Mercurial > hg > Members > tobaru > cbc > CbC_llvm
annotate lib/Support/Disassembler.cpp @ 3:9ad51c7bc036
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author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Wed, 15 May 2013 06:43:32 +0900 |
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1 //===- lib/Support/Disassembler.cpp -----------------------------*- C++ -*-===// |
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2 // |
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3 // The LLVM Compiler Infrastructure |
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4 // |
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5 // This file is distributed under the University of Illinois Open Source |
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6 // License. See LICENSE.TXT for details. |
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7 // |
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8 //===----------------------------------------------------------------------===// |
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9 // |
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10 // This file implements the necessary glue to call external disassembler |
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11 // libraries. |
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12 // |
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13 //===----------------------------------------------------------------------===// |
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14 |
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15 #include "llvm/Support/Disassembler.h" |
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16 #include "llvm/Config/config.h" |
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17 #include <cassert> |
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18 #include <iomanip> |
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19 #include <sstream> |
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20 #include <string> |
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21 |
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22 #if USE_UDIS86 |
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23 #include <udis86.h> |
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24 #endif |
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25 |
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26 using namespace llvm; |
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27 |
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28 bool llvm::sys::hasDisassembler() |
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29 { |
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30 #if defined (__i386__) || defined (__amd64__) || defined (__x86_64__) |
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31 // We have option to enable udis86 library. |
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32 # if USE_UDIS86 |
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33 return true; |
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34 #else |
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35 return false; |
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36 #endif |
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37 #else |
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38 return false; |
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39 #endif |
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40 } |
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41 |
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42 std::string llvm::sys::disassembleBuffer(uint8_t* start, size_t length, |
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43 uint64_t pc) { |
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44 std::stringstream res; |
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45 |
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46 #if (defined (__i386__) || defined (__amd64__) || defined (__x86_64__)) \ |
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47 && USE_UDIS86 |
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48 unsigned bits; |
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49 # if defined(__i386__) |
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50 bits = 32; |
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51 # else |
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52 bits = 64; |
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53 # endif |
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54 |
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55 ud_t ud_obj; |
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56 |
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57 ud_init(&ud_obj); |
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58 ud_set_input_buffer(&ud_obj, start, length); |
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59 ud_set_mode(&ud_obj, bits); |
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60 ud_set_pc(&ud_obj, pc); |
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61 ud_set_syntax(&ud_obj, UD_SYN_ATT); |
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62 |
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63 res << std::setbase(16) |
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64 << std::setw(bits/4); |
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65 |
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66 while (ud_disassemble(&ud_obj)) { |
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67 res << ud_insn_off(&ud_obj) << ":\t" << ud_insn_asm(&ud_obj) << "\n"; |
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68 } |
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69 #else |
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70 res << "No disassembler available. See configure help for options.\n"; |
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71 #endif |
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72 |
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73 return res.str(); |
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74 } |