1//===-- llvm-mc.cpp - Machine Code Hacking Driver -------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This utility is a simple driver that allows command line hacking on machine
11// code.
12//
13//===----------------------------------------------------------------------===//
14
15#include "llvm/MC/MCParser/AsmLexer.h"
16#include "llvm/MC/MCParser/MCAsmLexer.h"
17#include "llvm/MC/MCAsmBackend.h"
18#include "llvm/MC/MCAsmInfo.h"
19#include "llvm/MC/MCContext.h"
20#include "llvm/MC/MCCodeEmitter.h"
21#include "llvm/MC/MCInstPrinter.h"
22#include "llvm/MC/MCInstrInfo.h"
23#include "llvm/MC/MCObjectFileInfo.h"
24#include "llvm/MC/MCRegisterInfo.h"
25#include "llvm/MC/MCSectionMachO.h"
26#include "llvm/MC/MCStreamer.h"
27#include "llvm/MC/MCSubtargetInfo.h"
28#include "llvm/MC/MCTargetAsmParser.h"
29#include "llvm/MC/SubtargetFeature.h"
30#include "llvm/ADT/OwningPtr.h"
31#include "llvm/Support/CommandLine.h"
32#include "llvm/Support/FileUtilities.h"
33#include "llvm/Support/FormattedStream.h"
34#include "llvm/Support/ManagedStatic.h"
35#include "llvm/Support/MemoryBuffer.h"
36#include "llvm/Support/PrettyStackTrace.h"
37#include "llvm/Support/SourceMgr.h"
38#include "llvm/Support/ToolOutputFile.h"
39#include "llvm/Support/Host.h"
40#include "llvm/Support/Signals.h"
41#include "llvm/Support/TargetRegistry.h"
42#include "llvm/Support/TargetSelect.h"
43#include "llvm/Support/system_error.h"
44#include "Disassembler.h"
45using namespace llvm;
46
47static cl::opt<std::string>
48InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
49
50static cl::opt<std::string>
51OutputFilename("o", cl::desc("Output filename"),
52 cl::value_desc("filename"));
53
54static cl::opt<bool>
55ShowEncoding("show-encoding", cl::desc("Show instruction encodings"));
56
57static cl::opt<bool>
58ShowInst("show-inst", cl::desc("Show internal instruction representation"));
59
60static cl::opt<bool>
61ShowInstOperands("show-inst-operands",
62 cl::desc("Show instructions operands as parsed"));
63
64static cl::opt<unsigned>
65OutputAsmVariant("output-asm-variant",
66 cl::desc("Syntax variant to use for output printing"));
67
68static cl::opt<bool>
69RelaxAll("mc-relax-all", cl::desc("Relax all fixups"));
70
71static cl::opt<bool>
72NoExecStack("mc-no-exec-stack", cl::desc("File doesn't need an exec stack"));
73
74enum OutputFileType {
75 OFT_Null,
76 OFT_AssemblyFile,
77 OFT_ObjectFile
78};
79static cl::opt<OutputFileType>
80FileType("filetype", cl::init(OFT_AssemblyFile),
81 cl::desc("Choose an output file type:"),
82 cl::values(
83 clEnumValN(OFT_AssemblyFile, "asm",
84 "Emit an assembly ('.s') file"),
85 clEnumValN(OFT_Null, "null",
86 "Don't emit anything (for timing purposes)"),
87 clEnumValN(OFT_ObjectFile, "obj",
88 "Emit a native object ('.o') file"),
89 clEnumValEnd));
90
91static cl::list<std::string>
92IncludeDirs("I", cl::desc("Directory of include files"),
93 cl::value_desc("directory"), cl::Prefix);
94
95static cl::opt<std::string>
96ArchName("arch", cl::desc("Target arch to assemble for, "
97 "see -version for available targets"));
98
99static cl::opt<std::string>
100TripleName("triple", cl::desc("Target triple to assemble for, "
101 "see -version for available targets"));
102
103static cl::opt<std::string>
104MCPU("mcpu",
105 cl::desc("Target a specific cpu type (-mcpu=help for details)"),
106 cl::value_desc("cpu-name"),
107 cl::init(""));
108
109static cl::list<std::string>
110MAttrs("mattr",
111 cl::CommaSeparated,
112 cl::desc("Target specific attributes (-mattr=help for details)"),
113 cl::value_desc("a1,+a2,-a3,..."));
114
115static cl::opt<Reloc::Model>
