? for C++ functions). Vectorcall functions won't have any
// fixed prefix, but the function base name will still be at least
// one char.
E.Name = E.Name.substr(0, E.Name.find('@', 1));
// By making sure E.SymbolName != E.Name for decorated symbols,
// writeImportLibrary writes these symbols with the type
// IMPORT_NAME_UNDECORATE.
}
}
if (!Path.empty() &&
writeImportLibrary(Def->OutputFile, Path, Def->Exports, Machine, true))
return 1;
return 0;
}
|
