1 //===-- llvm-mc.cpp - Machine Code Hacking 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 // This utility is a simple driver that allows command line hacking on machine
13 //===----------------------------------------------------------------------===//
15 #include "llvm/MC/MCParser/AsmLexer.h"
16 #include "llvm/MC/MCParser/MCAsmLexer.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCCodeEmitter.h"
19 #include "llvm/MC/MCInstPrinter.h"
20 #include "llvm/MC/MCSectionMachO.h"
21 #include "llvm/MC/MCStreamer.h"
22 #include "llvm/Target/TargetAsmBackend.h"
23 #include "llvm/Target/TargetAsmParser.h"
24 #include "llvm/Target/TargetData.h"
25 #include "llvm/Target/TargetRegistry.h"
26 #include "llvm/Target/TargetMachine.h" // FIXME.
27 #include "llvm/Target/TargetSelect.h"
28 #include "llvm/ADT/OwningPtr.h"
29 #include "llvm/Support/CommandLine.h"
30 #include "llvm/Support/FileUtilities.h"
31 #include "llvm/Support/FormattedStream.h"
32 #include "llvm/Support/ManagedStatic.h"
33 #include "llvm/Support/MemoryBuffer.h"
34 #include "llvm/Support/PrettyStackTrace.h"
35 #include "llvm/Support/SourceMgr.h"
36 #include "llvm/Support/ToolOutputFile.h"
37 #include "llvm/System/Host.h"
38 #include "llvm/System/Signals.h"
39 #include "Disassembler.h"
42 static cl::opt<std::string>
43 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
45 static cl::opt<std::string>
46 OutputFilename("o", cl::desc("Output filename"),
47 cl::value_desc("filename"));
50 ShowEncoding("show-encoding", cl::desc("Show instruction encodings"));
53 ShowInst("show-inst", cl::desc("Show internal instruction representation"));
56 ShowInstOperands("show-inst-operands",
57 cl::desc("Show instructions operands as parsed"));
59 static cl::opt<unsigned>
60 OutputAsmVariant("output-asm-variant",
61 cl::desc("Syntax variant to use for output printing"));
64 RelaxAll("mc-relax-all", cl::desc("Relax all fixups"));
67 EnableLogging("enable-api-logging", cl::desc("Enable MC API logging"));
74 static cl::opt<OutputFileType>
75 FileType("filetype", cl::init(OFT_AssemblyFile),
76 cl::desc("Choose an output file type:"),
78 clEnumValN(OFT_AssemblyFile, "asm",
79 "Emit an assembly ('.s') file"),
80 clEnumValN(OFT_Null, "null",
81 "Don't emit anything (for timing purposes)"),
82 clEnumValN(OFT_ObjectFile, "obj",
83 "Emit a native object ('.o') file"),
86 static cl::list<std::string>
87 IncludeDirs("I", cl::desc("Directory of include files"),
88 cl::value_desc("directory"), cl::Prefix);
90 static cl::opt<std::string>
91 ArchName("arch", cl::desc("Target arch to assemble for, "
92 "see -version for available targets"));
94 static cl::opt<std::string>
95 TripleName("triple", cl::desc("Target triple to assemble for, "
96 "see -version for available targets"));
99 NoInitialTextSection("n", cl::desc(
100 "Don't assume assembly file starts in the text section"));
109 static cl::opt<ActionType>
110 Action(cl::desc("Action to perform:"),
111 cl::init(AC_Assemble),
112 cl::values(clEnumValN(AC_AsLex, "as-lex",
113 "Lex tokens from a .s file"),
114 clEnumValN(AC_Assemble, "assemble",
115 "Assemble a .s file (default)"),
116 clEnumValN(AC_Disassemble, "disassemble",
117 "Disassemble strings of hex bytes"),
118 clEnumValN(AC_EDisassemble, "edis",
119 "Enhanced disassembly of strings of hex bytes"),
122 static const Target *GetTarget(const char *ProgName) {
123 // Figure out the target triple.
124 if (TripleName.empty())
125 TripleName = sys::getHostTriple();
126 if (!ArchName.empty()) {
127 llvm::Triple TT(TripleName);
128 TT.setArchName(ArchName);
129 TripleName = TT.str();
132 // Get the target specific parser.