116RelocModel("relocation-model",
117 cl::desc("Choose relocation model"),
118 cl::init(Reloc::Default),
119 cl::values(
120 clEnumValN(Reloc::Default, "default",
121 "Target default relocation model"),
122 clEnumValN(Reloc::Static, "static",
123 "Non-relocatable code"),
124 clEnumValN(Reloc::PIC_, "pic",
125 "Fully relocatable, position independent code"),
126 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
127 "Relocatable external references, non-relocatable code"),
128 clEnumValEnd));
129
130static cl::opt<llvm::CodeModel::Model>
131CMModel("code-model",
132 cl::desc("Choose code model"),
133 cl::init(CodeModel::Default),
134 cl::values(clEnumValN(CodeModel::Default, "default",
135 "Target default code model"),
136 clEnumValN(CodeModel::Small, "small",
137 "Small code model"),
138 clEnumValN(CodeModel::Kernel, "kernel",
139 "Kernel code model"),
140 clEnumValN(CodeModel::Medium, "medium",
141 "Medium code model"),
142 clEnumValN(CodeModel::Large, "large",
143 "Large code model"),
144 clEnumValEnd));
145
146static cl::opt<bool>
147NoInitialTextSection("n", cl::desc("Don't assume assembly file starts "
148 "in the text section"));
149
150static cl::opt<bool>
151SaveTempLabels("L", cl::desc("Don't discard temporary labels"));
152
153static cl::opt<bool>
154GenDwarfForAssembly("g", cl::desc("Generate dwarf debugging info for assembly "
155 "source files"));
156
157enum ActionType {
158 AC_AsLex,
159 AC_Assemble,
160 AC_Disassemble,
161 AC_EDisassemble
162};
163
164static cl::opt<ActionType>
165Action(cl::desc("Action to perform:"),
166 cl::init(AC_Assemble),
167 cl::values(clEnumValN(AC_AsLex, "as-lex",
168 "Lex tokens from a .s file"),
169 clEnumValN(AC_Assemble, "assemble",
170 "Assemble a .s file (default)"),
171 clEnumValN(AC_Disassemble, "disassemble",
172 "Disassemble strings of hex bytes"),
173 clEnumValN(AC_EDisassemble, "edis",
174 "Enhanced disassembly of strings of hex bytes"),
175 clEnumValEnd));
176
177static const Target *GetTarget(const char *ProgName) {
178 // Figure out the target triple.
179 if (TripleName.empty())
180 TripleName = sys::getDefaultTargetTriple();
181 Triple TheTriple(Triple::normalize(TripleName));
182
183 // Get the target specific parser.
184 std::string Error;
185 const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple,
186 Error);
187 if (!TheTarget) {
188 errs() << ProgName << ": " << Error;
189 return 0;
190 }
191
192 // Update the triple name and return the found target.
193 TripleName = TheTriple.getTriple();
194 return TheTarget;
195}
196
197static tool_output_file *GetOutputStream() {
198 if (OutputFilename == "")
199 OutputFilename = "-";
200
201 std::string Err;
202 tool_output_file *Out = new tool_output_file(OutputFilename.c_str(), Err,
203 raw_fd_ostream::F_Binary);
204 if (!Err.empty()) {
205 errs() << Err << '\n';
206 delete Out;
207 return 0;
208 }
209
210 return Out;
211}
212
213static std::string DwarfDebugFlags;
214static void setDwarfDebugFlags(int argc, char **argv) {
215 if (!getenv("RC_DEBUG_OPTIONS"))
216 return;
217 for (int i = 0; i < argc; i++) {
218 DwarfDebugFlags += argv[i];
219 if (i + 1 < argc)
220 DwarfDebugFlags += " ";
221 }
222}
223
224static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI, tool_output_file *Out) {
225
226 AsmLexer Lexer(MAI);
227 Lexer.setBuffer(SrcMgr.getMemoryBuffer(0));
228
229 bool Error = false;
230 while (Lexer.Lex().isNot(AsmToken::Eof)) {
231 AsmToken Tok = Lexer.getTok();
232
233 switch (Tok.getKind()) {
234 default:
235 SrcMgr.PrintMessage(Lexer.getLoc(), SourceMgr::DK_Warning,
236 "unknown token");
237 Error = true;
238 break;
239 case AsmToken::Error:
