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annotate tools/llvm-mc/Disassembler.cpp @ 120:1172e4bd9c6f

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update 4.0.0
author mir3636
date Fri, 25 Nov 2016 19:14:25 +0900
parents 60c9769439b8
children c2174574ed3a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //===- Disassembler.cpp - Disassembler for hex strings --------------------===//
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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 class implements the disassembler of strings of bytes written in
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11 // hexadecimal, from standard input or from a file.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "Disassembler.h"
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16 #include "llvm/ADT/Triple.h"
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17 #include "llvm/MC/MCAsmInfo.h"
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18 #include "llvm/MC/MCContext.h"
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19 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
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20 #include "llvm/MC/MCInst.h"
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21 #include "llvm/MC/MCRegisterInfo.h"
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22 #include "llvm/MC/MCStreamer.h"
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23 #include "llvm/MC/MCSubtargetInfo.h"
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24 #include "llvm/Support/MemoryBuffer.h"
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25 #include "llvm/Support/SourceMgr.h"
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26 #include "llvm/Support/TargetRegistry.h"
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27 #include "llvm/Support/raw_ostream.h"
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28
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29 using namespace llvm;
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30
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31 typedef std::pair<std::vector<unsigned char>, std::vector<const char *>>
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32 ByteArrayTy;
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33
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34 static bool PrintInsts(const MCDisassembler &DisAsm,
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35 const ByteArrayTy &Bytes,
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36 SourceMgr &SM, raw_ostream &Out,
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37 MCStreamer &Streamer, bool InAtomicBlock,
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38 const MCSubtargetInfo &STI) {
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39 ArrayRef<uint8_t> Data(Bytes.first.data(), Bytes.first.size());
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40
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41 // Disassemble it to strings.
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42 uint64_t Size;
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43 uint64_t Index;
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44
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45 for (Index = 0; Index < Bytes.first.size(); Index += Size) {
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46 MCInst Inst;
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47
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48 MCDisassembler::DecodeStatus S;
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49 S = DisAsm.getInstruction(Inst, Size, Data.slice(Index), Index,
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50 /*REMOVE*/ nulls(), nulls());
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51 switch (S) {
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52 case MCDisassembler::Fail:
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53 SM.PrintMessage(SMLoc::getFromPointer(Bytes.second[Index]),
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54 SourceMgr::DK_Warning,
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55 "invalid instruction encoding");
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56 // Don't try to resynchronise the stream in a block
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57 if (InAtomicBlock)
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58 return true;
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59
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60 if (Size == 0)
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61 Size = 1; // skip illegible bytes
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62
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63 break;
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64
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65 case MCDisassembler::SoftFail:
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66 SM.PrintMessage(SMLoc::getFromPointer(Bytes.second[Index]),
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67 SourceMgr::DK_Warning,
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68 "potentially undefined instruction encoding");
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69 LLVM_FALLTHROUGH;
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70
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71 case MCDisassembler::Success:
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72 Streamer.EmitInstruction(Inst, STI);
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73 break;
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74 }
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75 }
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76
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77 return false;
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78 }
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79
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80 static bool SkipToToken(StringRef &Str) {
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81 for (;;) {
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82 if (Str.empty())
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83 return false;
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84
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85 // Strip horizontal whitespace and commas.
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86 if (size_t Pos = Str.find_first_not_of(" \t\r\n,")) {
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87 Str = Str.substr(Pos);
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88 continue;
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89 }
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90
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91 // If this is the start of a comment, remove the rest of the line.
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92 if (Str[0] == '#') {
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93 Str = Str.substr(Str.find_first_of('\n'));
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94 continue;
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95 }
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96 return true;
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97 }
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98 }
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99
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100
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101 static bool ByteArrayFromString(ByteArrayTy &ByteArray,
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102 StringRef &Str,
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103 SourceMgr &SM) {
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104 while (SkipToToken(Str)) {
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105 // Handled by higher level
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106 if (Str[0] == '[' || Str[0] == ']')
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107 return false;
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108
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109 // Get the current token.
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110 size_t Next = Str.find_first_of(" \t\n\r,#[]");
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111 StringRef Value = Str.substr(0, Next);
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112
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113 // Convert to a byte and add to the byte vector.
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114 unsigned ByteVal;
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115 if (Value.getAsInteger(0, ByteVal) || ByteVal > 255) {
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116 // If we have an error, print it and skip to the end of line.
