util: integrate LLVM-based Disassembler

The LLVM Disassembler infrastructure can be used to analyze many kinds
of ELF Binaries. For every instruction the used and defined registers
is available as well as information about the instruction itself.

Change-Id: I9cc89b6c116ceff7b5143a6f179ae31c4e994d2d

src/core/util/llvmdisassembler/testing/llvmDisTest.cc

@@ -0,0 +1,68 @@
+#ifndef __puma
+#include "../LLVMDisassembler.hpp"
+
+using namespace llvm;
+using namespace llvm::object;
+using namespace fail;
+
+int main(int argc, char* argv[]) {
+	llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
+	// Initialize targets and assembly printers/parsers.
+	llvm::InitializeAllTargetInfos();
+	llvm::InitializeAllTargetMCs();
+	//	  llvm::InitializeAllAsmParsers();
+	llvm::InitializeAllDisassemblers();
+
+	std::string file;
+
+	if(argc > 1){
+		std::cout << "Trying to disassemble: " << argv[1] << std::endl;
+		file = argv[1];
+	} else {
+		std::cerr << "No file to disassemble :(" << std::endl;
+		return -1;
+	}
+
+	OwningPtr<Binary> binary;
+	if (error_code ec = createBinary(file, binary)) {
+		std::cerr << "Dis" << ": '" << file << "': " << ec.message() << ".\n";
+		return -1;
+	}
+
+	ObjectFile *obj = dyn_cast<ObjectFile>(binary.get());
+
+	LLVMDisassembler disas(obj);
+	disas.disassemble();
+
+	LLVMDisassembler::InstrMap &instr_map = disas.getInstrMap();
+	std::cout << "Map Size: " << instr_map.size() << "\nTriple: " << disas.GetTriple() <<  std::endl;
+
+	LLVMDisassembler::InstrMap::const_iterator itr;
+	const MCRegisterInfo &reg_info = disas.getRegisterInfo();
+
+	std::cout << std::endl << "Number of Registers: " << reg_info.getNumRegs() << std::endl;
+	//	for(unsigned int i = 0; i < reg_info.getNumRegs(); ++i){
+	//	  std::cout << i << " - " <<  reg_info.getName(i) << std::endl;
+	//	}
+	fail::LLVMtoFailTranslator & ltof =	 disas.getTranslator() ;
+
+	for(itr = instr_map.begin(); itr != instr_map.end(); ++itr){
+		const LLVMDisassembler::Instr &instr = (*itr).second;
+		std::cout << std::hex << (*itr).first << " | "	<< instr.opcode << std::endl;
+		std::cout << std::dec << "USES: ";
+		for (std::vector<uint16_t>::const_iterator it = instr.reg_uses.begin();
+			 it != instr.reg_uses.end(); ++it) {
+			std::cout << reg_info.getName(*it) <<"(" << *it << ") ";
+			std::cout << "Fail: " << ltof.getFailRegisterId(*it) << " ";
+		}
+		std::cout << std::endl;
+
+		std::cout << "DEFS: ";
+		for (std::vector<uint16_t>::const_iterator it = instr.reg_defs.begin();
+			 it != instr.reg_defs.end(); ++it) {
+			std::cout << reg_info.getName(*it) << "(" << *it << ") ";
+		}
+		std::cout << std::endl;
+	}
+}
+#endif