240 Error = true; // error already printed.
241 break;
242 case AsmToken::Identifier:
243 Out->os() << "identifier: " << Lexer.getTok().getString();
244 break;
245 case AsmToken::Integer:
246 Out->os() << "int: " << Lexer.getTok().getString();
247 break;
248 case AsmToken::Real:
249 Out->os() << "real: " << Lexer.getTok().getString();
250 break;
251 case AsmToken::Register:
252 Out->os() << "register: " << Lexer.getTok().getRegVal();
253 break;
254 case AsmToken::String:
255 Out->os() << "string: " << Lexer.getTok().getString();
256 break;
257
258 case AsmToken::Amp: Out->os() << "Amp"; break;
259 case AsmToken::AmpAmp: Out->os() << "AmpAmp"; break;
260 case AsmToken::At: Out->os() << "At"; break;
261 case AsmToken::Caret: Out->os() << "Caret"; break;
262 case AsmToken::Colon: Out->os() << "Colon"; break;
263 case AsmToken::Comma: Out->os() << "Comma"; break;
264 case AsmToken::Dollar: Out->os() << "Dollar"; break;
265 case AsmToken::Dot: Out->os() << "Dot"; break;
266 case AsmToken::EndOfStatement: Out->os() << "EndOfStatement"; break;
267 case AsmToken::Eof: Out->os() << "Eof"; break;
268 case AsmToken::Equal: Out->os() << "Equal"; break;
269 case AsmToken::EqualEqual: Out->os() << "EqualEqual"; break;
270 case AsmToken::Exclaim: Out->os() << "Exclaim"; break;
271 case AsmToken::ExclaimEqual: Out->os() << "ExclaimEqual"; break;
272 case AsmToken::Greater: Out->os() << "Greater"; break;
273 case AsmToken::GreaterEqual: Out->os() << "GreaterEqual"; break;
274 case AsmToken::GreaterGreater: Out->os() << "GreaterGreater"; break;
275 case AsmToken::Hash: Out->os() << "Hash"; break;
276 case AsmToken::LBrac: Out->os() << "LBrac"; break;
277 case AsmToken::LCurly: Out->os() << "LCurly"; break;
278 case AsmToken::LParen: Out->os() << "LParen"; break;
279 case AsmToken::Less: Out->os() << "Less"; break;
280 case AsmToken::LessEqual: Out->os() << "LessEqual"; break;
281 case AsmToken::LessGreater: Out->os() << "LessGreater"; break;
282 case AsmToken::LessLess: Out->os() << "LessLess"; break;
283 case AsmToken::Minus: Out->os() << "Minus"; break;
284 case AsmToken::Percent: Out->os() << "Percent"; break;
285 case AsmToken::Pipe: Out->os() << "Pipe"; break;
286 case AsmToken::PipePipe: Out->os() << "PipePipe"; break;
287 case AsmToken::Plus: Out->os() << "Plus"; break;
288 case AsmToken::RBrac: Out->os() << "RBrac"; break;
289 case AsmToken::RCurly: Out->os() << "RCurly"; break;
290 case AsmToken::RParen: Out->os() << "RParen"; break;
291 case AsmToken::Slash: Out->os() << "Slash"; break;
292 case AsmToken::Star: Out->os() << "Star"; break;
293 case AsmToken::Tilde: Out->os() << "Tilde"; break;
294 }
295
296 // Print the token string.