134 const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
138 errs() << ProgName << ": error: unable to get target for '" << TripleName
139 << "', see --version and --triple.\n";
143 static tool_output_file *GetOutputStream() {
144 if (OutputFilename == "")
145 OutputFilename = "-";
148 tool_output_file *Out = new tool_output_file(OutputFilename.c_str(), Err,
149 raw_fd_ostream::F_Binary);
151 errs() << Err << '\n';
159 static int AsLexInput(const char *ProgName) {
160 std::string ErrorMessage;
161 MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename,
164 errs() << ProgName << ": ";
165 if (ErrorMessage.size())
166 errs() << ErrorMessage << "\n";
168 errs() << "input file didn't read correctly.\n";
174 // Tell SrcMgr about this buffer, which is what TGParser will pick up.
175 SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
177 // Record the location of the include directories so that the lexer can find
179 SrcMgr.setIncludeDirs(IncludeDirs);
181 const Target *TheTarget = GetTarget(ProgName);
185 llvm::OwningPtr<MCAsmInfo> MAI(TheTarget->createAsmInfo(TripleName));
186 assert(MAI && "Unable to create target asm info!");
188 AsmLexer Lexer(*MAI);
189 Lexer.setBuffer(SrcMgr.getMemoryBuffer(0));
191 OwningPtr<tool_output_file> Out(GetOutputStream());
196 while (Lexer.Lex().isNot(AsmToken::Eof)) {
197 AsmToken Tok = Lexer.getTok();
199 switch (Tok.getKind()) {
201 SrcMgr.PrintMessage(Lexer.getLoc(), "unknown token", "warning");
204 case AsmToken::Error:
205 Error = true; // error already printed.
207 case AsmToken::Identifier:
208 Out->os() << "identifier: " << Lexer.getTok().getString();
210 case AsmToken::Integer:
211 Out->os() << "int: " << Lexer.getTok().getString();
214 Out->os() << "real: " << Lexer.getTok().getString();
216 case AsmToken::Register:
217 Out->os() << "register: " << Lexer.getTok().getRegVal();
219 case AsmToken::String:
220 Out->os() << "string: " << Lexer.getTok().getString();
223 case AsmToken::Amp: Out->os() << "Amp"; break;
224 case AsmToken::AmpAmp: Out->os() << "AmpAmp"; break;
225 case AsmToken::At: Out->os() << "At"; break;
226 case AsmToken::Caret: Out->os() << "Caret"; break;
227 case AsmToken::Colon: Out->os() << "Colon"; break;
228 case AsmToken::Comma: Out->os() << "Comma"; break;
229 case AsmToken::Dollar: Out->os() << "Dollar"; break;
230 case AsmToken::Dot: Out->os() << "Dot"; break;
231 case AsmToken::EndOfStatement: Out->os() << "EndOfStatement"; break;
232 case AsmToken::Eof: Out->os() << "Eof"; break;
233 case AsmToken::Equal: Out->os() << "Equal"; break;
234 case AsmToken::EqualEqual: Out->os() << "EqualEqual"; break;
235 case AsmToken::Exclaim: Out->os() << "Exclaim"; break;
236 case AsmToken::ExclaimEqual: Out->os() << "ExclaimEqual"; break;
237 case AsmToken::Greater: Out->os() << "Greater"; break;
238 case AsmToken::GreaterEqual: Out->os() << "GreaterEqual"; break;
239 case AsmToken::GreaterGreater: Out->os() << "GreaterGreater"; break;
240 case AsmToken::Hash: Out->os() << "Hash"; break;
241 case AsmToken::LBrac: Out->os() << "LBrac"; break;
242 case AsmToken::LCurly: Out->os() << "LCurly"; break;
243 case AsmToken::LParen: Out->os() << "LParen"; break;
244 case AsmToken::Less: Out->os() << "Less"; break;
245 case AsmToken::LessEqual: Out->os() << "LessEqual"; break;
246 case AsmToken::LessGreater: Out->os() << "LessGreater"; break;
247 case AsmToken::LessLess: Out->os() << "LessLess"; break;
248 case AsmToken::Minus: Out->os() << "Minus"; break;
249 case AsmToken::Percent: Out->os() << "Percent"; break;
250 case AsmToken::Pipe: Out->os() << "Pipe"; break;
251 case AsmToken::PipePipe: Out->os() << "PipePipe"; break;
252 case AsmToken::Plus: Out->os() << "Plus"; break;
253 case AsmToken::RBrac: Out->os() << "RBrac"; break;
254 case AsmToken::RCurly: Out->os() << "RCurly"; break;
255 case AsmToken::RParen: Out->os() << "RParen"; break;
256 case AsmToken::Slash: Out->os() << "Slash"; break;
257 case AsmToken::Star: Out->os() << "Star"; break;
258 case AsmToken::Tilde: Out->os() << "Tilde"; break;
261 // Print the token string.
