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/MCContext.h"
16 #include "llvm/MC/MCStreamer.h"
17 #include "llvm/ADT/OwningPtr.h"
18 #include "llvm/Support/CommandLine.h"
19 #include "llvm/Support/ManagedStatic.h"
20 #include "llvm/Support/MemoryBuffer.h"
21 #include "llvm/Support/PrettyStackTrace.h"
22 #include "llvm/Support/SourceMgr.h"
23 #include "llvm/Support/raw_ostream.h"
24 #include "llvm/System/Signals.h"
25 #include "llvm/Target/TargetAsmParser.h"
26 #include "llvm/Target/TargetRegistry.h"
27 #include "llvm/Target/TargetSelect.h"
28 #include "AsmParser.h"
31 static cl::opt<std::string>
32 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
34 static cl::opt<std::string>
35 OutputFilename("o", cl::desc("Output filename"),
36 cl::value_desc("filename"));
38 static cl::list<std::string>
39 IncludeDirs("I", cl::desc("Directory of include files"),
40 cl::value_desc("directory"), cl::Prefix);
42 static cl::opt<std::string>
43 TripleName("triple", cl::desc("Target triple to assemble for,"
44 "see -version for available targets"),
45 cl::init(LLVM_HOSTTRIPLE));
52 static cl::opt<ActionType>
53 Action(cl::desc("Action to perform:"),
54 cl::init(AC_Assemble),
55 cl::values(clEnumValN(AC_AsLex, "as-lex",
56 "Lex tokens from a .s file"),
57 clEnumValN(AC_Assemble, "assemble",
58 "Assemble a .s file (default)"),
61 static int AsLexInput(const char *ProgName) {
62 std::string ErrorMessage;
63 MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename,
66 errs() << ProgName << ": ";
67 if (ErrorMessage.size())
68 errs() << ErrorMessage << "\n";
70 errs() << "input file didn't read correctly.\n";
76 // Tell SrcMgr about this buffer, which is what TGParser will pick up.
77 SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
79 // Record the location of the include directories so that the lexer can find
81 SrcMgr.setIncludeDirs(IncludeDirs);
83 AsmLexer Lexer(SrcMgr);
87 while (Lexer.Lex().isNot(AsmToken::Eof)) {
88 switch (Lexer.getKind()) {
90 Lexer.PrintMessage(Lexer.getLoc(), "unknown token", "warning");
94 Error = true; // error already printed.
96 case AsmToken::Identifier:
97 outs() << "identifier: " << Lexer.getTok().getString() << '\n';
99 case AsmToken::Register:
100 outs() << "register: " << Lexer.getTok().getString() << '\n';
102 case AsmToken::String:
103 outs() << "string: " << Lexer.getTok().getString() << '\n';
105 case AsmToken::Integer:
106 outs() << "int: " << Lexer.getTok().getString() << '\n';
109 case AsmToken::Amp: outs() << "Amp\n"; break;
110 case AsmToken::AmpAmp: outs() << "AmpAmp\n"; break;
111 case AsmToken::Caret: outs() << "Caret\n"; break;
112 case AsmToken::Colon: outs() << "Colon\n"; break;
113 case AsmToken::Comma: outs() << "Comma\n"; break;
114 case AsmToken::Dollar: outs() << "Dollar\n"; break;
115 case AsmToken::EndOfStatement: outs() << "EndOfStatement\n"; break;
116 case AsmToken::Eof: outs() << "Eof\n"; break;
117 case AsmToken::Equal: outs() << "Equal\n"; break;
118 case AsmToken::EqualEqual: outs() << "EqualEqual\n"; break;
119 case AsmToken::Exclaim: outs() << "Exclaim\n"; break;
120 case AsmToken::ExclaimEqual: outs() << "ExclaimEqual\n"; break;
121 case AsmToken::Greater: outs() << "Greater\n"; break;
122 case AsmToken::GreaterEqual: outs() << "GreaterEqual\n"; break;
123 case AsmToken::GreaterGreater: outs() << "GreaterGreater\n"; break;
124 case AsmToken::LParen: outs() << "LParen\n"; break;
125 case AsmToken::Less: outs() << "Less\n"; break;
126 case AsmToken::LessEqual: outs() << "LessEqual\n"; break;
127 case AsmToken::LessGreater: outs() << "LessGreater\n"; break;
128 case AsmToken::LessLess: outs() << "LessLess\n"; break;
129 case AsmToken::Minus: outs() << "Minus\n"; break;
130 case AsmToken::Percent: outs() << "Percent\n"; break;
131 case AsmToken::Pipe: outs() << "Pipe\n"; break;
132 case AsmToken::PipePipe: outs() << "PipePipe\n"; break;
133 case AsmToken::Plus: outs() << "Plus\n"; break;
134 case AsmToken::RParen: outs() << "RParen\n"; break;
135 case AsmToken::Slash: outs() << "Slash\n"; break;
136 case AsmToken::Star: outs() << "Star\n"; break;
137 case AsmToken::Tilde: outs() << "Tilde\n"; break;
144 static TargetAsmParser *GetTargetAsmParser(const char *ProgName,
145 MCAsmParser &Parser) {
146 // Get the target specific parser.
148 const Target *TheTarget =
149 TargetRegistry::lookupTarget(TripleName,
150 /*FallbackToHost=*/true,
151 /*RequireJIT=*/false,
153 if (TheTarget == 0) {
154 errs() << ProgName << ": error: unable to get target for '" << TripleName
155 << "', see --version and --triple.\n";
159 if (TargetAsmParser *TAP = TheTarget->createAsmParser(Parser))
163 << ": error: this target does not support assembly parsing.\n";
167 static int AssembleInput(const char *ProgName) {
169 MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename, &Error);
171 errs() << ProgName << ": ";
173 errs() << Error << "\n";
175 errs() << "input file didn't read correctly.\n";
181 // Tell SrcMgr about this buffer, which is what TGParser will pick up.
182 SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
184 // Record the location of the include directories so that the lexer can find
186 SrcMgr.setIncludeDirs(IncludeDirs);
189 OwningPtr<MCStreamer> Str(createAsmStreamer(Ctx, outs()));
191 // FIXME: Target hook & command line option for initial section.
192 Str.get()->SwitchSection(Ctx.GetSection("__TEXT,__text,"
193 "regular,pure_instructions"));
195 AsmParser Parser(SrcMgr, Ctx, *Str.get());
196 OwningPtr<TargetAsmParser> TAP(GetTargetAsmParser(ProgName, Parser));
199 Parser.setTargetParser(*TAP.get());
204 int main(int argc, char **argv) {
205 // Print a stack trace if we signal out.
206 sys::PrintStackTraceOnErrorSignal();
207 PrettyStackTraceProgram X(argc, argv);
208 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
210 // Initialize targets and assembly parsers.
211 llvm::InitializeAllTargetInfos();
212 llvm::InitializeAllAsmParsers();
214 cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n");
219 return AsLexInput(argv[0]);
221 return AssembleInput(argv[0]);