297 Out->os() << " (\"";
298 Out->os().write_escaped(Tok.getString());
299 Out->os() << "\")\n";
300 }
301
302 return Error;
303}
304
305static int AssembleInput(const char *ProgName, const Target *TheTarget,
306 SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str,
307 MCAsmInfo &MAI, MCSubtargetInfo &STI) {
308 OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr, Ctx,
309 Str, MAI));
310 OwningPtr<MCTargetAsmParser> TAP(TheTarget->createMCAsmParser(STI, *Parser));
311 if (!TAP) {
312 errs() << ProgName
313 << ": error: this target does not support assembly parsing.\n";
314 return 1;
315 }
316
317 Parser->setShowParsedOperands(ShowInstOperands);
318 Parser->setTargetParser(*TAP.get());
319
320 int Res = Parser->Run(NoInitialTextSection);
321
322 return Res;
323}
324
325int main(int argc, char **argv) {
326 // Print a stack trace if we signal out.
327 sys::PrintStackTraceOnErrorSignal();
328 PrettyStackTraceProgram X(argc, argv);
329 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
330
331 // Initialize targets and assembly printers/parsers.
332 llvm::InitializeAllTargetInfos();
333 llvm::InitializeAllTargetMCs();
334 llvm::InitializeAllAsmParsers();
335 llvm::InitializeAllDisassemblers();
336
337 // Register the target printer for --version.
338 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
339
340 cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n");
341 TripleName = Triple::normalize(TripleName);
342 setDwarfDebugFlags(argc, argv);
343
344 const char *ProgName = argv[0];
345 const Target *TheTarget = GetTarget(ProgName);
346 if (!TheTarget)
347 return 1;
348
349 OwningPtr<MemoryBuffer> BufferPtr;
350 if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFilename, BufferPtr)) {
351 errs() << ProgName << ": " << ec.message() << '\n';
352 return 1;
353 }
354 MemoryBuffer *Buffer = BufferPtr.take();
355
356 SourceMgr SrcMgr;
357
358 // Tell SrcMgr about this buffer, which is what the parser will pick up.
359 SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
360
361 // Record the location of the include directories so that the lexer can find
362 // it later.
363 SrcMgr.setIncludeDirs(IncludeDirs);
364
365
366 llvm::OwningPtr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(TripleName));
367 assert(MAI && "Unable to create target asm info!");
368
369 llvm::OwningPtr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
370 assert(MRI && "Unable to create target register info!");
371
372 // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and
373 // MCObjectFileInfo needs a MCContext reference in order to initialize itself.
374 OwningPtr<MCObjectFileInfo> MOFI(new MCObjectFileInfo());
375 MCContext Ctx(*MAI, *MRI, MOFI.get(), &SrcMgr);
376 MOFI->InitMCObjectFileInfo(TripleName, RelocModel, CMModel, Ctx);
377
378 if (SaveTempLabels)
379 Ctx.setAllowTemporaryLabels(false);
380
381 Ctx.setGenDwarfForAssembly(GenDwarfForAssembly);
382 if (!DwarfDebugFlags.empty())
383 Ctx.setDwarfDebugFlags(StringRef(DwarfDebugFlags));
384
385 // Package up features to be passed to target/subtarget
386 std::string FeaturesStr;
387 if (MAttrs.size()) {
388 SubtargetFeatures Features;
389 for (unsigned i = 0; i != MAttrs.size(); ++i)
390 Features.AddFeature(MAttrs[i]);
391 FeaturesStr = Features.getString();
392 }
393
394 OwningPtr<tool_output_file> Out(GetOutputStream());
395 if (!Out)
396 return 1;
397
398 formatted_raw_ostream FOS(Out->os());
399 OwningPtr<MCStreamer> Str;
400
401 OwningPtr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
402 OwningPtr<MCSubtargetInfo>
403 STI(TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr));
404
405 if (FileType == OFT_AssemblyFile) {
406 MCInstPrinter *IP =
407 TheTarget->createMCInstPrinter(OutputAsmVariant, *MAI, *MCII, *MRI, *STI);
408 MCCodeEmitter *CE = 0;
409 MCAsmBackend *MAB = 0;
410 if (ShowEncoding) {
411 CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, *STI, Ctx);
| 1//===-- llvm-mc.cpp - Machine Code Hacking Driver -------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This utility is a simple driver that allows command line hacking on machine
11// code.
