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Diffstat (limited to 'tools/llvm-mc/llvm-mc.cpp')
-rw-r--r-- | tools/llvm-mc/llvm-mc.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/tools/llvm-mc/llvm-mc.cpp b/tools/llvm-mc/llvm-mc.cpp new file mode 100644 index 000000000000..52205c48d0fb --- /dev/null +++ b/tools/llvm-mc/llvm-mc.cpp @@ -0,0 +1,161 @@ +//===-- llvm-mc.cpp - Machine Code Hacking Driver -------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This utility is a simple driver that allows command line hacking on machine +// code. +// +//===----------------------------------------------------------------------===// + +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/Support/SourceMgr.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/System/Signals.h" +#include "AsmParser.h" +using namespace llvm; + +static cl::opt<std::string> +InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-")); + +static cl::opt<std::string> +OutputFilename("o", cl::desc("Output filename"), + cl::value_desc("filename")); + +static cl::list<std::string> +IncludeDirs("I", cl::desc("Directory of include files"), + cl::value_desc("directory"), cl::Prefix); + +enum ActionType { + AC_AsLex, + AC_Assemble +}; + +static cl::opt<ActionType> +Action(cl::desc("Action to perform:"), + cl::init(AC_Assemble), + cl::values(clEnumValN(AC_AsLex, "as-lex", + "Lex tokens from a .s file"), + clEnumValN(AC_Assemble, "assemble", + "Assemble a .s file (default)"), + clEnumValEnd)); + +static int AsLexInput(const char *ProgName) { + std::string ErrorMessage; + MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename, + &ErrorMessage); + if (Buffer == 0) { + errs() << ProgName << ": "; + if (ErrorMessage.size()) + errs() << ErrorMessage << "\n"; + else + errs() << "input file didn't read correctly.\n"; + return 1; + } + + SourceMgr SrcMgr; + + // Tell SrcMgr about this buffer, which is what TGParser will pick up. + SrcMgr.AddNewSourceBuffer(Buffer, SMLoc()); + + // Record the location of the include directories so that the lexer can find + // it later. + SrcMgr.setIncludeDirs(IncludeDirs); + + AsmLexer Lexer(SrcMgr); + + bool Error = false; + + asmtok::TokKind Tok = Lexer.Lex(); + while (Tok != asmtok::Eof) { + switch (Tok) { + default: + Lexer.PrintMessage(Lexer.getLoc(), "driver: unknown token"); + Error = true; + break; + case asmtok::Error: + Error = true; // error already printed. + break; + case asmtok::Identifier: + outs() << "identifier: " << Lexer.getCurStrVal() << '\n'; + break; + case asmtok::Register: + outs() << "register: " << Lexer.getCurStrVal() << '\n'; + break; + case asmtok::String: + outs() << "string: " << Lexer.getCurStrVal() << '\n'; + break; + case asmtok::IntVal: + outs() << "int: " << Lexer.getCurIntVal() << '\n'; + break; + case asmtok::EndOfStatement: outs() << "EndOfStatement\n"; break; + case asmtok::Colon: outs() << "Colon\n"; break; + case asmtok::Plus: outs() << "Plus\n"; break; + case asmtok::Minus: outs() << "Minus\n"; break; + case asmtok::Tilde: outs() << "Tilde\n"; break; + case asmtok::Slash: outs() << "Slash\n"; break; + case asmtok::LParen: outs() << "LParen\n"; break; + case asmtok::RParen: outs() << "RParen\n"; break; + case asmtok::Star: outs() << "Star\n"; break; + case asmtok::Comma: outs() << "Comma\n"; break; + case asmtok::Dollar: outs() << "Dollar\n"; break; + } + + Tok = Lexer.Lex(); + } + + return Error; +} + +static int AssembleInput(const char *ProgName) { + std::string ErrorMessage; + MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename, + &ErrorMessage); + if (Buffer == 0) { + errs() << ProgName << ": "; + if (ErrorMessage.size()) + errs() << ErrorMessage << "\n"; + else + errs() << "input file didn't read correctly.\n"; + return 1; + } + + SourceMgr SrcMgr; + + // Tell SrcMgr about this buffer, which is what TGParser will pick up. + SrcMgr.AddNewSourceBuffer(Buffer, SMLoc()); + + // Record the location of the include directories so that the lexer can find + // it later. + SrcMgr.setIncludeDirs(IncludeDirs); + + AsmParser Parser(SrcMgr); + return Parser.Run(); +} + + +int main(int argc, char **argv) { + // Print a stack trace if we signal out. + sys::PrintStackTraceOnErrorSignal(); + PrettyStackTraceProgram X(argc, argv); + llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. + cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n"); + + switch (Action) { + default: + case AC_AsLex: + return AsLexInput(argv[0]); + case AC_Assemble: + return AssembleInput(argv[0]); + } + + return 0; +} + |