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117 SM.PrintMessage(SMLoc::getFromPointer(Value.data()), SourceMgr::DK_Error,
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118 "invalid input token");
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119 Str = Str.substr(Str.find('\n'));
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120 ByteArray.first.clear();
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121 ByteArray.second.clear();
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122 continue;
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123 }
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124
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125 ByteArray.first.push_back(ByteVal);
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126 ByteArray.second.push_back(Value.data());
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127 Str = Str.substr(Next);
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128 }
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129
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130 return false;
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131 }
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parents:
diff changeset
132
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133 int Disassembler::disassemble(const Target &T,
95c75e76d11b LLVM 3.4
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parents:
diff changeset
134 const std::string &Triple,
95c75e76d11b LLVM 3.4
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135 MCSubtargetInfo &STI,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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136 MCStreamer &Streamer,
95c75e76d11b LLVM 3.4
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diff changeset
137 MemoryBuffer &Buffer,
95c75e76d11b LLVM 3.4
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138 SourceMgr &SM,
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parents:
diff changeset
139 raw_ostream &Out) {
77
54457678186b LLVM 3.6
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parents: 0
diff changeset
140
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141 std::unique_ptr<const MCRegisterInfo> MRI(T.createMCRegInfo(Triple));
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parents: 0
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142 if (!MRI) {
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parents: 0
diff changeset
143 errs() << "error: no register info for target " << Triple << "\n";
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parents: 0
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144 return -1;
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parents: 0
diff changeset
145 }
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parents: 0
diff changeset
146
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parents: 0
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147 std::unique_ptr<const MCAsmInfo> MAI(T.createMCAsmInfo(*MRI, Triple));
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
148 if (!MAI) {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
149 errs() << "error: no assembly info for target " << Triple << "\n";
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150 return -1;
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parents: 0
diff changeset
151 }
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parents: 0
diff changeset
152
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diff changeset
153 // Set up the MCContext for creating symbols and MCExpr's.
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parents: 0
diff changeset
154 MCContext Ctx(MAI.get(), MRI.get(), nullptr);
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diff changeset
155
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diff changeset
156 std::unique_ptr<const MCDisassembler> DisAsm(
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
157 T.createMCDisassembler(STI, Ctx));
0
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diff changeset
158 if (!DisAsm) {
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diff changeset
159 errs() << "error: no disassembler for target " << Triple << "\n";
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parents:
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160 return -1;
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parents:
diff changeset
161 }
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parents:
diff changeset
162
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parents:
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163 // Set up initial section manually here
83
60c9769439b8 LLVM 3.7
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parents: 77
diff changeset
164 Streamer.InitSections(false);
0
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parents:
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165
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parents:
diff changeset
166 bool ErrorOccurred = false;
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parents:
diff changeset
167
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parents:
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168 // Convert the input to a vector for disassembly.
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parents:
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169 ByteArrayTy ByteArray;
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parents:
diff changeset
170 StringRef Str = Buffer.getBuffer();
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parents:
diff changeset
171 bool InAtomicBlock = false;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
172
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parents:
diff changeset
173 while (SkipToToken(Str)) {
83
60c9769439b8 LLVM 3.7
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
174 ByteArray.first.clear();
60c9769439b8 LLVM 3.7
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parents: 77
diff changeset
175 ByteArray.second.clear();
0
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parents:
diff changeset
176
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parents:
diff changeset
177 if (Str[0] == '[') {
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parents:
diff changeset
178 if (InAtomicBlock) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 SM.PrintMessage(SMLoc::getFromPointer(Str.data()), SourceMgr::DK_Error,
95c75e76d11b LLVM 3.4
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parents:
diff changeset
180 "nested atomic blocks make no sense");
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parents:
diff changeset
181 ErrorOccurred = true;
95c75e76d11b LLVM 3.4
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parents:
diff changeset
182 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
183 InAtomicBlock = true;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
184 Str = Str.drop_front();
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 continue;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 } else if (Str[0] == ']') {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
187 if (!InAtomicBlock) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 SM.PrintMessage(SMLoc::getFromPointer(Str.data()), SourceMgr::DK_Error,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 "attempt to close atomic block without opening");
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190 ErrorOccurred = true;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 InAtomicBlock = false;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
193 Str = Str.drop_front();
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
194 continue;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
195 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
196
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parents:
diff changeset
197 // It's a real token, get the bytes and emit them
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parents:
diff changeset
198 ErrorOccurred |= ByteArrayFromString(ByteArray, Str, SM);
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parents:
diff changeset
199
83
60c9769439b8 LLVM 3.7
Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
parents: 77
diff changeset
200 if (!ByteArray.first.empty())
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
201 ErrorOccurred |= PrintInsts(*DisAsm, ByteArray, SM, Out, Streamer,
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
202 InAtomicBlock, STI);
0
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
203 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
204
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
205 if (InAtomicBlock) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
206 SM.PrintMessage(SMLoc::getFromPointer(Str.data()), SourceMgr::DK_Error,
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
207 "unclosed atomic block");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
208 ErrorOccurred = true;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
209 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
210
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
211 return ErrorOccurred;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
212 }