12//
13//===----------------------------------------------------------------------===//
14
15#include "llvm/MC/MCParser/AsmLexer.h"
16#include "llvm/MC/MCParser/MCAsmLexer.h"
17#include "llvm/MC/MCAsmBackend.h"
18#include "llvm/MC/MCAsmInfo.h"
19#include "llvm/MC/MCContext.h"
20#include "llvm/MC/MCCodeEmitter.h"
21#include "llvm/MC/MCInstPrinter.h"
22#include "llvm/MC/MCInstrInfo.h"
23#include "llvm/MC/MCObjectFileInfo.h"
24#include "llvm/MC/MCRegisterInfo.h"
25#include "llvm/MC/MCSectionMachO.h"
26#include "llvm/MC/MCStreamer.h"
27#include "llvm/MC/MCSubtargetInfo.h"
28#include "llvm/MC/MCTargetAsmParser.h"
29#include "llvm/MC/SubtargetFeature.h"
30#include "llvm/ADT/OwningPtr.h"
31#include "llvm/Support/CommandLine.h"
32#include "llvm/Support/FileUtilities.h"
33#include "llvm/Support/FormattedStream.h"
34#include "llvm/Support/ManagedStatic.h"
35#include "llvm/Support/MemoryBuffer.h"
36#include "llvm/Support/PrettyStackTrace.h"
37#include "llvm/Support/SourceMgr.h"
38#include "llvm/Support/ToolOutputFile.h"
39#include "llvm/Support/Host.h"
40#include "llvm/Support/Signals.h"
41#include "llvm/Support/TargetRegistry.h"
42#include "llvm/Support/TargetSelect.h"
43#include "llvm/Support/system_error.h"
44#include "Disassembler.h"
45using namespace llvm;
46
47static cl::opt<std::string>
48InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
49
50static cl::opt<std::string>
51OutputFilename("o", cl::desc("Output filename"),
52 cl::value_desc("filename"));
53
54static cl::opt<bool>
55ShowEncoding("show-encoding", cl::desc("Show instruction encodings"));
56
57static cl::opt<bool>
58ShowInst("show-inst", cl::desc("Show internal instruction representation"));
59
60static cl::opt<bool>
61ShowInstOperands("show-inst-operands",
62 cl::desc("Show instructions operands as parsed"));
63
64static cl::opt<unsigned>
65OutputAsmVariant("output-asm-variant",
66 cl::desc("Syntax variant to use for output printing"));
67
68static cl::opt<bool>
69RelaxAll("mc-relax-all", cl::desc("Relax all fixups"));
70
71static cl::opt<bool>
72NoExecStack("mc-no-exec-stack", cl::desc("File doesn't need an exec stack"));
73
74enum OutputFileType {
75 OFT_Null,
76 OFT_AssemblyFile,
77 OFT_ObjectFile
78};
79static cl::opt<OutputFileType>
80FileType("filetype", cl::init(OFT_AssemblyFile),
81 cl::desc("Choose an output file type:"),
82 cl::values(
83 clEnumValN(OFT_AssemblyFile, "asm",
84 "Emit an assembly ('.s') file"),
85 clEnumValN(OFT_Null, "null",
86 "Don't emit anything (for timing purposes)"),
87 clEnumValN(OFT_ObjectFile, "obj",
88 "Emit a native object ('.o') file"),
89 clEnumValEnd));
90
91static cl::list<std::string>
92IncludeDirs("I", cl::desc("Directory of include files"),
93 cl::value_desc("directory"), cl::Prefix);
94
95static cl::opt<std::string>
96ArchName("arch", cl::desc("Target arch to assemble for, "
97 "see -version for available targets"));
98
99static cl::opt<std::string>
100TripleName("triple", cl::desc("Target triple to assemble for, "
101 "see -version for available targets"));
102
103static cl::opt<std::string>
104MCPU("mcpu",
105 cl::desc("Target a specific cpu type (-mcpu=help for details)"),
106 cl::value_desc("cpu-name"),
107 cl::init(""));
108
109static cl::list<std::string>
110MAttrs("mattr",
111 cl::CommaSeparated,
112 cl::desc("Target specific attributes (-mattr=help for details)"),
113 cl::value_desc("a1,+a2,-a3,..."));
114
115static cl::opt<Reloc::Model>
116RelocModel("relocation-model",
117 cl::desc("Choose relocation model"),
118 cl::init(Reloc::Default),
