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llvm-project/llvm/tools/llvm-ml/llvm-ml.cpp

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//===-- llvm-ml.cpp - masm-compatible assembler -----------------*- 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
//
//===----------------------------------------------------------------------===//
//
// A simple driver around MasmParser; based on llvm-mc.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringSwitch.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCParser/AsmLexer.h"
#include "llvm/MC/MCParser/MCTargetAsmParser.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCTargetOptionsCommandFlags.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/WithColor.h"
using namespace llvm;
using namespace llvm::opt;
namespace {
enum ID {
OPT_INVALID = 0, // This is not an option ID.
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR, VALUES) \
OPT_##ID,
#include "Opts.inc"
#undef OPTION
};
#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
#include "Opts.inc"
#undef PREFIX
static const opt::OptTable::Info InfoTable[] = {
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR, VALUES) \
{ \
PREFIX, NAME, HELPTEXT, \
METAVAR, OPT_##ID, opt::Option::KIND##Class, \
PARAM, FLAGS, OPT_##GROUP, \
OPT_##ALIAS, ALIASARGS, VALUES},
#include "Opts.inc"
#undef OPTION
};
class MLOptTable : public opt::OptTable {
public:
MLOptTable() : OptTable(InfoTable, /*IgnoreCase=*/false) {}
};
} // namespace
static Triple GetTriple(StringRef ProgName, opt::InputArgList &Args) {
// Figure out the target triple.
StringRef DefaultBitness = "32";
SmallString<255> Program = ProgName;
sys::path::replace_extension(Program, "");
if (Program.endswith("ml64"))
DefaultBitness = "64";
StringRef TripleName =
StringSwitch<StringRef>(Args.getLastArgValue(OPT_bitness, DefaultBitness))
.Case("32", "i386-pc-windows")
.Case("64", "x86_64-pc-windows")
.Default("");
return Triple(Triple::normalize(TripleName));
}
static std::unique_ptr<ToolOutputFile> GetOutputStream(StringRef Path) {
std::error_code EC;
auto Out = std::make_unique<ToolOutputFile>(Path, EC, sys::fs::F_None);
if (EC) {
WithColor::error() << EC.message() << '\n';
return nullptr;
}
return Out;
}
static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI, raw_ostream &OS) {
AsmLexer Lexer(MAI);
Lexer.setBuffer(SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer());
Lexer.setLexMasmIntegers(true);
Lexer.useMasmDefaultRadix(true);
Lexer.setLexMasmHexFloats(true);
Lexer.setLexMasmStrings(true);
bool Error = false;
while (Lexer.Lex().isNot(AsmToken::Eof)) {
Lexer.getTok().dump(OS);
OS << "\n";
if (Lexer.getTok().getKind() == AsmToken::Error)
Error = true;
}
return Error;
}
static int AssembleInput(StringRef ProgName, const Target *TheTarget,
SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str,
MCAsmInfo &MAI, MCSubtargetInfo &STI,
MCInstrInfo &MCII, MCTargetOptions &MCOptions,
const opt::ArgList &InputArgs) {
std::unique_ptr<MCAsmParser> Parser(
createMCMasmParser(SrcMgr, Ctx, Str, MAI, 0));
std::unique_ptr<MCTargetAsmParser> TAP(
TheTarget->createMCAsmParser(STI, *Parser, MCII, MCOptions));
if (!TAP) {
WithColor::error(errs(), ProgName)
<< "this target does not support assembly parsing.\n";
return 1;
}
Parser->setShowParsedOperands(InputArgs.hasArg(OPT_show_inst_operands));
Parser->setTargetParser(*TAP);
Parser->getLexer().setLexMasmIntegers(true);
Parser->getLexer().useMasmDefaultRadix(true);
Parser->getLexer().setLexMasmHexFloats(true);
Parser->getLexer().setLexMasmStrings(true);
auto Defines = InputArgs.getAllArgValues(OPT_define);
for (StringRef Define : Defines) {
const auto NameValue = Define.split('=');
StringRef Name = NameValue.first, Value = NameValue.second;
if (Parser->defineMacro(Name, Value)) {
WithColor::error(errs(), ProgName)
<< "can't define macro '" << Name << "' = '" << Value << "'\n";
return 1;
}
}
int Res = Parser->Run(/*NoInitialTextSection=*/true);
return Res;
}
int main(int Argc, char **Argv) {
InitLLVM X(Argc, Argv);
StringRef ProgName = sys::path::filename(Argv[0]);
// Initialize targets and assembly printers/parsers.
