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//===-- 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/MC/MCContext.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/ADT/OwningPtr.h"
#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(), "unknown token", "warning");
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);
MCContext Ctx;
OwningPtr<MCStreamer> Str(createAsmStreamer(Ctx, outs()));
// FIXME: Target hook & command line option for initial section.
Str.get()->SwitchSection(Ctx.GetSection("__TEXT,__text,regular,pure_instructions"));
AsmParser Parser(SrcMgr, Ctx, *Str.get());
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;
}
|