119 cl::values(
120 clEnumValN(Reloc::Default, "default",
121 "Target default relocation model"),
122 clEnumValN(Reloc::Static, "static",
123 "Non-relocatable code"),
124 clEnumValN(Reloc::PIC_, "pic",
125 "Fully relocatable, position independent code"),
126 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
127 "Relocatable external references, non-relocatable code"),
128 clEnumValEnd));
129
130static cl::opt<llvm::CodeModel::Model>
131CMModel("code-model",
132 cl::desc("Choose code model"),
133 cl::init(CodeModel::Default),
134 cl::values(clEnumValN(CodeModel::Default, "default",
135 "Target default code model"),
136 clEnumValN(CodeModel::Small, "small",
137 "Small code model"),
138 clEnumValN(CodeModel::Kernel, "kernel",
139 "Kernel code model"),
140 clEnumValN(CodeModel::Medium, "medium",
141 "Medium code model"),
142 clEnumValN(CodeModel::Large, "large",
143 "Large code model"),
144 clEnumValEnd));
145
146static cl::opt<bool>
147NoInitialTextSection("n", cl::desc("Don't assume assembly file starts "
148 "in the text section"));
149
150static cl::opt<bool>
151SaveTempLabels("L", cl::desc("Don't discard temporary labels"));
152
153static cl::opt<bool>
154GenDwarfForAssembly("g", cl::desc("Generate dwarf debugging info for assembly "
155 "source files"));
156
157enum ActionType {
158 AC_AsLex,
159 AC_Assemble,
160 AC_Disassemble,
161 AC_EDisassemble
162};
163
164static cl::opt<ActionType>
165Action(cl::desc("Action to perform:"),
166 cl::init(AC_Assemble),
167 cl::values(clEnumValN(AC_AsLex, "as-lex",
168 "Lex tokens from a .s file"),
169 clEnumValN(AC_Assemble, "assemble",
170 "Assemble a .s file (default)"),
171 clEnumValN(AC_Disassemble, "disassemble",
172 "Disassemble strings of hex bytes"),
173 clEnumValN(AC_EDisassemble, "edis",
174 "Enhanced disassembly of strings of hex bytes"),
175 clEnumValEnd));
176
177static const Target *GetTarget(const char *ProgName) {
178 // Figure out the target triple.
179 if (TripleName.empty())
180 TripleName = sys::getDefaultTargetTriple();
181 Triple TheTriple(Triple::normalize(TripleName));
182
183 // Get the target specific parser.
184 std::string Error;
185 const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple,
186 Error);
187 if (!TheTarget) {
188 errs() << ProgName << ": " << Error;
189 return 0;
190 }
191
192 // Update the triple name and return the found target.
193 TripleName = TheTriple.getTriple();
194 return TheTarget;
195}
196
197static tool_output_file *GetOutputStream() {
198 if (OutputFilename == "")
199 OutputFilename = "-";
200
201 std::string Err;
202 tool_output_file *Out = new tool_output_file(OutputFilename.c_str(), Err,
203 raw_fd_ostream::F_Binary);
204 if (!Err.empty()) {
205 errs() << Err << '\n';
206 delete Out;
207 return 0;
208 }
209
210 return Out;
211}
212
213static std::string DwarfDebugFlags;
214static void setDwarfDebugFlags(int argc, char **argv) {
215 if (!getenv("RC_DEBUG_OPTIONS"))
216 return;
217 for (int i = 0; i < argc; i++) {
218 DwarfDebugFlags += argv[i];
219 if (i + 1 < argc)
220 DwarfDebugFlags += " ";
221 }
222}
223
224static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI, tool_output_file *Out) {
225
226 AsmLexer Lexer(MAI);
227 Lexer.setBuffer(SrcMgr.getMemoryBuffer(0));
228
229 bool Error = false;
230 while (Lexer.Lex().isNot(AsmToken::Eof)) {
231 AsmToken Tok = Lexer.getTok();
232
233 switch (Tok.getKind()) {
234 default:
235 SrcMgr.PrintMessage(Lexer.getLoc(), SourceMgr::DK_Warning,
236 "unknown token");
237 Error = true;
238 break;
239 case AsmToken::Error:
