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