263 Out->os().write_escaped(Tok.getString());
264 Out->os() << "\")\n";
267 // Keep output if no errors.
268 if (Error == 0) Out->keep();
273 static int AssembleInput(const char *ProgName) {
274 const Target *TheTarget = GetTarget(ProgName);
279 MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename, &Error);
281 errs() << ProgName << ": ";
283 errs() << Error << "\n";
285 errs() << "input file didn't read correctly.\n";
291 // Tell SrcMgr about this buffer, which is what the parser will pick up.
292 SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
294 // Record the location of the include directories so that the lexer can find
296 SrcMgr.setIncludeDirs(IncludeDirs);
299 llvm::OwningPtr<MCAsmInfo> MAI(TheTarget->createAsmInfo(TripleName));
300 assert(MAI && "Unable to create target asm info!");
304 // FIXME: We shouldn't need to do this (and link in codegen).
305 OwningPtr<TargetMachine> TM(TheTarget->createTargetMachine(TripleName, ""));
308 errs() << ProgName << ": error: could not create target for triple '"
309 << TripleName << "'.\n";
313 OwningPtr<tool_output_file> Out(GetOutputStream());
317 formatted_raw_ostream FOS(Out->os());
318 OwningPtr<MCStreamer> Str;
320 if (FileType == OFT_AssemblyFile) {
322 TheTarget->createMCInstPrinter(OutputAsmVariant, *MAI);
323 MCCodeEmitter *CE = 0;
325 CE = TheTarget->createCodeEmitter(*TM, Ctx);
326 Str.reset(createAsmStreamer(Ctx, FOS,
327 TM->getTargetData()->isLittleEndian(),
328 /*asmverbose*/true, IP, CE, ShowInst));
329 } else if (FileType == OFT_Null) {
330 Str.reset(createNullStreamer(Ctx));
332 assert(FileType == OFT_ObjectFile && "Invalid file type!");
333 MCCodeEmitter *CE = TheTarget->createCodeEmitter(*TM, Ctx);
334 TargetAsmBackend *TAB = TheTarget->createAsmBackend(TripleName);
335 Str.reset(TheTarget->createObjectStreamer(TripleName, Ctx, *TAB,
340 Str.reset(createLoggingStreamer(Str.take(), errs()));
343 OwningPtr<MCAsmParser> Parser(createMCAsmParser(*TheTarget, SrcMgr, Ctx,
345 OwningPtr<TargetAsmParser> TAP(TheTarget->createAsmParser(*Parser, *TM));
348 << ": error: this target does not support assembly parsing.\n";
352 Parser->setShowParsedOperands(ShowInstOperands);
353 Parser->setTargetParser(*TAP.get());
355 int Res = Parser->Run(NoInitialTextSection);
357 // Keep output if no errors.
358 if (Res == 0) Out->keep();
363 static int DisassembleInput(const char *ProgName, bool Enhanced) {
364 const Target *TheTarget = GetTarget(ProgName);
368 std::string ErrorMessage;
370 MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename,
374 errs() << ProgName << ": ";
375 if (ErrorMessage.size())
376 errs() << ErrorMessage << "\n";
378 errs() << "input file didn't read correctly.\n";
382 OwningPtr<tool_output_file> Out(GetOutputStream());
388 Res = Disassembler::disassembleEnhanced(TripleName, *Buffer, Out->os());
390 Res = Disassembler::disassemble(*TheTarget, TripleName, *Buffer, Out->os());
392 // Keep output if no errors.
393 if (Res == 0) Out->keep();
399 int main(int argc, char **argv) {
400 // Print a stack trace if we signal out.
401 sys::PrintStackTraceOnErrorSignal();
402 PrettyStackTraceProgram X(argc, argv);
403 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
405 // Initialize targets and assembly printers/parsers.
406 llvm::InitializeAllTargetInfos();
407 // FIXME: We shouldn't need to initialize the Target(Machine)s.
408 llvm::InitializeAllTargets();
409 llvm::InitializeAllAsmPrinters();
410 llvm::InitializeAllAsmParsers();
411 llvm::InitializeAllDisassemblers();
413 cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n");
414 TripleName = Triple::normalize(TripleName);
419 return AsLexInput(argv[0]);
421 return AssembleInput(argv[0]);
423 return DisassembleInput(argv[0], false);
424 case AC_EDisassemble:
425 return DisassembleInput(argv[0], true);