240 Error = true; // error already printed.
241 break;
242 case AsmToken::Identifier:
243 Out->os() << "identifier: " << Lexer.getTok().getString();
244 break;
245 case AsmToken::Integer:
246 Out->os() << "int: " << Lexer.getTok().getString();
247 break;
248 case AsmToken::Real:
249 Out->os() << "real: " << Lexer.getTok().getString();
250 break;
251 case AsmToken::Register:
252 Out->os() << "register: " << Lexer.getTok().getRegVal();
253 break;
254 case AsmToken::String:
255 Out->os() << "string: " << Lexer.getTok().getString();
256 break;
257
258 case AsmToken::Amp: Out->os() << "Amp"; break;
259 case AsmToken::AmpAmp: Out->os() << "AmpAmp"; break;
260 case AsmToken::At: Out->os() << "At"; break;
261 case AsmToken::Caret: Out->os() << "Caret"; break;
262 case AsmToken::Colon: Out->os() << "Colon"; break;
263 case AsmToken::Comma: Out->os() << "Comma"; break;
264 case AsmToken::Dollar: Out->os() << "Dollar"; break;
265 case AsmToken::Dot: Out->os() << "Dot"; break;
266 case AsmToken::EndOfStatement: Out->os() << "EndOfStatement"; break;
267 case AsmToken::Eof: Out->os() << "Eof"; break;
268 case AsmToken::Equal: Out->os() << "Equal"; break;
269 case AsmToken::EqualEqual: Out->os() << "EqualEqual"; break;
270 case AsmToken::Exclaim: Out->os() << "Exclaim"; break;
271 case AsmToken::ExclaimEqual: Out->os() << "ExclaimEqual"; break;
272 case AsmToken::Greater: Out->os() << "Greater"; break;
273 case AsmToken::GreaterEqual: Out->os() << "GreaterEqual"; break;
274 case AsmToken::GreaterGreater: Out->os() << "GreaterGreater"; break;
275 case AsmToken::Hash: Out->os() << "Hash"; break;
276 case AsmToken::LBrac: Out->os() << "LBrac"; break;
277 case AsmToken::LCurly: Out->os() << "LCurly"; break;
278 case AsmToken::LParen: Out->os() << "LParen"; break;
279 case AsmToken::Less: Out->os() << "Less"; break;
280 case AsmToken::LessEqual: Out->os() << "LessEqual"; break;
281 case AsmToken::LessGreater: Out->os() << "LessGreater"; break;
282 case AsmToken::LessLess: Out->os() << "LessLess"; break;
283 case AsmToken::Minus: Out->os() << "Minus"; break;
284 case AsmToken::Percent: Out->os() << "Percent"; break;
285 case AsmToken::Pipe: Out->os() << "Pipe"; break;
286 case AsmToken::PipePipe: Out->os() << "PipePipe"; break;
287 case AsmToken::Plus: Out->os() << "Plus"; break;
288 case AsmToken::RBrac: Out->os() << "RBrac"; break;
289 case AsmToken::RCurly: Out->os() << "RCurly"; break;
290 case AsmToken::RParen: Out->os() << "RParen"; break;
291 case AsmToken::Slash: Out->os() << "Slash"; break;
292 case AsmToken::Star: Out->os() << "Star"; break;
293 case AsmToken::Tilde: Out->os() << "Tilde"; break;
294 }
295
296 // Print the token string.
