1 //===- DlltoolDriver.cpp - dlltool.exe-compatible driver ------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Defines an interface to a dlltool.exe-compatible driver.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/ToolDrivers/llvm-dlltool/DlltoolDriver.h"
15 #include "llvm/Object/COFF.h"
16 #include "llvm/Object/COFFImportFile.h"
17 #include "llvm/Object/COFFModuleDefinition.h"
18 #include "llvm/Option/Arg.h"
19 #include "llvm/Option/ArgList.h"
20 #include "llvm/Option/Option.h"
21 #include "llvm/Support/Path.h"
26 using namespace llvm::object;
27 using namespace llvm::COFF;
33 #define OPTION(_1, _2, ID, _4, _5, _6, _7, _8, _9, _10, _11, _12) OPT_##ID,
34 #include "Options.inc"
38 #define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
39 #include "Options.inc"
42 static const llvm::opt::OptTable::Info InfoTable[] = {
43 #define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X7, X8, X9, X10, X11, X12) \
44 {X1, X2, X10, X11, OPT_##ID, llvm::opt::Option::KIND##Class, \
45 X9, X8, OPT_##GROUP, OPT_##ALIAS, X7, X12},
46 #include "Options.inc"
50 class DllOptTable : public llvm::opt::OptTable {
52 DllOptTable() : OptTable(InfoTable, false) {}
57 // Opens a file. Path has to be resolved already.
58 static std::unique_ptr<MemoryBuffer> openFile(const Twine &Path) {
59 ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> MB = MemoryBuffer::getFile(Path);
61 if (std::error_code EC = MB.getError()) {
62 llvm::errs() << "cannot open file " << Path << ": " << EC.message() << "\n";
66 return std::move(*MB);
69 static MachineTypes getEmulation(StringRef S) {
70 return StringSwitch<MachineTypes>(S)
71 .Case("i386", IMAGE_FILE_MACHINE_I386)
72 .Case("i386:x86-64", IMAGE_FILE_MACHINE_AMD64)
73 .Case("arm", IMAGE_FILE_MACHINE_ARMNT)
74 .Case("arm64", IMAGE_FILE_MACHINE_ARM64)
75 .Default(IMAGE_FILE_MACHINE_UNKNOWN);
78 static std::string getImplibPath(StringRef Path) {
79 SmallString<128> Out = StringRef("lib");
81 sys::path::replace_extension(Out, ".a");
85 int llvm::dlltoolDriverMain(llvm::ArrayRef<const char *> ArgsArr) {
87 unsigned MissingIndex;
88 unsigned MissingCount;
89 llvm::opt::InputArgList Args =
90 Table.ParseArgs(ArgsArr.slice(1), MissingIndex, MissingCount);
92 llvm::errs() << Args.getArgString(MissingIndex) << ": missing argument\n";
96 // Handle when no input or output is specified
97 if (Args.hasArgNoClaim(OPT_INPUT) ||
98 (!Args.hasArgNoClaim(OPT_d) && !Args.hasArgNoClaim(OPT_l))) {
99 Table.PrintHelp(outs(), "llvm-dlltool [options] file...", "llvm-dlltool",
101 llvm::outs() << "\nTARGETS: i386, i386:x86-64, arm, arm64\n";
105 if (!Args.hasArgNoClaim(OPT_m) && Args.hasArgNoClaim(OPT_d)) {
106 llvm::errs() << "error: no target machine specified\n"
107 << "supported targets: i386, i386:x86-64, arm, arm64\n";
111 for (auto *Arg : Args.filtered(OPT_UNKNOWN))
112 llvm::errs() << "ignoring unknown argument: " << Arg->getSpelling() << "\n";
114 if (!Args.hasArg(OPT_d)) {
115 llvm::errs() << "no definition file specified\n";
119 std::unique_ptr<MemoryBuffer> MB =
120 openFile(Args.getLastArg(OPT_d)->getValue());
124 if (!MB->getBufferSize()) {
125 llvm::errs() << "definition file empty\n";
129 COFF::MachineTypes Machine = IMAGE_FILE_MACHINE_UNKNOWN;
130 if (auto *Arg = Args.getLastArg(OPT_m))
131 Machine = getEmulation(Arg->getValue());
133 if (Machine == IMAGE_FILE_MACHINE_UNKNOWN) {
134 llvm::errs() << "unknown target\n";
138 Expected<COFFModuleDefinition> Def =
139 parseCOFFModuleDefinition(*MB, Machine, true);
142 llvm::errs() << "error parsing definition\n"
143 << errorToErrorCode(Def.takeError()).message();
147 // Do this after the parser because parseCOFFModuleDefinition sets OutputFile.
148 if (auto *Arg = Args.getLastArg(OPT_D))
149 Def->OutputFile = Arg->getValue();
151 if (Def->OutputFile.empty()) {
152 llvm::errs() << "no output file specified\n";
156 std::string Path = Args.getLastArgValue(OPT_l);
158 Path = getImplibPath(Def->OutputFile);
160 if (Machine == IMAGE_FILE_MACHINE_I386 && Args.getLastArg(OPT_k)) {
161 for (COFFShortExport& E : Def->Exports) {
162 if (!E.AliasTarget.empty() || (!E.Name.empty() && E.Name[0] == '?'))
164 E.SymbolName = E.Name;
165 // Trim off the trailing decoration. Symbols will always have a
166 // starting prefix here (either _ for cdecl/stdcall, @ for fastcall
167 // or ? for C++ functions). Vectorcall functions won't have any
168 // fixed prefix, but the function base name will still be at least
170 E.Name = E.Name.substr(0, E.Name.find('@', 1));
171 // By making sure E.SymbolName != E.Name for decorated symbols,
172 // writeImportLibrary writes these symbols with the type
173 // IMPORT_NAME_UNDECORATE.
177 if (writeImportLibrary(Def->OutputFile, Path, Def->Exports, Machine, true))