llvm::InitializeAllTargetInfos();
llvm::InitializeAllTargetMCs();
llvm::InitializeAllAsmParsers();
llvm::InitializeAllDisassemblers();
MLOptTable T;
unsigned MissingArgIndex, MissingArgCount;
ArrayRef<const char *> ArgsArr = makeArrayRef(Argv + 1, Argc - 1);
opt::InputArgList InputArgs =
T.ParseArgs(ArgsArr, MissingArgIndex, MissingArgCount);
std::string InputFilename;
for (auto *Arg : InputArgs.filtered(OPT_INPUT)) {
std::string ArgString = Arg->getAsString(InputArgs);
if (ArgString == "-" || StringRef(ArgString).endswith(".asm")) {
if (!InputFilename.empty()) {
WithColor::warning(errs(), ProgName)
<< "does not support multiple assembly files in one command; "
<< "ignoring '" << InputFilename << "'\n";
}
InputFilename = ArgString;
} else {
std::string Diag;
raw_string_ostream OS(Diag);
OS << "invalid option '" << ArgString << "'";
std::string Nearest;
if (T.findNearest(ArgString, Nearest) < 2)
OS << ", did you mean '" << Nearest << "'?";
WithColor::error(errs(), ProgName) << OS.str() << '\n';
exit(1);
}
}
for (auto *Arg : InputArgs.filtered(OPT_assembly_file)) {
if (!InputFilename.empty()) {
WithColor::warning(errs(), ProgName)
<< "does not support multiple assembly files in one command; "
<< "ignoring '" << InputFilename << "'\n";
}
InputFilename = Arg->getAsString(InputArgs);
}
for (auto *Arg : InputArgs.filtered(OPT_unsupported_Group)) {
WithColor::warning(errs(), ProgName)
<< "ignoring unsupported '" << Arg->getOption().getName()
<< "' option\n";
}
if (InputArgs.hasArg(OPT_help)) {
std::string Usage = llvm::formatv("{0} [ /options ] file", ProgName).str();
T.PrintHelp(outs(), Usage.c_str(), "LLVM MASM Assembler",
/*ShowHidden=*/false);
return 0;
} else if (InputFilename.empty()) {
outs() << "USAGE: " << ProgName << " [ /options ] file\n"
<< "Run \"" << ProgName << " /?\" or \"" << ProgName
<< " /help\" for more info.\n";
return 0;
}
MCTargetOptions MCOptions;
MCOptions.AssemblyLanguage = "masm";
Triple TheTriple = GetTriple(ProgName, InputArgs);
std::string Error;
const Target *TheTarget = TargetRegistry::lookupTarget("", TheTriple, Error);
if (!TheTarget) {
WithColor::error(errs(), ProgName) << Error;
return 1;
}
const std::string &TripleName = TheTriple.getTriple();
bool SafeSEH = InputArgs.hasArg(OPT_safeseh);
if (SafeSEH && !(TheTriple.isArch32Bit() && TheTriple.isX86())) {
WithColor::warning()
<< "/safeseh applies only to 32-bit X86 platforms; ignoring.\n";
SafeSEH = false;
}
ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr =
MemoryBuffer::getFileOrSTDIN(InputFilename);
if (std::error_code EC = BufferPtr.getError()) {
WithColor::error(errs(), ProgName)
<< InputFilename << ": " << EC.message() << '\n';
return 1;
}
SourceMgr SrcMgr;
// Tell SrcMgr about this buffer, which is what the parser will pick up.
SrcMgr.AddNewSourceBuffer(std::move(*BufferPtr), SMLoc());
// Record the location of the include directories so that the lexer can find
// it later.
SrcMgr.setIncludeDirs(InputArgs.getAllArgValues(OPT_include_path));
std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
assert(MRI && "Unable to create target register info!");
std::unique_ptr<MCAsmInfo> MAI(
TheTarget->createMCAsmInfo(*MRI, TripleName, MCOptions));
assert(MAI && "Unable to create target asm info!");
MAI->setPreserveAsmComments(InputArgs.hasArg(OPT_preserve_comments));
// FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and
// MCObjectFileInfo needs a MCContext reference in order to initialize itself.
MCObjectFileInfo MOFI;
MCContext Ctx(MAI.get(), MRI.get(), &MOFI, &SrcMgr);
MOFI.InitMCObjectFileInfo(TheTriple, /*PIC=*/false, Ctx,
/*LargeCodeModel=*/true);
if (InputArgs.hasArg(OPT_save_temp_labels))
Ctx.setAllowTemporaryLabels(false);
// Set compilation information.