297 Out->os() << " (\"";
298 Out->os().write_escaped(Tok.getString());
299 Out->os() << "\")\n";
300 }
301
302 return Error;
303}
304
305static int AssembleInput(const char *ProgName, const Target *TheTarget,
306 SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str,
307 MCAsmInfo &MAI, MCSubtargetInfo &STI) {
308 OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr, Ctx,
309 Str, MAI));
310 OwningPtr<MCTargetAsmParser> TAP(TheTarget->createMCAsmParser(STI, *Parser));
311 if (!TAP) {
312 errs() << ProgName
313 << ": error: this target does not support assembly parsing.\n";
314 return 1;
315 }
316
317 Parser->setShowParsedOperands(ShowInstOperands);
318 Parser->setTargetParser(*TAP.get());
319
320 int Res = Parser->Run(NoInitialTextSection);
321
322 return Res;
323}
324
325int main(int argc, char **argv) {
326 // Print a stack trace if we signal out.
327 sys::PrintStackTraceOnErrorSignal();
328 PrettyStackTraceProgram X(argc, argv);
329 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
330
331 // Initialize targets and assembly printers/parsers.
332 llvm::InitializeAllTargetInfos();
333 llvm::InitializeAllTargetMCs();
334 llvm::InitializeAllAsmParsers();
335 llvm::InitializeAllDisassemblers();
336
337 // Register the target printer for --version.
338 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
339
340 cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n");
341 TripleName = Triple::normalize(TripleName);
342 setDwarfDebugFlags(argc, argv);
343
344 const char *ProgName = argv[0];
345 const Target *TheTarget = GetTarget(ProgName);
346 if (!TheTarget)
347 return 1;
348
349 OwningPtr<MemoryBuffer> BufferPtr;
350 if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFilename, BufferPtr)) {
351 errs() << ProgName << ": " << ec.message() << '\n';
352 return 1;
353 }
354 MemoryBuffer *Buffer = BufferPtr.take();
355
356 SourceMgr SrcMgr;
357
358 // Tell SrcMgr about this buffer, which is what the parser will pick up.
359 SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
360
361 // Record the location of the include directories so that the lexer can find
362 // it later.
363 SrcMgr.setIncludeDirs(IncludeDirs);
364
365
366 llvm::OwningPtr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(TripleName));
367 assert(MAI && "Unable to create target asm info!");
368
369 llvm::OwningPtr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
370 assert(MRI && "Unable to create target register info!");
371
372 // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and
373 // MCObjectFileInfo needs a MCContext reference in order to initialize itself.
374 OwningPtr<MCObjectFileInfo> MOFI(new MCObjectFileInfo());
375 MCContext Ctx(*MAI, *MRI, MOFI.get(), &SrcMgr);
376 MOFI->InitMCObjectFileInfo(TripleName, RelocModel, CMModel, Ctx);
377
378 if (SaveTempLabels)
379 Ctx.setAllowTemporaryLabels(false);
380
381 Ctx.setGenDwarfForAssembly(GenDwarfForAssembly);
382 if (!DwarfDebugFlags.empty())
383 Ctx.setDwarfDebugFlags(StringRef(DwarfDebugFlags));
384
385 // Package up features to be passed to target/subtarget
386 std::string FeaturesStr;
387 if (MAttrs.size()) {
388 SubtargetFeatures Features;
389 for (unsigned i = 0; i != MAttrs.size(); ++i)
390 Features.AddFeature(MAttrs[i]);
391 FeaturesStr = Features.getString();
392 }
393
394 OwningPtr<tool_output_file> Out(GetOutputStream());
395 if (!Out)
396 return 1;
397
398 formatted_raw_ostream FOS(Out->os());
399 OwningPtr<MCStreamer> Str;
400
401 OwningPtr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
402 OwningPtr<MCSubtargetInfo>
403 STI(TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr));
404
405 if (FileType == OFT_AssemblyFile) {
406 MCInstPrinter *IP =
407 TheTarget->createMCInstPrinter(OutputAsmVariant, *MAI, *MCII, *MRI, *STI);
408 MCCodeEmitter *CE = 0;
409 MCAsmBackend *MAB = 0;
410 if (ShowEncoding) {
411 CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, *STI, Ctx);
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