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//===- lib/System/Disassembler.cpp ------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Anton Korobeynikov and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the necessary glue to call external disassembler
// libraries.
//
//===----------------------------------------------------------------------===//
#include "llvm/Config/config.h"
#include "llvm/System/Disassembler.h"
#include <cassert>
#include <iomanip>
#include <string>
#include <sstream>
#if USE_UDIS86
#include <udis86.h>
#endif
using namespace llvm;
bool llvm::sys::hasDisassembler(void)
{
#if defined (__i386__) || defined (__amd64__) || defined (__x86_64__)
// We have option to enable udis86 library.
return true;
#else
return false;
#endif
}
std::string llvm::sys::disassembleBuffer(uint8_t* start, size_t length,
uint64_t pc) {
std::stringstream res;
#if defined (__i386__) || defined (__amd64__) || defined (__x86_64__)
unsigned bits;
# if defined(__i386__)
bits = 32;
# else
bits = 64;
# endif
# if USE_UDIS86
ud_t ud_obj;
ud_init(&ud_obj);
ud_set_input_buffer(&ud_obj, start, length);
ud_set_mode(&ud_obj, bits);
ud_set_pc(&ud_obj, pc);
ud_set_syntax(&ud_obj, UD_SYN_ATT);
res << std::setbase(16)
<< std::setw(bits/4);
while (ud_disassemble(&ud_obj)) {
res << ud_insn_off(&ud_obj) << ":\t" << ud_insn_asm(&ud_obj) << "\n";
}
# else
res << "No disassembler available. See configure help for options.\n";
# endif
#else
res << "No disassembler available. See configure help for options.\n";
#endif
return res.str();
}
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