SmallString<128> CWD;
if (!sys::fs::current_path(CWD))
Ctx.setCompilationDir(CWD);
Ctx.setMainFileName(InputFilename);
StringRef FileType = InputArgs.getLastArgValue(OPT_filetype, "obj");
SmallString<255> DefaultOutputFilename;
if (InputArgs.hasArg(OPT_as_lex)) {
DefaultOutputFilename = "-";
} else {
DefaultOutputFilename = InputFilename;
sys::path::replace_extension(DefaultOutputFilename, FileType);
}
const StringRef OutputFilename =
InputArgs.getLastArgValue(OPT_output_file, DefaultOutputFilename);
std::unique_ptr<ToolOutputFile> Out = GetOutputStream(OutputFilename);
if (!Out)
return 1;
std::unique_ptr<buffer_ostream> BOS;
raw_pwrite_stream *OS = &Out->os();
std::unique_ptr<MCStreamer> Str;
std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
assert(MCII && "Unable to create instruction info!");
std::unique_ptr<MCSubtargetInfo> STI(TheTarget->createMCSubtargetInfo(
TripleName, /*CPU=*/"", /*Features=*/""));
assert(STI && "Unable to create subtarget info!");
MCInstPrinter *IP = nullptr;
if (FileType == "s") {
const bool OutputATTAsm = InputArgs.hasArg(OPT_output_att_asm);
const unsigned OutputAsmVariant = OutputATTAsm ? 0U // ATT dialect
: 1U; // Intel dialect
IP = TheTarget->createMCInstPrinter(TheTriple, OutputAsmVariant, *MAI,
*MCII, *MRI);
if (!IP) {
WithColor::error()
<< "unable to create instruction printer for target triple '"
<< TheTriple.normalize() << "' with "
<< (OutputATTAsm ? "ATT" : "Intel") << " assembly variant.\n";
return 1;
}
// Set the display preference for hex vs. decimal immediates.
IP->setPrintImmHex(InputArgs.hasArg(OPT_print_imm_hex));
// Set up the AsmStreamer.
std::unique_ptr<MCCodeEmitter> CE;
if (InputArgs.hasArg(OPT_show_encoding))
CE.reset(TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx));
std::unique_ptr<MCAsmBackend> MAB(
TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions));
auto FOut = std::make_unique<formatted_raw_ostream>(*OS);
Str.reset(TheTarget->createAsmStreamer(
Ctx, std::move(FOut), /*asmverbose*/ true,
/*useDwarfDirectory*/ true, IP, std::move(CE), std::move(MAB),
InputArgs.hasArg(OPT_show_inst)));
} else if (FileType == "null") {
Str.reset(TheTarget->createNullStreamer(Ctx));
} else if (FileType == "obj") {
if (!Out->os().supportsSeeking()) {
BOS = std::make_unique<buffer_ostream>(Out->os());
OS = BOS.get();
}
MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx);
MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions);
Str.reset(TheTarget->createMCObjectStreamer(
TheTriple, Ctx, std::unique_ptr<MCAsmBackend>(MAB),
MAB->createObjectWriter(*OS), std::unique_ptr<MCCodeEmitter>(CE), *STI,
MCOptions.MCRelaxAll, MCOptions.MCIncrementalLinkerCompatible,
/*DWARFMustBeAtTheEnd*/ false));
} else {
llvm_unreachable("Invalid file type!");
}
if (TheTriple.isOSBinFormatCOFF()) {
// Emit an absolute @feat.00 symbol. This is a features bitfield read by
// link.exe.
int64_t Feat00Flags = 0x2;
if (SafeSEH) {
// According to the PE-COFF spec, the LSB of this value marks the object
// for "registered SEH". This means that all SEH handler entry points
// must be registered in .sxdata. Use of any unregistered handlers will
// cause the process to terminate immediately.
Feat00Flags |= 0x1;
}
MCSymbol *Feat00Sym = Ctx.getOrCreateSymbol("@feat.00");
Feat00Sym->setRedefinable(true);
Str->emitSymbolAttribute(Feat00Sym, MCSA_Global);
Str->emitAssignment(Feat00Sym, MCConstantExpr::create(Feat00Flags, Ctx));
}
// Use Assembler information for parsing.
Str->setUseAssemblerInfoForParsing(true);
int Res = 1;
if (InputArgs.hasArg(OPT_as_lex)) {
// -as-lex; Lex only, and output a stream of tokens
Res = AsLexInput(SrcMgr, *MAI, Out->os());
} else {
Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, *Str, *MAI, *STI,
*MCII, MCOptions, InputArgs);
}
// Keep output if no errors.
if (Res == 0)
Out->keep();
return Res;
}
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